MediumEditor

This is a clone of medium.com inline editor toolbar.

MediumEditor has been written using vanilla JavaScript, no additional frameworks required.

Browser Support


IE 9+ ✔	Latest ✔	Latest ✔	Latest ✔	Latest ✔

Basic usage

demo: http://daviferreira.github.io/medium-editor/

Installation

Via bower:

Run in your console: bower install medium-editor

Manual installation:

Download the latest release and attach medium editor's stylesheets to your page:

<link rel="stylesheet" href="css/medium-editor.css"> <!-- Core -->
<link rel="stylesheet" href="css/themes/default.css"> <!-- or any other theme -->

The next step is to reference the editor's script

<script src="js/medium-editor.js"></script>

Usage

You can now instantiate a new MediumEditor object:

<script>var editor = new MediumEditor('.editable');</script>

The above code will transform all the elements with the .editable class into HTML5 editable contents and add the medium editor toolbar to them.

You can also pass a list of HTML elements:

var elements = document.querySelectorAll('.editable'),
    editor = new MediumEditor(elements);

IE9

If you want to support IE9, you will need to use a classList pollyfill, like Eli Grey's, available at https://github.com/eligrey/classList.js.

Initialization options

Core options

allowMultiParagraphSelection: enables the toolbar when selecting multiple paragraphs/block elements. Default: true
cleanPastedHTML: cleans pasted content from different sources, like google docs etc. Default: false
delay: time in milliseconds to show the toolbar or anchor tag preview. Default: 0
disableReturn: enables/disables the use of the return-key. You can also set specific element behavior by using setting a data-disable-return attribute. Default: false
disableDoubleReturn: allows/disallows two (or more) empty new lines. You can also set specific element behavior by using setting a data-disable-double-return attribute. Default: false
disableEditing: enables/disables adding the contenteditable behavior. Useful for using the toolbar with customized buttons/actions. You can also set specific element behavior by using setting a data-disable-editing attribute. Default: false
disablePlaceholders: enables/disables support for placeholder, including DOM element creation and attaching event handlers. When disabled, medium-editor will ignore the placholder option and not show placeholder text. Default: false
elementsContainer: specifies a DOM node to contain MediumEditor's toolbar and anchor preview elements. Default: document.body
extensions: extension to use (see Extensions) for more. Default: {}
firstHeader: HTML tag to be used as first header. Default: h3
forcePlainText: Forces pasting as plain text. Default: true
placeholder: Defines the default placeholder for empty contenteditables when disablePlaceholders is not set to true. You can overwrite it by setting a data-placeholder attribute on your elements. Default: 'Type your text'
secondHeader: HTML tag to be used as second header. Default: h4
standardizeSelectionStart: Standardizes how the beginning of a range is decided between browsers whenever the selected text is analyzed for updating toolbar buttons status

Toolbar options

activeButtonClass: CSS class added to active buttons in the toolbar. Default: 'medium-editor-button-active'
buttons: the set of buttons to display on the toolbar. Default: ['bold', 'italic', 'underline', 'anchor', 'header1', 'header2', 'quote']
buttonLabels: type of labels on the buttons. Values: 'fontawesome', {'bold': '<b>b</b>', 'italic': '<i>i</i>'}. Default: false
diffLeft: value in pixels to be added to the X axis positioning of the toolbar. Default: 0
diffTop: value in pixels to be added to the Y axis positioning of the toolbar. Default: -10
disableToolbar: enables/disables the toolbar, adding only the contenteditable behavior. You can also set specific element behavior by using setting a data-disable-toolbar attribute. Default: false
firstButtonClass: CSS class added to the first button in the toolbar. Default: 'medium-editor-button-first'
lastButtonClass: CSS class added to the last button in the toolbar. Default: 'medium-editor-button-last'
onShowToolbar: optional callback that will be called each time the toolbar is actually shown for this instance of medium-editor.
onHideToolbar: optional callback that will be called each time the toolbar is actually hidden for this instance of medium-editor.
staticToolbar: enable/disable the toolbar always displaying in the same location relative to the medium-editor element. Default: false
stickyToolbar: enable/disable the toolbar "sticking" to the medium-editor element when the page is being scrolled. Default: false
toolbarAlign: left|center|right - Aligns the toolbar relative to the medium-editor element.
updateOnEmptySelection: update the state of the toolbar buttons even when the selection is collapse (there is no selection, just a cursor). Default: false

