1678894320
Cómo cambiar el tamaño y comprimir imágenes usando JavaScript
En este tutorial, aprenderemos cómo cambiar el tamaño y comprimir imágenes usando HTML CSS y JavaScript. En esta herramienta de cambio de tamaño de imagen, el usuario puede cargar una imagen y cambiar el tamaño de sus dimensiones o comprimir su tamaño reduciendo la calidad de la imagen.
archivo HTML
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="style.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="script.js" defer></script>
</head>
<body>
<div class="wrapper">
<div class="upload-box">
<input type="file" accept="image/*" hidden>
<img src="https://www.codingnepalweb.com/demos/resize-and-compress-image-javascript/upload-icon.svg" alt="">
<p>Browse File to Upload</p>
</div>
<div class="content">
<div class="row sizes">
<div class="column width">
<label>Width</label>
<input type="number">
</div>
<div class="column height">
<label>Height</label>
<input type="number">
</div>
</div>
<div class="row checkboxes">
<div class="column ratio">
<input type="checkbox" id="ratio" checked>
<label for="ratio">Lock aspect ratio</label>
</div>
<div class="column quality">
<input type="checkbox" id="quality">
<label for="quality">Reduce quality</label>
</div>
</div>
<button class="download-btn">Download Image</button>
</div>
</div>
</body>
</html>Archivo CSS
/* Import Google font - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
body{
display: flex;
align-items: center;
justify-content: center;
min-height: 100vh;
background: #927DFC;
}
.wrapper{
width: 450px;
height: 288px;
padding: 30px;
background: #fff;
border-radius: 9px;
transition: height 0.2s ease;
}
.wrapper.active{
height: 537px;
}
.wrapper .upload-box{
height: 225px;
display: flex;
cursor: pointer;
align-items: center;
justify-content: center;
flex-direction: column;
border-radius: 5px;
border: 2px dashed #afafaf;
}
.wrapper.active .upload-box{
border: none;
}
.upload-box p{
font-size: 1.06rem;
margin-top: 20px;
}
.wrapper.active .upload-box p{
display: none;
}
.wrapper.active .upload-box img{
width: 100%;
height: 100%;
object-fit: cover;
border-radius: 5px;
}
.wrapper .content{
opacity: 0;
margin-top: 28px;
pointer-events: none;
}
.wrapper.active .content{
opacity: 1;
pointer-events: auto;
transition: opacity 0.5s 0.05s ease;
}
.content .row{
display: flex;
justify-content: space-between;
}
.content .row .column{
width: calc(100% / 2 - 15px);
}
.row .column label{
font-size: 1.06rem;
}
.sizes .column input{
width: 100%;
height: 49px;
outline: none;
margin-top: 7px;
padding: 0 15px;
font-size: 1.06rem;
border-radius: 4px;
border: 1px solid #aaa;
}
.sizes .column input:focus{
padding: 0 14px;
border: 2px solid #927DFC;
}
.content .checkboxes{
margin-top: 20px;
}
.checkboxes .column{
display: flex;
align-items: center;
}
.checkboxes .column input{
width: 17px;
height: 17px;
margin-right: 9px;
accent-color: #927DFC;
}
.content .download-btn{
width: 100%;
color: #fff;
outline: none;
border: none;
cursor: pointer;
font-size: 1.06rem;
border-radius: 5px;
padding: 15px 0;
margin: 30px 0 10px;
background: #927DFC;
text-transform: uppercase;
}Archivo JavaScript
const uploadBox = document.querySelector(".upload-box"),
previewImg = uploadBox.querySelector("img"),
fileInput = uploadBox.querySelector("input"),
widthInput = document.querySelector(".width input"),
heightInput = document.querySelector(".height input"),
ratioInput = document.querySelector(".ratio input"),
qualityInput = document.querySelector(".quality input"),
downloadBtn = document.querySelector(".download-btn");
let ogImageRatio;
const loadFile = (e) => {
const file = e.target.files[0]; // getting first user selected file
if(!file) return; // return if user hasn't selected any file
previewImg.src = URL.createObjectURL(file); // passing selected file url to preview img src
previewImg.addEventListener("load", () => { // once img loaded
widthInput.value = previewImg.naturalWidth;
heightInput.value = previewImg.naturalHeight;
ogImageRatio = previewImg.naturalWidth / previewImg.naturalHeight;
document.querySelector(".wrapper").classList.add("active");
});
}
widthInput.addEventListener("keyup", () => {
// getting height according to the ratio checkbox status
const height = ratioInput.checked ? widthInput.value / ogImageRatio : heightInput.value;
heightInput.value = Math.floor(height);
});
heightInput.addEventListener("keyup", () => {
// getting width according to the ratio checkbox status
const width = ratioInput.checked ? heightInput.value * ogImageRatio : widthInput.value;
widthInput.value = Math.floor(width);
});
const resizeAndDownload = () => {
