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EasyMDE: Simple, Beautiful and Embeddable JavaScript Markdown Editor

EasyMDE - Markdown Editor 

This repository is a fork of SimpleMDE, made by Sparksuite. Go to the dedicated section for more information.

A drop-in JavaScript text area replacement for writing beautiful and understandable Markdown. EasyMDE allows users who may be less experienced with Markdown to use familiar toolbar buttons and shortcuts.

In addition, the syntax is rendered while editing to clearly show the expected result. Headings are larger, emphasized words are italicized, links are underlined, etc.

EasyMDE also features both built-in auto saving and spell checking. The editor is entirely customizable, from theming to toolbar buttons and javascript hooks.

Try the demo

Quick access

• EasyMDE - Markdown Editor
  • Quick access
  • Install EasyMDE
  • How to use
    • Loading the editor
    • Editor functions
  • Configuration
    • Options list
    • Options example
    • Toolbar icons
    • Toolbar customization
    • Keyboard shortcuts
  • Advanced use
    • Event handling
    • Removing EasyMDE from text area
    • Useful methods
  • How it works
  • SimpleMDE fork
  • Hacking EasyMDE
  • Contributing
  • License

Install EasyMDE

Via npm:

npm install easymde

Via the UNPKG CDN:

<link rel="stylesheet" href="https://unpkg.com/easymde/dist/easymde.min.css">
<script src="https://unpkg.com/easymde/dist/easymde.min.js"></script>

Or jsDelivr:

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.css">
<script src="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.js"></script>

How to use

Loading the editor

After installing and/or importing the module, you can load EasyMDE onto the first textarea element on the web page:

<textarea></textarea>
<script>
const easyMDE = new EasyMDE();
</script>

Alternatively you can select a specific textarea, via JavaScript:

<textarea id="my-text-area"></textarea>
<script>
const easyMDE = new EasyMDE({element: document.getElementById('my-text-area')});
</script>

Editor functions

Use easyMDE.value() to get the content of the editor:

<script>
easyMDE.value();
</script>

Use easyMDE.value(val) to set the content of the editor:

