1585290000
Flutter Download Progress Indicator
In this tutorial, I demonstrate how to create download progress indictor in Flutter.
With help of dio and path_provider library we can achieve this real quick.
path_provider #
A Flutter plugin for finding commonly used locations on the filesystem. Supports iOS and Android.
Usage
To use this plugin, add path_provider as a dependency in your pubspec.yaml file.
Example
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
Directory appDocDir = await getApplicationDocumentsDirectory();
String appDocPath = appDocDir.path;
Please see the example app of this plugin for a full example.
dio
A powerful Http client for Dart, which supports Interceptors, Global configuration, FormData, Request Cancellation, File downloading, Timeout etc.
Get started
Add dependency
dependencies:
dio: 3.x #latest version
In order to support Flutter Web, v3.x was heavily refactored, so it was not compatible with version 3.x See here for a detailed list of updates.
Super simple to use
import 'package:dio/dio.dart';
void getHttp() async {
try {
Response response = await Dio().get("http://www.google.com");
print(response);
} catch (e) {
print(e);
}
}
awesome-dio
🎉 A curated list of awesome things related to dio.
Related Projects
Welcome to submit Dio’s third-party plugins and related libraries here .
Examples
Performing a GET request:
Response response;
Dio dio = new Dio();
response = await dio.get("/test?id=12&name=wendu");
print(response.data.toString());
// Optionally the request above could also be done as
response = await dio.get("/test", queryParameters: {"id": 12, "name": "wendu"});
print(response.data.toString());
Performing a POST request:
response = await dio.post("/test", data: {"id": 12, "name": "wendu"});
Performing multiple concurrent requests:
response = await Future.wait([dio.post("/info"), dio.get("/token")]);
Downloading a file:
response = await dio.download("https://www.google.com/", "./xx.html");
Get response stream:
Response<ResponseBody> rs = await Dio().get<ResponseBody>(url,
options: Options(responseType: ResponseType.stream), // set responseType to `stream`
);
print(rs.data.stream); //response stream
Get response with bytes:
Response<List<int>> rs = await Dio().get<List<int>>(url,
options: Options(responseType: ResponseType.bytes), // // set responseType to `bytes`
);
print(rs.data); // List<int>
Sending FormData:
FormData formData = new FormData.fromMap({
"name": "wendux",
"age": 25,
});
response = await dio.post("/info", data: formData);
Uploading multiple files to server by FormData:
FormData.fromMap({
"name": "wendux",
"age": 25,
"file": await MultipartFile.fromFile("./text.txt",filename: "upload.txt"),
"files": [
await MultipartFile.fromFile("./text1.txt", filename: "text1.txt"),
await MultipartFile.fromFile("./text2.txt", filename: "text2.txt"),
]
});
response = await dio.post("/info", data: formData);
Listening the uploading progress:
response = await dio.post(
"http://www.dtworkroom.com/doris/1/2.0.0/test",
data: {"aa": "bb" * 22},
onSendProgress: (int sent, int total) {
print("$sent $total");
},
);
Post binary data by Stream:
// Binary data
List<int> postData = <int>[...];
await dio.post(
url,
data: Stream.fromIterable(postData.map((e) => [e])), //create a Stream<List<int>>
options: Options(
headers: {
Headers.contentLengthHeader: postData.length, // set content-length
},
),
);
…you can find all examples code here.
Dio APIs
Creating an instance and set default configs.
You can create instance of Dio with an optional BaseOptions object:
Dio dio = new Dio(); // with default Options
// Set default configs
dio.options.baseUrl = "https://www.xx.com/api";
dio.options.connectTimeout = 5000; //5s
dio.options.receiveTimeout = 3000;
// or new Dio with a BaseOptions instance.
BaseOptions options = new BaseOptions(
baseUrl: "https://www.xx.com/api",
connectTimeout: 5000,
receiveTimeout: 3000,
);
Dio dio = new Dio(options);
The core API in Dio instance is:
Future
response=await request(
"/test",
data: {"id":12,"name":"xx"},
options: Options(method:"GET"),
);
Request method aliases
For convenience aliases have been provided for all supported request methods.
Future
Future
Future
Future
Future
Future
Future
Future
Request Options
The Options class describes the http request information and configuration. Each Dio instance has a base config for all requests maked by itself, and we can override the base config with [Options] when make a single request. The [BaseOptions] declaration as follows:
{
/// Http method.
String method;
/// Request base url, it can contain sub path, like: "https://www.google.com/api/".
String baseUrl;
/// Http request headers.
Map<String, dynamic> headers;
/// Timeout in milliseconds for opening url.
int connectTimeout;
/// Whenever more than [receiveTimeout] (in milliseconds) passes between two events from response stream,
/// [Dio] will throw the [DioError] with [DioErrorType.RECEIVE_TIMEOUT].
/// Note: This is not the receiving time limitation.
int receiveTimeout;
/// Request data, can be any type.
T data;
/// If the `path` starts with "http(s)", the `baseURL` will be ignored, otherwise,
/// it will be combined and then resolved with the baseUrl.