const canvas = document.createElement("canvas");
const a = document.createElement("a");
const ctx = canvas.getContext("2d");
// if quality checkbox is checked, pass 0.5 to imgQuality else pass 1.0
// 1.0 is 100% quality where 0.5 is 50% of total. you can pass from 0.1 - 1.0
const imgQuality = qualityInput.checked ? 0.5 : 1.0;
// setting canvas height & width according to the input values
canvas.width = widthInput.value;
canvas.height = heightInput.value;
// drawing user selected image onto the canvas
ctx.drawImage(previewImg, 0, 0, canvas.width, canvas.height);
// passing canvas data url as href value of <a> element
a.href = canvas.toDataURL("image/jpeg", imgQuality);
a.download = new Date().getTime(); // passing current time as download value
a.click(); // clicking <a> element so the file download
}
downloadBtn.addEventListener("click", resizeAndDownload);
fileInput.addEventListener("change", loadFile);
uploadBox.addEventListener("click", () => fileInput.click());What is GEEK
Buddha Community
1640196000
Transfiere reportes de ShadowServer hacia Azure Blob Storage
Transfiere reportes de ShadowServer hacia Azure Blob Storage
Script para transferir reportes del ShadowServer REST API hacia Azure Blob Storage, en formato CSV.
Requerimientos:
Como ejecutar:
Ejecute:
python3 -m venv env
En Windows, corra:
env\Scripts\activate.bat
En Unix o MacOS, corra:
source env/bin/activate
Luego ejecute:
pip install -r requirements.txt
Finalmente:
python3 app.py
Configuración:
AZURE_ACC_KEY = ... #Cambiar a la llave de cuenta correspondiente.
AZURE_ACC_NAME = ... #Cambiar al nombre de cuenta correspondiente.
container_name = ... #Cambiar al nombre de blob container correspondiente.
AUTH_DETAILS = {
'user': "", #Cambiar como sea conveniente.
'password': "", #Cambiar como sea conveniente.
'login':'Login'
}
Referencias:
https://docs.microsoft.com/en-us/python/api/overview/azure/storage-blob-readme?view=azure-python
Author: csirt-rd
Source Code: https://github.com/csirt-rd/Shadowserver-to-Azure-Blob-Storage
#azure #azureblobstorage
1678894320
Cómo cambiar el tamaño y comprimir imágenes usando JavaScript
En este tutorial, aprenderemos cómo cambiar el tamaño y comprimir imágenes usando HTML CSS y JavaScript. En esta herramienta de cambio de tamaño de imagen, el usuario puede cargar una imagen y cambiar el tamaño de sus dimensiones o comprimir su tamaño reduciendo la calidad de la imagen.
archivo HTML
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="style.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="script.js" defer></script>
</head>
<body>
<div class="wrapper">
<div class="upload-box">
<input type="file" accept="image/*" hidden>
<img src="https://www.codingnepalweb.com/demos/resize-and-compress-image-javascript/upload-icon.svg" alt="">
<p>Browse File to Upload</p>
</div>
<div class="content">
<div class="row sizes">
<div class="column width">
<label>Width</label>
<input type="number">
</div>
<div class="column height">
<label>Height</label>
<input type="number">
</div>
</div>
<div class="row checkboxes">
<div class="column ratio">
<input type="checkbox" id="ratio" checked>
<label for="ratio">Lock aspect ratio</label>
</div>
<div class="column quality">
<input type="checkbox" id="quality">
<label for="quality">Reduce quality</label>
</div>
</div>
<button class="download-btn">Download Image</button>
</div>
</div>
</body>
</html>Archivo CSS
/* Import Google font - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
body{
display: flex;
align-items: center;
justify-content: center;
min-height: 100vh;
background: #927DFC;
}
.wrapper{
width: 450px;
height: 288px;
padding: 30px;
background: #fff;
border-radius: 9px;
transition: height 0.2s ease;
}
.wrapper.active{
height: 537px;
}
.wrapper .upload-box{
height: 225px;
display: flex;
cursor: pointer;
align-items: center;
justify-content: center;
flex-direction: column;
border-radius: 5px;
border: 2px dashed #afafaf;
}
.wrapper.active .upload-box{
border: none;
}
.upload-box p{
font-size: 1.06rem;
margin-top: 20px;
}
.wrapper.active .upload-box p{
display: none;
}
.wrapper.active .upload-box img{
width: 100%;
height: 100%;
object-fit: cover;
border-radius: 5px;
}
.wrapper .content{
opacity: 0;
margin-top: 28px;
pointer-events: none;
}
.wrapper.active .content{
opacity: 1;
pointer-events: auto;
transition: opacity 0.5s 0.05s ease;
}
.content .row{
display: flex;
justify-content: space-between;
}
.content .row .column{
width: calc(100% / 2 - 15px);
}
.row .column label{
font-size: 1.06rem;
}
.sizes .column input{
width: 100%;
height: 49px;
outline: none;
margin-top: 7px;
padding: 0 15px;