<script>
easyMDE.value('New input for **EasyMDE**');
</script>

Configuration

Options list

• autoDownloadFontAwesome: If set to true, force downloads Font Awesome (used for icons). If set to false, prevents downloading. Defaults to undefined, which will intelligently check whether Font Awesome has already been included, then download accordingly.
• autofocus: If set to true, focuses the editor automatically. Defaults to false.
• autosave: Saves the text that's being written and will load it back in the future. It will forget the text when the form it's contained in is submitted.
  • enabled: If set to true, saves the text automatically. Defaults to false.
  • delay: Delay between saves, in milliseconds. Defaults to 10000 (10 seconds).
  • submit_delay: Delay before assuming that submit of the form failed and saving the text, in milliseconds. Defaults to autosave.delay or 10000 (10 seconds).
  • uniqueId: You must set a unique string identifier so that EasyMDE can autosave. Something that separates this from other instances of EasyMDE elsewhere on your website.
  • timeFormat: Set DateTimeFormat. More information see DateTimeFormat instances. Default locale: en-US, format: hour:minute.
  • text: Set text for autosave.
• autoRefresh: Useful, when initializing the editor in a hidden DOM node. If set to { delay: 300 }, it will check every 300 ms if the editor is visible and if positive, call CodeMirror's refresh().
• blockStyles: Customize how certain buttons that style blocks of text behave.
  • bold: Can be set to ** or __. Defaults to **.
  • code: Can be set to ``` or ~~~. Defaults to ```.
  • italic: Can be set to * or _. Defaults to *.
• unorderedListStyle: can be *, - or +. Defaults to *.
• scrollbarStyle: Chooses a scrollbar implementation. The default is "native", showing native scrollbars. The core library also provides the "null" style, which completely hides the scrollbars. Addons can implement additional scrollbar models.
• element: The DOM element for the textarea element to use. Defaults to the first textarea element on the page.
• forceSync: If set to true, force text changes made in EasyMDE to be immediately stored in original text area. Defaults to false.
• hideIcons: An array of icon names to hide. Can be used to hide specific icons shown by default without completely customizing the toolbar.
• indentWithTabs: If set to false, indent using spaces instead of tabs. Defaults to true.
• initialValue: If set, will customize the initial value of the editor.
• previewImagesInEditor: - EasyMDE will show preview of images, false by default, preview for images will appear only for images on separate lines.
• imagesPreviewHandler: - A custom function for handling the preview of images. Takes the parsed string between the parantheses of the image markdown ![]( ) as argument and returns a string that serves as the src attribute of the <img> tag in the preview. Enables dynamic previewing of images in the frontend without having to upload them to a server, allows copy-pasting of images to the editor with preview.
• insertTexts: Customize how certain buttons that insert text behave. Takes an array with two elements. The first element will be the text inserted before the cursor or highlight, and the second element will be inserted after. For example, this is the default link value: ["[", "](http://)"].
  • horizontalRule
  • image
  • link
  • table
• lineNumbers: If set to true, enables line numbers in the editor.
• lineWrapping: If set to false, disable line wrapping. Defaults to true.
• minHeight: Sets the minimum height for the composition area, before it starts auto-growing. Should be a string containing a valid CSS value like "500px". Defaults to "300px".
• maxHeight: Sets fixed height for the composition area. minHeight option will be ignored. Should be a string containing a valid CSS value like "500px". Defaults to undefined.
• onToggleFullScreen: A function that gets called when the editor's full screen mode is toggled. The function will be passed a boolean as parameter, true when the editor is currently going into full screen mode, or false.
• parsingConfig: Adjust settings for parsing the Markdown during editing (not previewing).
  • allowAtxHeaderWithoutSpace: If set to true, will render headers without a space after the #. Defaults to false.
  • strikethrough: If set to false, will not process GFM strikethrough syntax. Defaults to true.
  • underscoresBreakWords: If set to true, let underscores be a delimiter for separating words. Defaults to false.
• overlayMode: Pass a custom codemirror overlay mode to parse and style the Markdown during editing.
  • mode: A codemirror mode object.
  • combine: If set to false, will replace CSS classes returned by the default Markdown mode. Otherwise the classes returned by the custom mode will be combined with the classes returned by the default mode. Defaults to true.
• placeholder: If set, displays a custom placeholder message.
• previewClass: A string or array of strings that will be applied to the preview screen when activated. Defaults to "editor-preview".
• previewRender: Custom function for parsing the plaintext Markdown and returning HTML. Used when user previews.
• promptURLs: If set to true, a JS alert window appears asking for the link or image URL. Defaults to false.
• promptTexts: Customize the text used to prompt for URLs.
  • image: The text to use when prompting for an image's URL. Defaults to URL of the image:.
  • link: The text to use when prompting for a link's URL. Defaults to URL for the link:.
• uploadImage: If set to true, enables the image upload functionality, which can be triggered by drag and drop, copy-paste and through the browse-file window (opened when the user click on the upload-image icon). Defaults to false.
• imageMaxSize: Maximum image size in bytes, checked before upload (note: never trust client, always check the image size at server-side). Defaults to 1024 * 1024 * 2 (2 MB).
• imageAccept: A comma-separated list of mime-types used to check image type before upload (note: never trust client, always check file types at server-side). Defaults to image/png, image/jpeg.
• imageUploadFunction: A custom function for handling the image upload. Using this function will render the options imageMaxSize, imageAccept, imageUploadEndpoint and imageCSRFToken ineffective.
  • The function gets a file and onSuccess and onError callback functions as parameters. onSuccess(imageUrl: string) and onError(errorMessage: string)
• imageUploadEndpoint: The endpoint where the images data will be sent, via an asynchronous POST request. The server is supposed to save this image, and return a JSON response.
  • if the request was successfully processed (HTTP 200 OK): {"data": {"filePath": "<filePath>"}} where filePath is the path of the image (absolute if imagePathAbsolute is set to true, relative if otherwise);
  • otherwise: {"error": "<errorCode>"}, where errorCode can be noFileGiven (HTTP 400 Bad Request), typeNotAllowed (HTTP 415 Unsupported Media Type), fileTooLarge (HTTP 413 Payload Too Large) or importError (see errorMessages below). If errorCode is not one of the errorMessages, it is alerted unchanged to the user. This allows for server-side error messages. No default value.
• imagePathAbsolute: If set to true, will treat imageUrl from imageUploadFunction and filePath returned from imageUploadEndpoint as an absolute rather than relative path, i.e. not prepend window.location.origin to it.
• imageCSRFToken: CSRF token to include with AJAX call to upload image. For various instances like Django, Spring and Laravel.
• imageCSRFName: CSRF token filed name to include with AJAX call to upload image, applied when imageCSRFToken has value, defaults to csrfmiddlewaretoken.
• imageCSRFHeader: If set to true, passing CSRF token via header. Defaults to false, which pass CSRF through request body.
• imageTexts: Texts displayed to the user (mainly on the status bar) for the import image feature, where #image_name#, #image_size# and #image_max_size# will replaced by their respective values, that can be used for customization or internationalization:
  • sbInit: Status message displayed initially if uploadImage is set to true. Defaults to Attach files by drag and dropping or pasting from clipboard..
  • sbOnDragEnter: Status message displayed when the user drags a file to the text area. Defaults to Drop image to upload it..
  • sbOnDrop: Status message displayed when the user drops a file in the text area. Defaults to Uploading images #images_names#.
  • sbProgress: Status message displayed to show uploading progress. Defaults to Uploading #file_name#: #progress#%.
  • sbOnUploaded: Status message displayed when the image has been uploaded. Defaults to Uploaded #image_name#.
  • sizeUnits: A comma-separated list of units used to display messages with human-readable file sizes. Defaults to B, KB, MB (example: 218 KB). You can use B,KB,MB instead if you prefer without whitespaces (218KB).
• errorMessages: Errors displayed to the user, using the errorCallback option, where #image_name#, #image_size# and #image_max_size# will replaced by their respective values, that can be used for customization or internationalization:
  • noFileGiven: The server did not receive any file from the user. Defaults to You must select a file..
  • typeNotAllowed: The user send a file type which doesn't match the imageAccept list, or the server returned this error code. Defaults to This image type is not allowed..
  • fileTooLarge: The size of the image being imported is bigger than the imageMaxSize, or if the server returned this error code. Defaults to Image #image_name# is too big (#image_size#).\nMaximum file size is #image_max_size#..
  • importError: An unexpected error occurred when uploading the image. Defaults to Something went wrong when uploading the image #image_name#..
• errorCallback: A callback function used to define how to display an error message. Defaults to (errorMessage) => alert(errorMessage).
• renderingConfig: Adjust settings for parsing the Markdown during previewing (not editing).
  • codeSyntaxHighlighting: If set to true, will highlight using highlight.js. Defaults to false. To use this feature you must include highlight.js on your page or pass in using the hljs option. For example, include the script and the CSS files like:
    <script src="https://cdn.jsdelivr.net/highlight.js/latest/highlight.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/highlight.js/latest/styles/github.min.css">
  • hljs: An injectible instance of highlight.js. If you don't want to rely on the global namespace (window.hljs), you can provide an instance here. Defaults to undefined.
  • markedOptions: Set the internal Markdown renderer's options. Other renderingConfig options will take precedence.
  • singleLineBreaks: If set to false, disable parsing GitHub Flavored Markdown (GFM) single line breaks. Defaults to true.
  • sanitizerFunction: Custom function for sanitizing the HTML output of Markdown renderer.
• shortcuts: Keyboard shortcuts associated with this instance. Defaults to the array of shortcuts.
• showIcons: An array of icon names to show. Can be used to show specific icons hidden by default without completely customizing the toolbar.
• spellChecker: If set to false, disable the spell checker. Defaults to true. Optionally pass a CodeMirrorSpellChecker-compliant function.
• inputStyle: textarea or contenteditable. Defaults to textarea for desktop and contenteditable for mobile. contenteditable option is necessary to enable nativeSpellcheck.
• nativeSpellcheck: If set to false, disable native spell checker. Defaults to true.
• sideBySideFullscreen: If set to false, allows side-by-side editing without going into fullscreen. Defaults to true.
• status: If set to false, hide the status bar. Defaults to the array of built-in status bar items.
  • Optionally, you can set an array of status bar items to include, and in what order. You can even define your own custom status bar items.
• styleSelectedText: If set to false, remove the CodeMirror-selectedtext class from selected lines. Defaults to true.
• syncSideBySidePreviewScroll: If set to false, disable syncing scroll in side by side mode. Defaults to true.
• tabSize: If set, customize the tab size. Defaults to 2.
• theme: Override the theme. Defaults to easymde.
• toolbar: If set to false, hide the toolbar. Defaults to the array of icons.
• toolbarTips: If set to false, disable toolbar button tips. Defaults to true.
• direction: rtl or ltr. Changes text direction to support right-to-left languages. Defaults to ltr.