String path="";
/// The request Content-Type. The default value is "application/json; charset=utf-8".
/// If you want to encode request body with "application/x-www-form-urlencoded",
/// you can set [Headers.formUrlEncodedContentType], and [Dio]
/// will automatically encode the request body.
String contentType;
/// [responseType] indicates the type of data that the server will respond with
/// options which defined in [ResponseType] are `JSON`, `STREAM`, `PLAIN`.
///
/// The default value is `JSON`, dio will parse response string to json object automatically
/// when the content-type of response is "application/json".
///
/// If you want to receive response data with binary bytes, for example,
/// downloading a image, use `STREAM`.
///
/// If you want to receive the response data with String, use `PLAIN`.
ResponseType responseType;
/// `validateStatus` defines whether the request is successful for a given
/// HTTP response status code. If `validateStatus` returns `true` ,
/// the request will be perceived as successful; otherwise, considered as failed.
ValidateStatus validateStatus;
/// Custom field that you can retrieve it later in [Interceptor]、[Transformer] and the [Response] object.
Map<String, dynamic> extra;
/// Common query parameters
Map<String, dynamic /*String|Iterable<String>*/ > queryParameters;
}
There is a complete example here.
Response Schema
The response for a request contains the following information.
{
/// Response body. may have been transformed, please refer to [ResponseType].
T data;
/// Response headers.
Headers headers;
/// The corresponding request info.
Options request;
/// Http status code.
int statusCode;
/// Whether redirect
bool isRedirect;
/// redirect info
List<RedirectInfo> redirects ;
/// Returns the final real request uri (maybe redirect).
Uri realUri;
/// Custom field that you can retrieve it later in `then`.
Map<String, dynamic> extra;
}
When request is succeed, you will receive the response as follows:
Response response = await dio.get("https://www.google.com");
print(response.data);
print(response.headers);
print(response.request);
print(response.statusCode);
Interceptors
For each dio instance, We can add one or more interceptors, by which we can intercept requests or responses before they are handled by then or catchError.
dio.interceptors.add(InterceptorsWrapper(
onRequest:(RequestOptions options) async {
// Do something before request is sent
return options; //continue
// If you want to resolve the request with some custom data，
// you can return a `Response` object or return `dio.resolve(data)`.
// If you want to reject the request with a error message,
// you can return a `DioError` object or return `dio.reject(errMsg)`
},
onResponse:(Response response) async {
// Do something with response data
return response; // continue
},
onError: (DioError e) async {
// Do something with response error
return e;//continue
}
));
Resolve and reject the request
In all interceptors, you can interfere with their execution flow. If you want to resolve the request/response with some custom data，you can return a Response object or return dio.resolve(data). If you want to reject the request/response with a error message, you can return a DioError object or return dio.reject(errMsg) .
dio.interceptors.add(InterceptorsWrapper(
onRequest:(RequestOptions options) {
return dio.resolve("fake data")
},
));
Response response = await dio.get("/test");
print(response.data);//"fake data"
Lock/unlock the interceptors
You can lock/unlock the interceptors by calling their lock()/unlock method. Once the request/response interceptor is locked, the incoming request/response will be added to a queue before they enter the interceptor, they will not be continued until the interceptor is unlocked.
tokenDio = new Dio(); //Create a new instance to request the token.
tokenDio.options = dio;
dio.interceptors.add(InterceptorsWrapper(
onRequest:(Options options) async {
// If no token, request token firstly and lock this interceptor
// to prevent other request enter this interceptor.
dio.interceptors.requestLock.lock();
// We use a new Dio(to avoid dead lock) instance to request token.
Response response = await tokenDio.get("/token");
//Set the token to headers
options.headers["token"] = response.data["data"]["token"];
dio.interceptors.requestLock.unlock();
return options; //continue
}
));
You can clean the waiting queue by calling clear();
aliases
When the request interceptor is locked, the incoming request will pause, this is equivalent to we locked the current dio instance, Therefore, Dio provied the two aliases for the lock/unlock of request interceptors.
dio.lock() == dio.interceptors.requestLock.lock()
dio.unlock() == dio.interceptors.requestLock.unlock()
dio.clear() == dio.interceptors.requestLock.clear()
Example
Because of security reasons, we need all the requests to set up a csrfToken in the header, if csrfToken does not exist, we need to request a csrfToken first, and then perform the network request, because the request csrfToken progress is asynchronous, so we need to execute this async request in request interceptor. The code is as follows:
dio.interceptors.add(InterceptorsWrapper(
onRequest: (Options options) async {
print('send request：path:${options.path}，baseURL:${options.baseUrl}');
if (csrfToken == null) {
print("no token，request token firstly...");
//lock the dio.
dio.lock();
return tokenDio.get("/token").then((d) {
options.headers["csrfToken"] = csrfToken = d.data['data']['token'];
print("request token succeed, value: " + d.data['data']['token']);
print(
'continue to perform request：path:${options.path}，baseURL:${options.path}');
return options;
}).whenComplete(() => dio.unlock()); // unlock the dio
} else {
options.headers["csrfToken"] = csrfToken;
return options;
}
}
));
For complete codes click here.
Log
You can set LogInterceptor to print request/response log automaticlly, for example:
dio.interceptors.add(LogInterceptor(responseBody: false)); //开启请求日志
Custom Interceptor
You can custom interceptor by extending the Interceptor class. There is an example that implementing a simple cache policy: custom cache interceptor.
Cookie Manager
dio_cookie_manager package is a cookie manager for Dio.
Handling Errors
When a error occurs, Dio will wrap the Error/Exception to a DioError:
try {
//404
await dio.get("https://wendux.github.io/xsddddd");
} on DioError catch(e) {
// The request was made and the server responded with a status code
// that falls out of the range of 2xx and is also not 304.
if(e.response) {
print(e.response.data)
print(e.response.headers)
print(e.response.request)
} else{
// Something happened in setting up or sending the request that triggered an Error
print(e.request)
print(e.message)
}
}
DioError scheme
{
/// Response info, it may be `null` if the request can't reach to
/// the http server, for example, occurring a dns error, network is not available.
Response response;
/// Error descriptions.
String message;
DioErrorType type;
/// The original error/exception object; It's usually not null when `type`
/// is DioErrorType.DEFAULT
dynamic error;
}
DioErrorType
enum DioErrorType {
/// When opening url timeout, it occurs.
CONNECT_TIMEOUT,
///It occurs when receiving timeout.
RECEIVE_TIMEOUT,
/// When the server response, but with a incorrect status, such as 404, 503...
RESPONSE,
/// When the request is cancelled, dio will throw a error with this type.
CANCEL,
/// Default error type, Some other Error. In this case, you can
/// read the DioError.error if it is not null.
DEFAULT,
}
Using application/x-www-form-urlencoded format
By default, Dio serializes request data(except String type) to JSON. To send data in the application/x-www-form-urlencoded format instead, you can :
//Instance level
dio.options.contentType= Headers.formUrlEncodedContentType;
//or works once
dio.post("/info", data:{"id":5},
options: Options(contentType:Headers.formUrlEncodedContentType ));
Sending FormData
You can also send FormData with Dio, which will send data in the multipart/form-data, and it supports uploading files.
FormData formData = FormData.from({
"name": "wendux",
"age": 25,
"file": await MultipartFile.fromFile("./text.txt",filename: "upload.txt")
});
response = await dio.post("/info", data: formData);
There is a complete example here.
Multiple files upload
There are two ways to add multiple files to FormData， the only difference is that upload keys are different for array types。
FormData.fromMap({
"files": [
MultipartFile.fromFileSync("./example/upload.txt",
filename: "upload.txt"),
MultipartFile.fromFileSync("./example/upload.txt",
filename: "upload.txt"),
]
});
The upload key eventually becomes “files[]”，This is because many back-end services add a middle bracket to key when they get an array of files. If you don’t want “[]”，you should create FormData as follows（Don’t use FormData.fromMap）:
var formData = FormData();
formData.files.addAll([
MapEntry(
"files",
MultipartFile.fromFileSync("./example/upload.txt",
filename: "upload.txt"),
),
MapEntry(
"files",
MultipartFile.fromFileSync("./example/upload.txt",
filename: "upload.txt"),
),
]);
Transformer
Transformer allows changes to the request/response data before it is sent/received to/from the server. This is only applicable for request methods ‘PUT’, ‘POST’, and ‘PATCH’. Dio has already implemented a DefaultTransformer, and as the default Transformer. If you want to customize the transformation of request/response data, you can provide a Transformer by your self, and replace the DefaultTransformer by setting the dio.transformer.
In flutter
If you use dio in flutter development, you’d better to decode json in background with [compute] function.
// Must be top-level function
_parseAndDecode(String response) {
return jsonDecode(response);
}
parseJson(String text) {
return compute(_parseAndDecode, text);
}
void main() {
...
//Custom jsonDecodeCallback
(dio.transformer as DefaultTransformer).jsonDecodeCallback = parseJson;
runApp(MyApp());
}
Other Example
There is an example for customizing Transformer.
HttpClientAdapter
HttpClientAdapter is a bridge between Dio and HttpClient.
Dio implements standard and friendly API for developer.
HttpClient: It is the real object that makes Http requests.
We can use any HttpClient not just dart:io:HttpClient to make the Http request. And all we need is providing a HttpClientAdapter. The default HttpClientAdapter for Dio is DefaultHttpClientAdapter.
dio.httpClientAdapter = new DefaultHttpClientAdapter();
Here is a simple example to custom adapter.
Using proxy
DefaultHttpClientAdapter provide a callback to set proxy to dart:io:HttpClient, for example:
import 'package:dio/dio.dart';
import 'package:dio/adapter.dart';
...
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (client) {
// config the http client
client.findProxy = (uri) {
//proxy all request to localhost:8888
return "PROXY localhost:8888";
};
// you can also create a new HttpClient to dio
// return new HttpClient();
};
There is a complete example here.