Anchor form options

anchorButton: enables/disables adding class anchorButtonClass to anchor tags. Default: false
anchorButtonClass: class to add to anchor tags, when anchorButton is set to true. Default: btn
anchorInputPlaceholder: text to be shown as placeholder of the anchor input. Default: Paste or type a link
anchorInputCheckboxLabel: text to be shown for the anchor new window target. Default: Open in new window
anchorPreviewHideDelay: time in milliseconds to show the anchor tag preview after the mouse has left the anchor tag. Default: 500
checkLinkFormat: enables/disables check for common URL protocols on anchor links. Default: false
disableAnchorForm: enables/disables the built-in anchor url collection ux, including DOM element creation and attaching event handlers. When disabled, medium-editor will not automatically handle collecting a url if a 'anchor' button is included in the toolbar. Default: false
targetBlank: enables/disables target="_blank" for anchor tags. Default: false

Example:

var editor = new MediumEditor('.editable', {
    anchorInputPlaceholder: 'Type a link',
    buttons: ['bold', 'italic', 'quote'],
    diffLeft: 25,
    diffTop: 10,
    firstHeader: 'h1',
    secondHeader: 'h2',
    delay: 1000,
    targetBlank: true
});

Extra buttons

Medium Editor, by default, will show only the buttons listed above to avoid a huge toolbar. There are a couple of extra buttons you can use:

superscript
subscript
strikethrough
unorderedlist
orderedlist
pre
justifyLeft
justifyFull
justifyCenter
justifyRight
image (this simply converts selected text to an image tag)
indent (moves the selected text up one level)
outdent (moves the selected text down one level)

Themes

Check out the Wiki page for a list of available themes: https://github.com/daviferreira/medium-editor/wiki/Themes

API

.deactivate(): disables the editor
.activate(): re-activates the editor
.serialize(): returns a JSON object with elements contents

Capturing DOM changes

For observing any changes on contentEditable

$('.editable').on('input', function() {
  // Do some work
});

This is handy when you need to capture modifications other thats outside of key up's scope like clicking on toolbar buttons.

input is supported by Chrome, Firefox, IE9 and other modern browsers. If you want to read more or support older browsers, check Listening to events of a contenteditable HTML element and Detect changes in the DOM

MediumButton

Patrick Stillhar developed a new and improved way to add buttons to our toolbar. Check it out at: https://stillhart.biz/project/MediumButton/

Extensions

To add additional functions that are not supported by the native browser API you can write extensions that are then integrated into the toolbar. The Extension API is currently unstable and very minimal.

An extension is an object that has essentially three functions getButton, getForm and checkState.

getButton is called when the editor is initialized and should return an element that is integrated into the toolbar. Usually this will be a <button> element like the ones Medium Editor uses. All event handling on this button is entirely up to you so you should either keep a reference or bind your eventhandlers before returning it. You can also return a HTML-String that is then integrated into the toolbar also this is not really useful.
getForm is called when the editor is initialized and should return an element that is integrated into the toolbar. Usually this will be a <div> element that would contain some input elements. Handling the saving and canceling of the form is entirely up to you so you should either keep a reference or bind your eventhandlers before returning it.
checkState is called whenever a user selects some text in the area where the Medium Editor instance is running. It's responsability is to toggle the current state of the button. I.e. marking is a on or off. Again the method on how determine the state is entirely up to you. checkState will be called multiple times and will receive a DOM Element as parameter.

Properties

parent add this property to your extension class constructor and set it to true to be able to access the Medium Editor instance through the base property that will be set during the initialization
hasForm add this property to your extension class constructor and set it to true to tell Medium Editor that your extension contains a form. Medium editor will handle opening the form for you on your extension's button click.

Examples

A simple example the uses rangy and the CSS Class Applier Module to support highlighting of text:

rangy.init();

function Highlighter() {
    this.button = document.createElement('button');
    this.button.className = 'medium-editor-action';
    this.button.textContent = 'H';
    this.button.onclick = this.onClick.bind(this);
    this.classApplier = rangy.createCssClassApplier("highlight", {
        elementTagName: 'mark',
        normalize: true
    });
}
Highlighter.prototype.onClick = function() {
    this.classApplier.toggleSelection();
};
Highlighter.prototype.getButton = function() {
    return this.button;
};
Highlighter.prototype.checkState = function (node) {
    if(node.tagName == 'MARK') {
        this.button.classList.add('medium-editor-button-active');
    }
};

var e = new MediumEditor('.editor', {
    buttons: ['highlight', 'bold', 'italic', 'underline'],
    extensions: {
        'highlight': new Highlighter()
    }
});