Options example

Most options demonstrate the non-default behavior:

const editor = new EasyMDE({
    autofocus: true,
    autosave: {
        enabled: true,
        uniqueId: "MyUniqueID",
        delay: 1000,
        submit_delay: 5000,
        timeFormat: {
            locale: 'en-US',
            format: {
                year: 'numeric',
                month: 'long',
                day: '2-digit',
                hour: '2-digit',
                minute: '2-digit',
            },
        },
        text: "Autosaved: "
    },
    blockStyles: {
        bold: "__",
        italic: "_",
    },
    unorderedListStyle: "-",
    element: document.getElementById("MyID"),
    forceSync: true,
    hideIcons: ["guide", "heading"],
    indentWithTabs: false,
    initialValue: "Hello world!",
    insertTexts: {
        horizontalRule: ["", "\n\n-----\n\n"],
        image: ["![](http://", ")"],
        link: ["[", "](https://)"],
        table: ["", "\n\n| Column 1 | Column 2 | Column 3 |\n| -------- | -------- | -------- |\n| Text     | Text      | Text     |\n\n"],
    },
    lineWrapping: false,
    minHeight: "500px",
    parsingConfig: {
        allowAtxHeaderWithoutSpace: true,
        strikethrough: false,
        underscoresBreakWords: true,
    },
    placeholder: "Type here...",

    previewClass: "my-custom-styling",
    previewClass: ["my-custom-styling", "more-custom-styling"],

    previewRender: (plainText) => customMarkdownParser(plainText), // Returns HTML from a custom parser
    previewRender: (plainText, preview) => { // Async method
        setTimeout(() => {
            preview.innerHTML = customMarkdownParser(plainText);
        }, 250);