Https certificate verification
There are two ways to verify the https certificate. Suppose the certificate format is PEM, the code like:
String PEM="XXXXX"; // certificate content
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (client) {
client.badCertificateCallback=(X509Certificate cert, String host, int port){
if(cert.pem==PEM){ // Verify the certificate
return true;
}
return false;
};
};
Another way is creating a SecurityContext when create the HttpClient:
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (client) {
SecurityContext sc = new SecurityContext();
//file is the path of certificate
sc.setTrustedCertificates(file);
HttpClient httpClient = new HttpClient(context: sc);
return httpClient;
};
In this way, the format of certificate must be PEM or PKCS12.
Http2 support
dio_http2_adapter package is a Dio HttpClientAdapter which support Http/2.0 .
Cancellation
You can cancel a request using a cancel token. One token can be shared with multiple requests. When a token’s cancel method invoked, all requests with this token will be cancelled.
CancelToken token = CancelToken();
dio.get(url1, cancelToken: token);
dio.get(url2, cancelToken: token);
// cancel the requests with "cancelled" message.
token.cancel("cancelled");
There is a complete example here.
Extends Dio class
Dio is a abstract class with factory constructor，so we don’t extend Dio class directy. For this purpose, we can extend DioForNative or DioForBrowser instead, for example:
import 'package:dio/dio.dart';
import 'package:dio/native_imp.dart'; //If in browser, import 'package:dio/browser_imp.dart'
class Http extends DioForNative {
Http([BaseOptions options]):super(options){
// do something
}
}
We can also implement our Dio client:
class MyDio with DioMixin implements Dio{
// ...
}
#flutter #mobile-apps
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Validate Multi Step Form Using jQuery
In this article, we will see how to validate multi step form wizard using jquery. Here, we will learn to validate the multi step form using jquery. First, we create the multi step form using bootstrap. Also, in this example, we are not using any jquery plugin for multi step form wizard.
So, let's see jquery multi step form with validation, how to create multi step form, multi step form wizard with jquery validation, bootstrap 4 multi step form wizard with validation, multi step form bootstrap 5, and jQuery multi step form with validation and next previous navigation.
Add HTML:
<html lang="en">
</head>
<link href="https://fonts.googleapis.com/css?family=Roboto:400,700&display=swap" rel="stylesheet">
</head>
<body>
<div class="main">
<h3>How To Validate Multi Step Form Using jQuery - Websolutionstuff</h3>
<form id="multistep_form">
<!-- progressbar -->
<ul id="progress_header">
<li class="active"></li>
<li></li>
<li></li>
</ul>
<!-- Step 01 -->
<div class="multistep-box">
<div class="title-box">
<h2>Create your account</h2>
</div>
<p>
<input type="text" name="email" placeholder="Email" id="email">
<span id="error-email"></span>
</p>
<p>
<input type="password" name="pass" placeholder="Password" id="pass">
<span id="error-pass"></span>
</p>
<p>
<input type="password" name="cpass" placeholder="Confirm Password" id="cpass">
<span id="error-cpass"></span>
</p>
<p class="nxt-prev-button"><input type="button" name="next" class="fs_next_btn action-button" value="Next" /></p>
</div>
<!-- Step 02 -->
<div class="multistep-box">
<div class="title-box">
<h2>Social Profiles</h2>
</div>
<p>
<input type="text" name="twitter" placeholder="Twitter" id="twitter">
<span id="error-twitter"></span>
</p>
<p>
<input type="text" name="facebook" placeholder="Facebook" id="facebook">
<span id="error-facebook"></span>
</p>
<p>
<input type="text" name="linkedin" placeholder="Linkedin" id="linkedin">
<span id="error-linkedin"></span>
</p>
<p class="nxt-prev-button">
<input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="button" name="next" class="ss_next_btn action-button" value="Next" />
</p>
</div>
<!-- Step 03 -->
<div class="multistep-box">
<div class="title-box">
<h2>Personal Details</h2>
</div>
<p>
<input type="text" name="fname" placeholder="First Name" id="fname">
<span id="error-fname"></span>
</p>
<p>
<input type="text" name="lname" placeholder="Last Name" id="lname">
<span id="error-lname"></span>
</p>
<p>
<input type="text" name="phone" placeholder="Phone" id="phone">
<span id="error-phone"></span>
</p>
<p>
<textarea name="address" placeholder="Address" id="address"></textarea>
<span id="error-address"></span>
</p>
<p class="nxt-prev-button"><input type="button" name="previous" class="previous action-button" value="Previous" />
<input type="submit" name="submit" class="submit_btn ts_next_btn action-button" value="Submit" />
</p>
</div>
</form>
<h1>You are successfully logged in</h1>
</div>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.0/jquery.easing.js" type="text/javascript"></script>
</body>
</html>Add CSS:
body {
display: inline-block;
width: 100%;
height: 100vh;
overflow: hidden;
background-image: url("https://img1.akspic.com/image/80377-gadget-numeric_keypad-input_device-electronic_device-space_bar-3840x2160.jpg");
background-repeat: no-repeat;
background-size: cover;
position: relative;
margin: 0;
font-weight: 400;
font-family: 'Roboto', sans-serif;
}
body:before {
content: "";
display: block;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.5);
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
.main {
position: absolute;
left: 0;
right: 0;
top: 30px;
margin: 0 auto;
height: 515px;
}
input:-internal-autofill-selected {
background-color: #fff !important;
}
#multistep_form {
width: 550px;
margin: 0 auto;
text-align: center;
position: relative;
height: 100%;
z-index: 999;
opacity: 1;
visibility: visible;
}
/*progress header*/
#progress_header {
overflow: hidden;
margin: 0 auto 30px;
padding: 0;
}
#progress_header li {
list-style-type: none;
width: 33.33%;
float: left;
position: relative;
font-size: 16px;
font-weight: bold;
font-family: monospace;
color: #fff;
text-transform: uppercase;
}
#progress_header li:after {
width: 35px;
line-height: 35px;
display: block;
font-size: 22px;
color: #888;
font-family: monospace;
background-color: #fff;
border-radius: 100px;
margin: 0 auto;
background-repeat: no-repeat;
font-family: 'Roboto', sans-serif;
}
#progress_header li:nth-child(1):after {
content: "1";
}
#progress_header li:nth-child(2):after {
content: "2";
}
#progress_header li:nth-child(3):after {
content: "3";
}
#progress_header li:before {
content: '';
width: 100%;
height: 5px;
background: #fff;
position: absolute;
left: -50%;
top: 50%;
z-index: -1;
}
#progress_header li:first-child:before {
content: none;
}
#progress_header li.active:before,
#progress_header li.active:after {
background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
color: #fff !important;
transition: all 0.5s;
}
/*title*/
.title-box {
width: 100%;
margin: 0 0 30px 0;
}
.title-box h2 {
font-size: 22px;
text-transform: uppercase;
color: #2C3E50;
margin: 0;
font-family: cursive;
display: inline-block;
position: relative;
padding: 0 0 10px 0;
font-family: 'Roboto', sans-serif;
}
.title-box h2:before {
content: "";
background: #6ddc8b;
width: 70px;
height: 2px;
position: absolute;
bottom: 0;
left: 0;
right: 0;
margin: 0 auto;
display: block;
}
.title-box h2:after {
content: "";
background: #6ddc8b;
width: 50px;
height: 2px;
position: absolute;
bottom: -5px;
left: 0;
right: 0;
margin: 0 auto;
display: block;
}
/*Input and Button*/
.multistep-box {
background: white;
border: 0 none;
border-radius: 3px;
box-shadow: 1px 1px 55px 3px rgba(255, 255, 255, 0.4);
padding: 30px 30px;
box-sizing: border-box;
width: 80%;
margin: 0 10%;
position: absolute;
}
.multistep-box:not(:first-of-type) {
display: none;
}
.multistep-box p {
margin: 0 0 12px 0;
text-align: left;
}
.multistep-box span {
font-size: 12px;
color: #FF0000;
}
input, textarea {
padding: 15px;
border: 1px solid #ccc;
border-radius: 3px;
margin: 0;
width: 100%;
box-sizing: border-box;
font-family: 'Roboto', sans-serif;
color: #2C3E50;
font-size: 13px;
transition: all 0.5s;
outline: none;
}
input:focus, textarea:focus {
box-shadow: inset 0px 0px 50px 2px rgb(0,0,0,0.1);
}
input.box_error, textarea.box_error {
border-color: #FF0000;
box-shadow: inset 0px 0px 50px 2px rgb(255,0,0,0.1);
}
input.box_error:focus, textarea.box_error:focus {
box-shadow: inset 0px 0px 50px 2px rgb(255,0,0,0.1);
}
p.nxt-prev-button {
margin: 25px 0 0 0;
text-align: center;
}
.action-button {
width: 100px;
font-weight: bold;
color: white;
border: 0 none;
border-radius: 1px;
cursor: pointer;
padding: 10px 5px;
margin: 0 5px;
background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b);
transition: all 0.5s;
}
.action-button:hover,
.action-button:focus {
box-shadow: 0 0 0 2px white, 0 0 0 3px #6ce199;
}
.form_submited #multistep_form {
opacity: 0;
visibility: hidden;
}
.form_submited h1 {
-webkit-background-clip: text;
transform: translate(0%, 0%);
-webkit-transform: translate(0%, 0%);
transition: all 0.3s ease;
opacity: 1;
visibility: visible;
}
h1 {
margin: 0;
text-align: center;
font-size: 90px;
background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
background-image: linear-gradient(to right top, #35e8c3, #36edbb, #3df2b2, #4af7a7, #59fb9b) !important;
color: transparent;
-webkit-background-clip: text;
-webkit-background-clip: text;
transform: translate(0%, -80%);
-webkit-transform: translate(0%, -80%);
transition: all 0.3s ease;
opacity: 0;
visibility: hidden;
position: absolute;
left: 0;
right: 0;
margin: 0 auto;
text-align: center;
top: 50%;
}
h3{
color:#fff;
text-align:center;
margin-bottom:20px;
}Add jQuery:
var current_slide, next_slide, previous_slide;
var left, opacity, scale;
var animation;
var error = false;
// email validation
$("#email").keyup(function() {
var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
if (!emailReg.test($("#email").val())) {
$("#error-email").text('Please enter an Email addres.');
$("#email").addClass("box_error");
error = true;
} else {
$("#error-email").text('');
error = false;
$("#email").removeClass("box_error");
}
});
// password validation
$("#pass").keyup(function() {
var pass = $("#pass").val();
var cpass = $("#cpass").val();
if (pass != '') {
$("#error-pass").text('');
error = false;
$("#pass").removeClass("box_error");
}
if (pass != cpass && cpass != '') {
$("#error-cpass").text('Password and Confirm Password is not matched.');
error = true;
} else {
$("#error-cpass").text('');
error = false;
}
});
// confirm password validation
$("#cpass").keyup(function() {
var pass = $("#pass").val();
var cpass = $("#cpass").val();
if (pass != cpass) {
$("#error-cpass").text('Please enter the same Password as above.');
$("#cpass").addClass("box_error");
error = true;
} else {
$("#error-cpass").text('');
error = false;
$("#cpass").removeClass("box_error");
}
});
// twitter
$("#twitter").keyup(function() {
var twitterReg = /https?:\/\/twitter\.com\/(#!\/)?[a-z0-9_]+$/;
if (!twitterReg.test($("#twitter").val())) {
$("#error-twitter").text('Twitter link is not valid.');
$("#twitter").addClass("box_error");
error = true;
} else {
$("#error-twitter").text('');
error = false;
$("#twitter").removeClass("box_error");
}
});
// facebook
$("#facebook").keyup(function() {
var facebookReg = /^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/;
if (!facebookReg.test($("#facebook").val())) {
$("#error-facebook").text('Facebook link is not valid.');
$("#facebook").addClass("box_error");
error = true;
} else {
$("#error-facebook").text('');
error = false;
$("#facebook").removeClass("box_error");
}
});
// linkedin
$("#linkedin").keyup(function() {
var linkedinReg = /(ftp|http|https):\/\/?(?:www\.)?linkedin.com(\w+:{0,1}\w*@)?(\S+)(:([0-9])+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
if (!linkedinReg.test($("#linkedin").val())) {
$("#error-linkedin").text('Linkedin link is not valid.');
$("#linkedin").addClass("box_error");
error = true;
} else {
$("#error-linkedin").text('');
error = false;
$("#linkedin").removeClass("box_error");
}
});
// first name
$("#fname").keyup(function() {
var fname = $("#fname").val();
if (fname == '') {
$("#error-fname").text('Enter your First name.');
$("#fname").addClass("box_error");
error = true;
} else {
$("#error-fname").text('');
error = false;
}
if ((fname.length <= 2) || (fname.length > 20)) {
$("#error-fname").text("User length must be between 2 and 20 Characters.");
$("#fname").addClass("box_error");
error = true;
}
if (!isNaN(fname)) {
$("#error-fname").text("Only Characters are allowed.");
$("#fname").addClass("box_error");
error = true;
} else {
$("#fname").removeClass("box_error");
}
});
// last name
$("#lname").keyup(function() {
var lname = $("#lname").val();
if (lname != lname) {
$("#error-lname").text('Enter your Last name.');
$("#lname").addClass("box_error");
error = true;
} else {
$("#error-lname").text('');
error = false;
}
if ((lname.length <= 2) || (lname.length > 20)) {
$("#error-lname").text("User length must be between 2 and 20 Characters.");
$("#lname").addClass("box_error");
error = true;
}
if (!isNaN(lname)) {
$("#error-lname").text("Only Characters are allowed.");
$("#lname").addClass("box_error");
error = true;
} else {
$("#lname").removeClass("box_error");
}
});
// phone
$("#phone").keyup(function() {
var phone = $("#phone").val();
if (phone != phone) {
$("#error-phone").text('Enter your Phone number.');
$("#phone").addClass("box_error");
error = true;
} else {
$("#error-phone").text('');
error = false;
}
if (phone.length != 10) {
$("#error-phone").text("Mobile number must be of 10 Digits only.");
$("#phone").addClass("box_error");
error = true;
} else {
$("#phone").removeClass("box_error");
}
});
// address
$("#address").keyup(function() {
var address = $("#address").val();
if (address != address) {
$("#error-address").text('Enter your Address.');
$("#address").addClass("box_error");
error = true;
} else {
$("#error-address").text('');
error = false;
$("#address").removeClass("box_error");
}
});
// first step validation
$(".fs_next_btn").click(function() {
// email
if ($("#email").val() == '') {
$("#error-email").text('Please enter an email address.');
$("#email").addClass("box_error");
error = true;
} else {
var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
if (!emailReg.test($("#email").val())) {
$("#error-email").text('Please insert a valid email address.');
error = true;
} else {
$("#error-email").text('');
$("#email").removeClass("box_error");
}
}
// password
if ($("#pass").val() == '') {
$("#error-pass").text('Please enter a password.');
$("#pass").addClass("box_error");
error = true;
}
if ($("#cpass").val() == '') {
$("#error-cpass").text('Please enter a Confirm password.');
$("#cpass").addClass("box_error");
error = true;
} else {
var pass = $("#pass").val();
var cpass = $("#cpass").val();
if (pass != cpass) {
$("#error-cpass").text('Please enter the same password as above.');
error = true;
} else {
$("#error-cpass").text('');
$("#pass").removeClass("box_error");
$("#cpass").removeClass("box_error");
}
}
// animation
if (!error) {
if (animation) return false;
animation = true;
current_slide = $(this).parent().parent();
next_slide = $(this).parent().parent().next();
$("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");
next_slide.show();
current_slide.animate({
opacity: 0
}, {
step: function(now, mx) {
scale = 1 - (1 - now) * 0.2;
left = (now * 50) + "%";
opacity = 1 - now;
current_slide.css({