A simple example that uses the parent attribute:

function Extension() {
  this.parent = true;

  this.button = document.createElement('button');
  this.button.className = 'medium-editor-action';
  this.button.textContent = 'X';
  this.button.onclick = this.onClick.bind(this);
}

Extension.prototype.getButton = function() {
  return this.button;
};

Extension.prototype.onClick = function() {
  alert('This is editor: #' + this.base.id);
};

var one = new MediumEditor('.one', {
    buttons: ['extension'],
    extensions: {
      extension: new Extension()
    }
});

var two = new MediumEditor('.two', {
    buttons: ['extension'],
    extensions: {
      extension: new Extension()
    }
});

A simple table example that uses the hasForm attribute:

function Table(options) {
    this.parent = true;
    this.hasForm = true;
    this.options = options;
}

Table.prototype.init = function() {
    this.createButton();
    this.createForm();
};

Table.prototype.createButton = function() {
    this.button = document.createElement('button');
    this.button.className = 'medium-editor-action';
    this.button.textContent = 'T';
    if(this.base.options.buttonLabels === 'fontawesome'){
        this.button.innerHTML = '<i class="fa fa-table"></i>'; 
    }
    this.button.onclick = this.onClick.bind(this);
};

Table.prototype.createForm = function() {
    this.form = document.createElement('div'),
    this.close = document.createElement('a'),
    this.save = document.createElement('a'),
    this.columnInput = document.createElement('input'),
    this.rowInput = document.createElement('input');

    this.close.setAttribute('href', '#');
    this.close.innerHTML = '&times;';
    this.close.onclick = this.onClose.bind(this);

    this.save.setAttribute('href', '#');
    this.save.innerHTML = '&#10003;';
    this.save.onclick = this.onSave.bind(this);

    this.columnInput.setAttribute('type', 'text');
    // Add the input CSS class for correct styling
    this.columnInput.className = 'medium-editor-toolbar-input';
    this.columnInput.setAttribute('placeholder', 'Column Count');

    this.rowInput.setAttribute('type', 'text');
    // Add the input CSS class for correct styling
    this.rowInput.className = 'medium-editor-toolbar-input';
    this.rowInput.setAttribute('placeholder', 'Row Count');

    this.form.appendChild(this.columnInput);
    this.form.appendChild(this.rowInput);

    this.form.appendChild(this.save);
    this.form.appendChild(this.close);
};

Table.prototype.getButton = function() {
    return this.button;
};

Table.prototype.getForm = function() {
    return this.form;
};

Table.prototype.onClick = function() {
    this.columnInput.value = this.options.defaultColumns;
    this.rowInput.value = this.options.defaultRows;
};

Table.prototype.onClose = function(e) {
    e.preventDefault();
    this.base.hideForm(this.form);
};

Table.prototype.onSave = function(e) {
    e.preventDefault();
    var columnCount = this.columnInput.value;
    var rowCount = this.rowInput.value;
    var table = this.createTable(columnCount, rowCount);

    this.base.pasteHTML(table.innerHTML);
    this.base.hideForm(this.form);
};

// Create the table element.
Table.prototype.createTable = function(cols, rows) {
    var table = document.createElement('table'),
        header = document.createElement('thead'),
        headerRow = document.createElement('tr'),
        body = document.createElement('tbody'),
        wrap = document.createElement('div');

    for (var h = 1; h <= cols; h++) {
        var headerCol = document.createElement('th');
        headerCol.innerHTML = '...';
        headerRow.appendChild(headerCol);   
    }

    header.appendChild(headerRow);

    for (var r = 1; r <= rows; r++) {
        var bodyRow = document.createElement('tr');
        for (var c = 1; c <= this.options.defaultColumns; c++) {
            var bodyCol = document.createElement('td');
            bodyCol.innerHTML = '...';
            bodyRow.appendChild(bodyCol);       
        }
        body.appendChild(bodyRow);
    }

    table.appendChild(header);
    table.appendChild(body);
    wrap.appendChild(table);

    return wrap;
};

// When creating your Medium Editor
var editor = new MediumEditor('.editable', {
    buttons: ['table'],
    extensions: {
        'table': new Table({
            defaultColumns: 3,
            defaultRows: 2
        }),
});

Image Upload & embeds

Pavel Linkesch has developed a jQuery plugin to upload images & embed content (from Twitter, Youtube, Vimeo, etc.) following Medium.com functionality. Check it out at http://orthes.github.io/medium-editor-insert-plugin/

Laravel

Zvonko Biškup has written an awesome tutorial about how to integrate MediumEditor into your Laravel Project.