        return "Loading...";
    },
    promptURLs: true,
    promptTexts: {
        image: "Custom prompt for URL:",
        link: "Custom prompt for URL:",
    },
    renderingConfig: {
        singleLineBreaks: false,
        codeSyntaxHighlighting: true,
        sanitizerFunction: (renderedHTML) => {
            // Using DOMPurify and only allowing <b> tags
            return DOMPurify.sanitize(renderedHTML, {ALLOWED_TAGS: ['b']})
        },
    },
    shortcuts: {
        drawTable: "Cmd-Alt-T"
    },
    showIcons: ["code", "table"],
    spellChecker: false,
    status: false,
    status: ["autosave", "lines", "words", "cursor"], // Optional usage
    status: ["autosave", "lines", "words", "cursor", {
        className: "keystrokes",
        defaultValue: (el) => {
            el.setAttribute('data-keystrokes', 0);
        },
        onUpdate: (el) => {
            const keystrokes = Number(el.getAttribute('data-keystrokes')) + 1;
            el.innerHTML = `${keystrokes} Keystrokes`;
            el.setAttribute('data-keystrokes', keystrokes);
        },
    }], // Another optional usage, with a custom status bar item that counts keystrokes
    styleSelectedText: false,
    sideBySideFullscreen: false,
    syncSideBySidePreviewScroll: false,
    tabSize: 4,
    toolbar: false,
    toolbarTips: false,
});

Toolbar icons

Below are the built-in toolbar icons (only some of which are enabled by default), which can be reorganized however you like. "Name" is the name of the icon, referenced in the JavaScript. "Action" is either a function or a URL to open. "Class" is the class given to the icon. "Tooltip" is the small tooltip that appears via the title="" attribute. Note that shortcut hints are added automatically and reflect the specified action if it has a key bind assigned to it (i.e. with the value of action set to bold and that of tooltip set to Bold, the final text the user will see would be "Bold (Ctrl-B)").

Additionally, you can add a separator between any icons by adding "|" to the toolbar array.

Name	Action	Tooltip Class
bold	toggleBold	Bold fa fa-bold
italic	toggleItalic	Italic fa fa-italic
strikethrough	toggleStrikethrough	Strikethrough fa fa-strikethrough
heading	toggleHeadingSmaller	Heading fa fa-header
heading-smaller	toggleHeadingSmaller	Smaller Heading fa fa-header
heading-bigger	toggleHeadingBigger	Bigger Heading fa fa-lg fa-header
heading-1	toggleHeading1	Big Heading fa fa-header header-1
heading-2	toggleHeading2	Medium Heading fa fa-header header-2
heading-3	toggleHeading3	Small Heading fa fa-header header-3
code	toggleCodeBlock	Code fa fa-code
quote	toggleBlockquote	Quote fa fa-quote-left
unordered-list	toggleUnorderedList	Generic List fa fa-list-ul
ordered-list	toggleOrderedList	Numbered List fa fa-list-ol
clean-block	cleanBlock	Clean block fa fa-eraser
link	drawLink	Create Link fa fa-link
image	drawImage	Insert Image fa fa-picture-o
table	drawTable	Insert Table fa fa-table
horizontal-rule	drawHorizontalRule	Insert Horizontal Line fa fa-minus
preview	togglePreview	Toggle Preview fa fa-eye no-disable
side-by-side	toggleSideBySide	Toggle Side by Side fa fa-columns no-disable no-mobile
fullscreen	toggleFullScreen	Toggle Fullscreen fa fa-arrows-alt no-disable no-mobile
guide	This link	Markdown Guide fa fa-question-circle
undo	undo	Undo fa fa-undo
redo	redo	Redo fa fa-redo

Toolbar customization

Customize the toolbar using the toolbar option.

Only the order of existing buttons:

const easyMDE = new EasyMDE({
    toolbar: ["bold", "italic", "heading", "|", "quote"]
});

All information and/or add your own icons

const easyMDE = new EasyMDE({
    toolbar: [
        {
            name: "bold",
            action: EasyMDE.toggleBold,
            className: "fa fa-bold",
            title: "Bold",
        },
        "italics", // shortcut to pre-made button
        {
            name: "custom",
            action: (editor) => {
                // Add your own code
            },
            className: "fa fa-star",
            title: "Custom Button",
            attributes: { // for custom attributes
                id: "custom-id",
                "data-value": "custom value" // HTML5 data-* attributes need to be enclosed in quotation marks ("") because of the dash (-) in its name.
            }
        },
        "|" // Separator
        // [, ...]
    ]
});

Put some buttons on dropdown menu

const easyMDE = new EasyMDE({
    toolbar: [{
                name: "heading",
                action: EasyMDE.toggleHeadingSmaller,
                className: "fa fa-header",
                title: "Headers",
            },
            "|",
            {
                name: "others",
                className: "fa fa-blind",
                title: "others buttons",
                children: [
                    {
                        name: "image",
                        action: EasyMDE.drawImage,
                        className: "fa fa-picture-o",
                        title: "Image",
                    },
                    {
                        name: "quote",
                        action: EasyMDE.toggleBlockquote,
                        className: "fa fa-percent",
                        title: "Quote",
                    },
                    {
                        name: "link",
                        action: EasyMDE.drawLink,
                        className: "fa fa-link",
                        title: "Link",
                    }
                ]
            },
        // [, ...]
    ]
});

Keyboard shortcuts

EasyMDE comes with an array of predefined keyboard shortcuts, but they can be altered with a configuration option. The list of default ones is as follows:

Shortcut (Windows / Linux)	Shortcut (macOS)	Action
Ctrl-'	Cmd-'	"toggleBlockquote"
Ctrl-B	Cmd-B	"toggleBold"
Ctrl-E	Cmd-E	"cleanBlock"
Ctrl-H	Cmd-H	"toggleHeadingSmaller"
Ctrl-I	Cmd-I	"toggleItalic"
Ctrl-K	Cmd-K	"drawLink"
Ctrl-L	Cmd-L	"toggleUnorderedList"
Ctrl-P	Cmd-P	"togglePreview"
Ctrl-Alt-C	Cmd-Alt-C	"toggleCodeBlock"
Ctrl-Alt-I	Cmd-Alt-I	"drawImage"
Ctrl-Alt-L	Cmd-Alt-L	"toggleOrderedList"
Shift-Ctrl-H	Shift-Cmd-H	"toggleHeadingBigger"
F9	F9	"toggleSideBySide"
F11	F11	"toggleFullScreen"

Here is how you can change a few, while leaving others untouched:

const editor = new EasyMDE({
    shortcuts: {
        "toggleOrderedList": "Ctrl-Alt-K", // alter the shortcut for toggleOrderedList
        "toggleCodeBlock": null, // unbind Ctrl-Alt-C
        "drawTable": "Cmd-Alt-T", // bind Cmd-Alt-T to drawTable action, which doesn't come with a default shortcut
    }
});

Shortcuts are automatically converted between platforms. If you define a shortcut as "Cmd-B", on PC that shortcut will be changed to "Ctrl-B". Conversely, a shortcut defined as "Ctrl-B" will become "Cmd-B" for Mac users.

The list of actions that can be bound is the same as the list of built-in actions available for toolbar buttons.

Advanced use

Event handling

You can catch the following list of events: https://codemirror.net/doc/manual.html#events

const easyMDE = new EasyMDE();
easyMDE.codemirror.on("change", () => {
    console.log(easyMDE.value());
});

Removing EasyMDE from text area

You can revert to the initial text area by calling the toTextArea method. Note that this clears up the autosave (if enabled) associated with it. The text area will retain any text from the destroyed EasyMDE instance.

const easyMDE = new EasyMDE();
// ...
easyMDE.toTextArea();
easyMDE = null;

If you need to remove registered event listeners (when the editor is not needed anymore), call easyMDE.cleanup().

Useful methods

The following self-explanatory methods may be of use while developing with EasyMDE.

const easyMDE = new EasyMDE();
easyMDE.isPreviewActive(); // returns boolean
easyMDE.isSideBySideActive(); // returns boolean
easyMDE.isFullscreenActive(); // returns boolean
easyMDE.clearAutosavedValue(); // no returned value

How it works

EasyMDE is a continuation of SimpleMDE.

SimpleMDE began as an improvement of lepture's Editor project, but has now taken on an identity of its own. It is bundled with CodeMirror and depends on Font Awesome.

CodeMirror is the backbone of the project and parses much of the Markdown syntax as it's being written. This allows us to add styles to the Markdown that's being written. Additionally, a toolbar and status bar have been added to the top and bottom, respectively. Previews are rendered by Marked using GitHub Flavored Markdown (GFM).

SimpleMDE fork

I originally made this fork to implement FontAwesome 5 compatibility into SimpleMDE. When that was done I submitted a pull request, which has not been accepted yet. This, and the project being inactive since May 2017, triggered me to make more changes and try to put new life into the project.

Changes include:

• FontAwesome 5 compatibility
• Guide button works when editor is in preview mode
• Links are now https:// by default
• Small styling changes
• Support for Node 8 and beyond
• Lots of refactored code
• Links in preview will open in a new tab by default
• TypeScript support

My intention is to continue development on this project, improving it and keeping it alive.

Hacking EasyMDE

You may want to edit this library to adapt its behavior to your needs. This can be done in some quick steps:

1. Follow the prerequisites and installation instructions in the contribution guide;
2. Do your changes;
3. Run gulp command, which will generate files: dist/easymde.min.css and dist/easymde.min.js;
4. Copy-paste those files to your code base, and you are done.

Contributing

Want to contribute to EasyMDE? Thank you! We have a contribution guide just for you!

---

Author: Ionaru
Source Code: https://github.com/Ionaru/easy-markdown-editor
License: MIT license

#react-native #react 

Drag and Drop File Upload with HTML, CSS and JavaScript

In this tutorial, you'll learn how to create a drag-and-drop file upload with HTML, CSS and JavaScript.

HTML:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Drag & Drop File Upload</title>
    <!-- Font Awesome Icons -->
    <link
      rel="stylesheet"
      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.0/css/all.min.css"
    />
    <!-- Google Font -->
    <link
      href="https://fonts.googleapis.com/css2?family=Poppins&display=swap"
      rel="stylesheet"
    />
    <!-- Stylesheet -->
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <input type="file" id="upload-button" multiple accept="image/*" />
      <label for="upload-button"
        ><i class="fa-solid fa-upload"></i>&nbsp; Choose Or Drop Photos
      </label>
      <div id="error"></div>
      <div id="image-display"></div>
    </div>
    <!-- Script -->
    <script src="script.js"></script>
  </body>
</html>

CSS:

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body {
  background-color: #f5f8ff;
}
.container {
  background-color: #ffffff;
  width: 60%;
  min-width: 37.5em;
  padding: 3.12em 1.87em;
  position: absolute;
  transform: translateX(-50%);
  left: 50%;
  top: 1em;
  box-shadow: 0 1.25em 3.43em rgba(0, 0, 0, 0.08);
  border-radius: 0.5em;
}
input[type="file"] {
  display: none;
}
label {
  display: block;
  position: relative;
  background-color: #025bee;
  color: #ffffff;
  font-size: 1.1em;
  text-align: center;
  width: 16em;
  padding: 1em 0;
  border-radius: 0.3em;
  margin: 0 auto 1em auto;
  cursor: pointer;
}
#image-display {
  position: relative;
  width: 90%;
  margin: 0 auto;
  display: flex;
  justify-content: space-evenly;
  gap: 1.25em;
  flex-wrap: wrap;
}
#image-display figure {
  width: 45%;
}
#image-display img {
  width: 100%;
}
#image-display figcaption {
  font-size: 0.8em;
  text-align: center;
  color: #5a5861;
}
.active {
  border: 0.2em dashed #025bee;
}
#error {
  text-align: center;
  color: #ff3030;
}

Javascript:

let uploadButton = document.getElementById("upload-button");
let chosenImage = document.getElementById("chosen-image");
let fileName = document.getElementById("file-name");
let container = document.querySelector(".container");
let error = document.getElementById("error");
let imageDisplay = document.getElementById("image-display");

const fileHandler = (file, name, type) => {
  if (type.split("/")[0] !== "image") {
    //File Type Error
    error.innerText = "Please upload an image file";
    return false;
  }
  error.innerText = "";
  let reader = new FileReader();
  reader.readAsDataURL(file);
  reader.onloadend = () => {
    //image and file name
    let imageContainer = document.createElement("figure");
    let img = document.createElement("img");
    img.src = reader.result;
    imageContainer.appendChild(img);
    imageContainer.innerHTML += `<figcaption>${name}</figcaption>`;
    imageDisplay.appendChild(imageContainer);
  };
};

//Upload Button
uploadButton.addEventListener("change", () => {
  imageDisplay.innerHTML = "";
  Array.from(uploadButton.files).forEach((file) => {
    fileHandler(file, file.name, file.type);
  });
});

container.addEventListener(
  "dragenter",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.add("active");
  },
  false
);

container.addEventListener(
  "dragleave",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.remove("active");
  },
  false
);

container.addEventListener(
  "dragover",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.add("active");
  },
  false
);

container.addEventListener(
  "drop",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.remove("active");
    let draggedData = e.dataTransfer;
    let files = draggedData.files;
    imageDisplay.innerHTML = "";
    Array.from(files).forEach((file) => {
      fileHandler(file, file.name, file.type);
    });
  },
  false
);

window.onload = () => {
  error.innerText = "";
};

---

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Simple Drag and Drop File Upload Tutorial - HTML, CSS & JavaScript

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Drag & Drop or Browse - File upload Feature using HTML CSS & JavaScript

#html #css #javascript

How to Drag and Drop File Upload with HTML CSS JavaScript

In this article you will know how to create Drag and Drop File Upload using HTML CSS and JavaScript. Earlier I have shared many more types of Drag and Drop elements and File Upload and Preview section. This is basically a drag and drop multiple file upload that I made with javascript.

Now it’s time to create JavaScript Drag and Drop File Upload. Here I have created the basic structure by html. I designed it with css and activated this Drag & Drop or Browse – File upload with javascript.

Drag And Drop File Upload Javascript

Drag and drop file upload in JavaScript refers to the ability to select one or more files using the drag and drop gesture, and then upload those files to a server. 

This feature is typically implemented using JavaScript event listeners, such as “dragover” and “drop,” that detect when a file is being dragged over a specific element on the page and when the file is dropped onto that element. Within this project () you can upload the image by selecting it and you can also upload it by drag and drop. Also here you can upload multiple images.

As you can see above this is a simple javascript drag and drop file upload project. Here I have created a small area or box. Inside that box is a button. You can select the image by clicking on that button or you can drag and drop the image into the box. Then the uploaded image can be seen in the preview box below.

How To Make A Drag and Drop File Uploader With JavaScript

Now if you want to build(How To Make A Drag-and-Drop File Uploader With javascript) this project then follow the step by step tutorial below. Here I have given you the necessary explanation and source code. A bit more JavaScript is used here. But there is no reason to worry. I have explained each code step by step and tried to explain you completely why I used that line of code.

Besides, I have given a preview after each step. Which will help you to know what kind of result will be seen after using that code.

Step 1: Basic Structure of Drag and Drop File Uploader

I have created the basic structure of this Drag and drop multiple file upload using the following html and css. All the information of that box can be seen. I used white for the background color of the box and some shadows around it.

<div class="container">

</div>

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body {
  background-color: #a4b7e3;
}
.container {
  background-color: #ffffff;
  width: 60%;
  min-width: 27.5em;
  padding: 3.12em 1.87em;
  position: absolute;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  box-shadow: 0 1.25em 3.43em rgba(0, 0, 0, 0.08);
  border-radius: 0.5em;
}

Step 2: Create a file upload button

Now an input button is created to upload the file. I have created this button using HTML’s input function. For uploading image only I used accept=”image/*” which basically will help to upload image file only.

<input type="file" id="upload-button" multiple accept="image/*" />
<label for="upload-button">
  <i class="fa-solid fa-upload"></i>&nbsp; Choose Or Drop Photos
</label>

input[type="file"] {
  display: none;
}
label {
  display: block;
  position: relative;
  background-color: #025bee;
  color: #ffffff;
  font-size: 1.1em;
  text-align: center;
  width: 16em;
  padding: 1em 0;
  border-radius: 0.3em;
  margin: 0 auto 1em auto;
  cursor: pointer;
}

Step 3: Create a place to preview the image

Now an area is created, in which the images can be viewed i.e. image preview area is created. How images are displayed is determined by css.

<div id="error"></div>
<div id="image-display"></div>

#image-display {
  position: relative;
  width: 90%;
  margin: 0 auto;
  display: flex;
  justify-content: space-evenly;
  gap: 1.25em;
  flex-wrap: wrap;
}
#image-display figure {
  width: 45%;
}
#image-display img {
  width: 100%;
}
#image-display figcaption {
  font-size: 0.8em;
  text-align: center;
  color: #5a5861;
}

.active {
  border: 0.2em dashed #025bee;
}
#error {
  text-align: center;
  color: #ff3030;
}

Step 4: Enable the drag and drop multiple files uploader

Now it’s time to implement this drag and drop multiple file uploader using javascript. Here I have given the necessary explanation, hope you will not have any difficulty in understanding.

These lines of code are assigning variables to different elements on a webpage by their ID to active Drag And Drop File Uploader in javascript. The variables are:

• uploadButton is assigned to the element with the ID “upload-button”
• chosenImage is assigned to the element with the ID “chosen-image”
• fileName is assigned to the element with the ID “file-name”
• container is assigned to the first element with the class “container”
• error is assigned to the element with the ID “error”
• imageDisplay is assigned to the element with the ID “image-display”

It appears that these variables will be used to manipulate these elements and their properties in later JavaScript code.

let uploadButton = document.getElementById("upload-button");
let chosenImage = document.getElementById("chosen-image");
let fileName = document.getElementById("file-name");
let container = document.querySelector(".container");
let error = document.getElementById("error");
let imageDisplay = document.getElementById("image-display");

This code defines a function fileHandler() that takes in three parameters: file, name, and type. The function checks if the file is of type image by checking the first part of the type string before “/” if it is not of type image it sets the innerText of the error element to “Please upload an image file” and returns false. 

If the file is an image, it sets the innerText of the error element to an empty string and creates a new FileReader object, which reads the contents of the file as a Data URL. 

When the file has been read, the onloadend event is triggered, at this point it creates an imageContainer element and an img element, sets the source of the img element to the result of the file reader, appends the img element to the imageContainer element, and then appends a figcaption element containing the file name to the imageContainer element. Finally, it appends the imageContainer element to the imageDisplay element.

const fileHandler = (file, name, type) => {
  if (type.split("/")[0] !== "image") {
    //File Type Error
    error.innerText = "Please upload an image file";
    return false;
  }
  error.innerText = "";
  let reader = new FileReader();
  reader.readAsDataURL(file);
  reader.onloadend = () => {
    //image and file name
    let imageContainer = document.createElement("figure");
    let img = document.createElement("img");
    img.src = reader.result;
    imageContainer.appendChild(img);
    imageContainer.innerHTML += `<figcaption>${name}</figcaption>`;
    imageDisplay.appendChild(imageContainer);
  };
};

Now Drag and Drop File Upload project upload button should be activated. This code attaches an event listener to the uploadButton element that listens for a “change” event. When the event is fired, the function inside the event listener is executed. The function clears the content of the imageDisplay element by setting its innerHTML to an empty string. 