'transform': 'scale(' + scale + ')'
});
next_slide.css({
'left': left,
'opacity': opacity
});
},
duration: 800,
complete: function() {
current_slide.hide();
animation = false;
},
easing: 'easeInOutBack'
});
}
});
// second step validation
$(".ss_next_btn").click(function() {
// twitter
if ($("#twitter").val() == '') {
$("#error-twitter").text('twitter link is required.');
$("#twitter").addClass("box_error");
error = true;
} else {
var twitterReg = /https?:\/\/twitter\.com\/(#!\/)?[a-z0-9_]+$/;
if (!twitterReg.test($("#twitter").val())) {
$("#error-twitter").text('Twitter link is not valid.');
error = true;
} else {
$("#error-twitter").text('');
$("#twitter").removeClass("box_error");
}
}
// facebook
if ($("#facebook").val() == '') {
$("#error-facebook").text('Facebook link is required.');
$("#facebook").addClass("box_error");
error = true;
} else {
var facebookReg = /^(https?:\/\/)?(www\.)?facebook.com\/[a-zA-Z0-9(\.\?)?]/;
if (!facebookReg.test($("#facebook").val())) {
$("#error-facebook").text('Facebook link is not valid.');
error = true;
$("#facebook").addClass("box_error");
} else {
$("#error-facebook").text('');
}
}
// linkedin
if ($("#linkedin").val() == '') {
$("#error-linkedin").text('Linkedin link is required.');
$("#linkedin").addClass("box_error");
error = true;
} else {
var linkedinReg = /(ftp|http|https):\/\/?(?:www\.)?linkedin.com(\w+:{0,1}\w*@)?(\S+)(:([0-9])+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
if (!linkedinReg.test($("#linkedin").val())) {
$("#error-linkedin").text('Linkedin link is not valid.');
error = true;
} else {
$("#error-linkedin").text('');
$("#linkedin").removeClass("box_error");
}
}
if (!error) {
if (animation) return false;
animation = true;
current_slide = $(this).parent().parent();
next_slide = $(this).parent().parent().next();
$("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");
next_slide.show();
current_slide.animate({
opacity: 0
}, {
step: function(now, mx) {
scale = 1 - (1 - now) * 0.2;
left = (now * 50) + "%";
opacity = 1 - now;
current_slide.css({
'transform': 'scale(' + scale + ')'
});
next_slide.css({
'left': left,
'opacity': opacity
});
},
duration: 800,
complete: function() {
current_slide.hide();
animation = false;
},
easing: 'easeInOutBack'
});
}
});
// third step validation
$(".ts_next_btn").click(function() {
// first name
if ($("#fname").val() == '') {
$("#error-fname").text('Enter your First name.');
$("#fname").addClass("box_error");
error = true;
} else {
var fname = $("#fname").val();
if (fname != fname) {
$("#error-fname").text('First name is required.');
error = true;
} else {
$("#error-fname").text('');
error = false;
$("#fname").removeClass("box_error");
}
if ((fname.length <= 2) || (fname.length > 20)) {
$("#error-fname").text("User length must be between 2 and 20 Characters.");
error = true;
}
if (!isNaN(fname)) {
$("#error-fname").text("Only Characters are allowed.");
error = true;
} else {
$("#fname").removeClass("box_error");
}
}
// last name
if ($("#lname").val() == '') {
$("#error-lname").text('Enter your Last name.');
$("#lname").addClass("box_error");
error = true;
} else {
var lname = $("#lname").val();
if (lname != lname) {
$("#error-lname").text('Last name is required.');
error = true;
} else {
$("#error-lname").text('');
error = false;
}
if ((lname.length <= 2) || (lname.length > 20)) {
$("#error-lname").text("User length must be between 2 and 20 Characters.");
error = true;
}
if (!isNaN(lname)) {
$("#error-lname").text("Only Characters are allowed.");
error = true;
} else {
$("#lname").removeClass("box_error");
}
}
// phone
if ($("#phone").val() == '') {
$("#error-phone").text('Enter your Phone number.');
$("#phone").addClass("box_error");
error = true;
} else {
var phone = $("#phone").val();
if (phone != phone) {
$("#error-phone").text('Phone number is required.');
error = true;
} else {
$("#error-phone").text('');
error = false;
}
if (phone.length != 10) {
$("#error-phone").text("Mobile number must be of 10 Digits only.");
error = true;
} else {
$("#phone").removeClass("box_error");
}
}
// address
if ($("#address").val() == '') {
$("#error-address").text('Enter your Address.');
$("#address").addClass("box_error");
error = true;
} else {
var address = $("#address").val();
if (address != address) {
$("#error-address").text('Address is required.');
error = true;
} else {
$("#error-address").text('');
$("#address").removeClass("box_error");
error = false;
}
}
if (!error) {
if (animation) return false;
animation = true;
current_slide = $(this).parent().parent();
next_slide = $(this).parent().parent().next();
$("#progress_header li").eq($(".multistep-box").index(next_slide)).addClass("active");
next_slide.show();
current_slide.animate({
opacity: 0
}, {
step: function(now, mx) {
scale = 1 - (1 - now) * 0.2;
left = (now * 50) + "%";
opacity = 1 - now;
current_slide.css({
'transform': 'scale(' + scale + ')'
});
next_slide.css({
'left': left,
'opacity': opacity
});
},
duration: 800,
complete: function() {
current_slide.hide();
animation = false;
},
easing: 'easeInOutBack'
});
}
});
// previous
$(".previous").click(function() {
if (animation) return false;
animation = true;
current_slide = $(this).parent().parent();
previous_slide = $(this).parent().parent().prev();
$("#progress_header li").eq($(".multistep-box").index(current_slide)).removeClass("active");
previous_slide.show();
current_slide.animate({
opacity: 0
}, {
step: function(now, mx) {
scale = 0.8 + (1 - now) * 0.2;
left = ((1 - now) * 50) + "%";
opacity = 1 - now;
current_slide.css({
'left': left
});
previous_slide.css({
'transform': 'scale(' + scale + ')',
'opacity': opacity
});
},
duration: 800,
complete: function() {
current_slide.hide();
animation = false;
},
easing: 'easeInOutBack'
});
});
$(".submit_btn").click(function() {
if (!error){
$(".main").addClass("form_submited");
}
return false;
})
Output:
Original article source at: https://websolutionstuff.com/
1597014000
Google's Flutter 1.20 stable announced with new features - Navoki
Flutter Google cross-platform UI framework has released a new version 1.20 stable.
Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.
Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store. If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.
Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.
Here are the few key points of this release:
Performance improvements for Flutter and Dart
In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.
If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.
Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.
Autofill for mobile text fields
Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.
A new widget for interaction
InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.
Updated Material Slider, RangeSlider, TimePicker, and DatePicker
In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSlider, DatePicker with support for date range and time picker with the new style.
New pubspec.yaml format
Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.
Preview of embedded Dart DevTools in Visual Studio Code
Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.
Network tracking
The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.
Generate type-safe platform channels for platform interop
Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.
There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.
You can get more free Flutter tutorials you can follow these courses:
- Setup Flutter Desktop on Windows, Linux, MacOS using VSCode and Build – Flutter Tutorial
- Flutter Desktop Linux app | Build and Publish on Snapcraft Store
- Firebase Local Emulator Suite in Flutter
#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows
1598396940
What is Flutter and why you should learn it?
Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).
Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.
There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.
Flutter meaning?
What is Flutter? this question comes to many new developer’s mind.
Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.
So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.
Where Flutter is used?
Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are
Dream11
NuBank
Reflectly app
Abbey Road Studios
and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.
#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter
1644991598
The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.
In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.
🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️
Starter Project : https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App/tree/Episode1
► Timestamps
0:00 Intro 0:20
Upload Profile Screen
16:35 Image Picker
20:06 Image Cropper
24:25 Firestore Data Storage Configuration.
⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.
► Social Media
GitHub: https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App.git
LinkedIn: https://www.linkedin.com/in/roaring-r...
Twitter: https://twitter.com/roaringraaj
Facebook: https://www.facebook.com/flutterdartacademy
► Previous Episode : https://youtu.be/QnL3fr-XpC4
► Playlist: https://youtube.com/playlist?list=PL6vcAuTKAaYe_9KQRsxTsFFSx78g1OluK
I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.
⭐️Please comment your suggestion for my improvement.
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)
Hope you enjoyed this video!
If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj
LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)
https://youtu.be/F_GgZVD4sDk
#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter
1640672627
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
https://youtu.be/-tHUmjIkGJ4
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design
In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code.
In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter.
🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter
⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.
► Social Media
GitHub: https://github.com/Punithraaj
LinkedIn: https://www.linkedin.com/in/roaring-r...
Twitter: https://twitter.com/roaringraaj
Facebook: https://www.facebook.com/flutterdartacademy
I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj
#flutter riverpod #flutter travel app #appointment app flutter #morioh