Rails Gem

Ahmet Sezgin Duran gemified Medium Editor for Rails asset pipeline, check it out at https://github.com/marjinal1st/medium-editor-rails.

Angular directive

Thijs Wijnmaalen hacked together an AngularJS directive. Check it out at https://github.com/thijsw/angular-medium-editor

Development

MediumEditor development tasks are managed by Grunt. To install all the necessary packages, just invoke:

npm install

These are the available grunt tasks:

js: runs jslint and jasmine tests and creates minified and concatenated versions of the script;
css: runs autoprefixer and csslint
test: runs jasmine tests, jslint and csslint
watch: watch for modifications on script/scss files

The source files are located inside the src directory.

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Test your changes to the best of your ability.
Update the documentation to reflect your changes if they add or changes current functionality.
Commit your changes (git commit -am 'Added some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request

Contributors

 project  : medium-editor
 repo age : 1 year, 8 months
 active   : 217 days
 commits  : 730
 files    : 61
 authors  :
   497	Davi Ferreira           68.1%
    20	Maxime de Visscher      2.7%
    18	Andy Yaco-Mink          2.5%
    15	Nate Mielnik            2.1%
     9	Noah Chase              1.2%
     8	Derek Odegard           1.1%
     8	Jarl Gunnar T. Flaten   1.1%
     8	Pedro Nasser            1.1%
     8	Seif                    1.1%
     7	Aidan Threadgold        1.0%
     7	Alfonso (the fonz) de la Osa 1.0%
     7	OmniaGM                 1.0%
     6	Dayjo                   0.8%
     6	Pascal                  0.8%
     5	Martin Thurau           0.7%
     5	Raul Matei              0.7%
     4	Sebastian Zuchmanski    0.5%
     4	minikomi                0.5%
     3	Andrew Hubbs            0.4%
     3	Brian Reavis            0.4%
     3	Dmitri Cherniak         0.4%
     3	Nikita Korotaev         0.4%
     3	Pavel Linkesch          0.4%
     3	Troels Knak-Nielsen     0.4%
     3	arol                    0.4%
     3	ʞuıɯ-oɔɐʎ ʎpuɐ          0.4%
     2	Alexander Hofbauer      0.3%
     2	Ethan Turkeltaub        0.3%
     2	Jacob Magnusson         0.3%
     2	Jeremy                  0.3%
     2	Joel                    0.3%
     2	Karl Sander             0.3%
     2	Son Tran-Nguyen         0.3%
     2	jj                      0.3%
     2	mako                    0.3%
     1	Adam Mulligan           0.1%
     1	Alberto Gasparin        0.1%
     1	Bitdeli Chef            0.1%
     1	Carlos Alexandre Fuechter 0.1%
     1	Cenk Dölek             0.1%
     1	Dave Jarvis             0.1%
     1	David Collien           0.1%
     1	David Hellsing          0.1%
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     1	Diana Liao              0.1%
     1	Harshil Shah            0.1%
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     1	Jack Parker             0.1%
     1	Jeff Bellsey            0.1%
     1	Jeff Welch              0.1%
     1	Johann Troendle         0.1%
     1	Mark Kraemer            0.1%
     1	Max                     0.1%
     1	Maxime Dantec           0.1%
     1	Maxime De Visscher      0.1%
     1	Michael Kay             0.1%
     1	Moore Adam              0.1%
     1	Nic Malan               0.1%
     1	Nick Semenkovich        0.1%
     1	Noah Paessel            0.1%
     1	Patrick Cavanaugh       0.1%
     1	Patrick Kempff          0.1%
     1	Peleg Rosenthal         0.1%
     1	Randson Oliveira        0.1%
     1	Richard Park            0.1%
     1	Robert Koritnik         0.1%
     1	Sarah Squire            0.1%
     1	Scott Carleton          0.1%
     1	Søren Torp Petersen     0.1%
     1	Tom MacWright           0.1%
     1	happyaccidents          0.1%
     1	mako yass               0.1%
     1	mbrookes                0.1%
     1	muescha                 0.1%
     1	shaohua                 0.1%
     1	t_kjaergaard            0.1%
     1	typify                  0.1%
     1	valentinnew             0.1%
     1	waffleio                0.1%
     1	zzjin                   0.1%

License

"THE BEER-WARE LICENSE" (Revision 42):

As long as you retain this notice you can do whatever you want with this stuff. If we meet some day, and you think this stuff is worth it, you can buy me a beer in return.

spencewood/medium-editor