Then it creates an array of the files from the uploadButton element, and for each file in that array, it calls the fileHandler() function and passes in the file, the file.name, and the file.type as the arguments. 

This code is used to handle the event of a user selecting and uploading one or more image files, displaying each image file and its name on the page by calling the fileHandler function for each file.

//Upload Button
uploadButton.addEventListener("change", () => {
  imageDisplay.innerHTML = "";
  Array.from(uploadButton.files).forEach((file) => {
    fileHandler(file, file.name, file.type);
  });
});

Now you need to define what happens when you drag the file into the Simple javascript Drag and Drop File Upload box. This code attaches an event listener to the container element that listens for a “dragenter” event. When the event is fired, the function inside the event listener is executed. The function calls preventDefault() and stopPropagation() on the event object (e) to prevent the default browser behavior and stop the event from propagating. 

Then it adds a class “active” to the container element’s classList. This code is probably used to handle the event of a user dragging an item over the container element, indicating that the container is a valid drop target. 

The class “active” is added to the container which can be used to style it and give visual feedback that the container is active and ready to accept the dragged item.

container.addEventListener(
  "dragenter",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.add("active");
  },
  false
);

Now you need to determine what happens if you drag leave within the HTML drag drop upload area. This code attaches an event listener to the container element that listens for a “dragleave” event. When the event is fired, the function inside the event listener is executed. The function calls preventDefault() and stopPropagation() on the event object (e) to prevent the default browser behavior and stop the event from propagating. 

Then it removes the class “active” from the container element’s classList. This code is probably used to handle the event of a user dragging an item out of the container element, indicating that the container is no longer a valid drop target. 

The class “active” is removed from the container, it can be used to style it and give visual feedback that the container is no longer active and no longer ready to accept the dragged item.

container.addEventListener(
  "dragleave",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.remove("active");
  },
  false
);

Upload files with Drag and Drop to determine what happens when dragover. This code attaches an event listener to the container element that listens for a “dragover” event. When the event is fired, the function inside the event listener is executed. The function calls preventDefault() and stopPropagation() on the event object (e) to prevent the default browser behavior and stop the event from propagating. 

container.addEventListener(
  "dragover",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.add("active");
  },
  false
);

This code attaches an event listener to the container element that listens for a “drop” event. When the event is fired, the function inside the event listener is executed. The function calls preventDefault() and stopPropagation() on the event object (e) to prevent the default browser behavior and stop the event from propagating. 

Then it removes the class “active” from the container element’s classList. It then creates a variable draggedData which holds the dataTransfer object of the event, which contains the data that was dropped onto the element. It then creates a variable files which holds the file object from the draggedData object. It clears the content of the imageDisplay element by setting its innerHTML to an empty string. 

Then it creates an array of the files and for each file in that array, it calls the fileHandler() function and passes in the file, the file.name, and the file.type as the arguments. This code is used to handle the event of a user dropping one or more files on to the container element, which then calls the fileHandler function to display the image and its name on the page.

container.addEventListener(
  "drop",
  (e) => {
    e.preventDefault();
    e.stopPropagation();
    container.classList.remove("active");
    let draggedData = e.dataTransfer;
    let files = draggedData.files;
    imageDisplay.innerHTML = "";
    Array.from(files).forEach((file) => {
      fileHandler(file, file.name, file.type);
    });
  },
  false
);

Now it is determined that every time the page is loaded all the information contained in the Drag and Drop File Upload with HTML CSS JavaScript will be removed. This code assigns an anonymous function to the onload property of the window object, which is fired when the page has finished loading. The function sets the innerText of the error element to an empty string, effectively clearing any pre-existing text. 

window.onload = () => {
  error.innerText = "";
};

Hope you got to know from above tutorial how I created this project(Drag and Drop File Upload Using HTML,CSS & JavaScript). I have already shared many more JavaScript tutorials with you.

Be sure to comment how you liked this Drag and Drop File Upload JavaScript tutorial.

Original article source at: https://foolishdeveloper.com/

#javascript #html #css #drop #upload 

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CSS Alignment Made Simple

CSS is seen as an impediment in web development for many of us. Most of the time it looks like even when you follow the rules and everything seems clear, it still doesn’t work the way you want it to.

Therefore, the purpose of this article is to make some features of CSS much easier to understand.

The thing I want to address now is the alignment of the elements.

Without further ado, here are some of the most common scenarios one might encounter when it comes to this topic and how they can be approached.

#css-center #css-position #css-flexbox #css-center-image-in-a-div #css