font-size: 1.06rem;
border-radius: 4px;
border: 1px solid #aaa;
}
.sizes .column input:focus{
padding: 0 14px;
border: 2px solid #927DFC;
}
.content .checkboxes{
margin-top: 20px;
}
.checkboxes .column{
display: flex;
align-items: center;
}
.checkboxes .column input{
width: 17px;
height: 17px;
margin-right: 9px;
accent-color: #927DFC;
}
.content .download-btn{
width: 100%;
color: #fff;
outline: none;
border: none;
cursor: pointer;
font-size: 1.06rem;
border-radius: 5px;
padding: 15px 0;
margin: 30px 0 10px;
background: #927DFC;
text-transform: uppercase;
}Archivo JavaScript
const uploadBox = document.querySelector(".upload-box"),
previewImg = uploadBox.querySelector("img"),
fileInput = uploadBox.querySelector("input"),
widthInput = document.querySelector(".width input"),
heightInput = document.querySelector(".height input"),
ratioInput = document.querySelector(".ratio input"),
qualityInput = document.querySelector(".quality input"),
downloadBtn = document.querySelector(".download-btn");
let ogImageRatio;
const loadFile = (e) => {
const file = e.target.files[0]; // getting first user selected file
if(!file) return; // return if user hasn't selected any file
previewImg.src = URL.createObjectURL(file); // passing selected file url to preview img src
previewImg.addEventListener("load", () => { // once img loaded
widthInput.value = previewImg.naturalWidth;
heightInput.value = previewImg.naturalHeight;
ogImageRatio = previewImg.naturalWidth / previewImg.naturalHeight;
document.querySelector(".wrapper").classList.add("active");
});
}
widthInput.addEventListener("keyup", () => {
// getting height according to the ratio checkbox status
const height = ratioInput.checked ? widthInput.value / ogImageRatio : heightInput.value;
heightInput.value = Math.floor(height);
});
heightInput.addEventListener("keyup", () => {
// getting width according to the ratio checkbox status
const width = ratioInput.checked ? heightInput.value * ogImageRatio : widthInput.value;
widthInput.value = Math.floor(width);
});
const resizeAndDownload = () => {
const canvas = document.createElement("canvas");
const a = document.createElement("a");
const ctx = canvas.getContext("2d");
// if quality checkbox is checked, pass 0.5 to imgQuality else pass 1.0
// 1.0 is 100% quality where 0.5 is 50% of total. you can pass from 0.1 - 1.0
const imgQuality = qualityInput.checked ? 0.5 : 1.0;
// setting canvas height & width according to the input values
canvas.width = widthInput.value;
canvas.height = heightInput.value;
// drawing user selected image onto the canvas
ctx.drawImage(previewImg, 0, 0, canvas.width, canvas.height);
// passing canvas data url as href value of <a> element
a.href = canvas.toDataURL("image/jpeg", imgQuality);
a.download = new Date().getTime(); // passing current time as download value
a.click(); // clicking <a> element so the file download
}
downloadBtn.addEventListener("click", resizeAndDownload);
fileInput.addEventListener("change", loadFile);
uploadBox.addEventListener("click", () => fileInput.click());1622207074
What is JavaScript - Stackfindover - Blog
Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.
Who invented JavaScript?
JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.
What is JavaScript?
JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.
Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.
JavaScript Hello World Program
In JavaScript, ‘document.write‘ is used to represent a string on a browser.
<script type="text/javascript">
document.write("Hello World!");
</script>
How to comment JavaScript code?
- For single line comment in JavaScript we have to use // (double slashes)
- For multiple line comments we have to use / * – – * /
<script type="text/javascript">
//single line comment
/* document.write("Hello"); */
</script>
Advantages and Disadvantages of JavaScript
#javascript #javascript code #javascript hello world #what is javascript #who invented javascript
1616670795
Hire Dedicated JavaScript Developers -Hire JavaScript Developers
It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.
Does your business need an interactive website or app?
Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.
The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.
Get your business app with JavaScript
For more inquiry click here https://bit.ly/31eZyDZ
Book Free Interview: https://bit.ly/3dDShFg
#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers
1589255577
The essential JavaScript concepts that you should understand
As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.
#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips