MediumEditor
This is a clone of medium.com inline editor toolbar.
MediumEditor has been written using vanilla JavaScript, no additional frameworks required.
Browser Support
Basic usage
demo: http://yabwe.github.io/medium-editor/
Installation
Via npm:
Run in your console: npm install medium-editor
Via bower:
bower install medium-editor
Via an external CDN
- Using jsDelivr.
For the latest version:
<script src="//cdn.jsdelivr.net/medium-editor/latest/js/medium-editor.min.js"></script>
<link rel="stylesheet" href="//cdn.jsdelivr.net/medium-editor/latest/css/medium-editor.min.css" type="text/css" media="screen" charset="utf-8">
For a custom one:
<script src="//cdn.jsdelivr.net/medium-editor/4.11.1/js/medium-editor.min.js"></script>
<link rel="stylesheet" href="//cdn.jsdelivr.net/medium-editor/4.11.1/css/medium-editor.min.css" type="text/css" media="screen" charset="utf-8">
- Using CDNJS.
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 -->
Usage
The next step is to reference the editor's script
<script src="js/medium-editor.js"></script>
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);
MediumEditor also supports textarea. If you provide a textarea element, the script will create a new div with contentEditable=true
, hide the textarea and link the textarea value to the div HTML content.
Integrating with various frameworks
People have contributed wrappers around MediumEditor for integrating with different frameworks and tech stacks. Take a look at the list of existing Wrappers and Integrations that have already been written for MediumEditor!
MediumEditor Options
View the MediumEditor Options documentation on all the various options for MediumEditor.
Options to customize medium-editor are passed as the second argument to the MediumEditor constructor. Example:
var editor = new MediumEditor('.editor', {
// options go here
});
Core options
- activeButtonClass: CSS class added to active buttons in the toolbar. Default:
'medium-editor-button-active'
- buttonLabels: type of labels on the buttons. Values:
false
| 'fontawesome'. Default:false
NOTE:
Using 'fontawesome'
as the buttonLabels requires version 4.1.0 of the fontawesome css to be on the page to ensure all icons will be displayed correctly
- 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
- disableExtraSpaces: when set to true, it disallows spaces at the beginning and end of the element. Also it disallows entering 2 consecutive spaces between 2 words. 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
- elementsContainer: specifies a DOM node to contain MediumEditor's toolbar and anchor preview elements. Default:
document.body
- extensions: extension to use (see Custom Buttons and Extensions) for more. Default:
{}
- spellcheck: Enable/disable native contentEditable automatic spellcheck. Default:
true
- targetBlank: enables/disables target="_blank" for anchor tags. Default:
false
Toolbar options
The toolbar for MediumEditor is implemented as a built-in extension which automatically displays whenever the user selects some text. The toolbar can hold any set of defined built-in buttons, but can also hold any custom buttons passed in as extensions.
Options for the toolbar are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
toolbar: {
/* These are the default options for the toolbar,
if nothing is passed this is what is used */
allowMultiParagraphSelection: true,
buttons: ['bold', 'italic', 'underline', 'anchor', 'h2', 'h3', 'quote'],
diffLeft: 0,
diffTop: -10,
firstButtonClass: 'medium-editor-button-first',
lastButtonClass: 'medium-editor-button-last',
standardizeSelectionStart: false,
static: false,
relativeContainer: null,
/* options which only apply when static is true */
align: 'center',
sticky: false,
updateOnEmptySelection: false
}
});
- allowMultiParagraphSelection: enables/disables whether the toolbar should be displayed when selecting multiple paragraphs/block elements. Default:
true
- buttons: the set of buttons to display on the toolbar. Default:
['bold', 'italic', 'underline', 'anchor', 'h2', 'h3', 'quote']
- See Button Options for details on more button options
- 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
- 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'
- standardizeSelectionStart: enables/disables standardizing how the beginning of a range is decided between browsers whenever the selected text is analyzed for updating toolbar buttons status. Default:
false
- static: enable/disable the toolbar always displaying in the same location relative to the medium-editor element. Default:
false
- relativeContainer: Toolbar is appended relative to a given DOM-Node instead of appending it to the body and position it absolute.
static
option is being used:
Options which only apply when the - align:
left
|center
|right
- When the static option istrue
, this aligns the static toolbar relative to the medium-editor element. Default:center
- sticky: When the static option is
true
, this enables/disables the toolbar "sticking" to the viewport and staying visible on the screen while the page scrolls. Default:false
- updateOnEmptySelection: When the static option is
true
, this enables/disables updating the state of the toolbar buttons even when the selection is collapsed (there is no selection, just a cursor). Default:false
To disable the toolbar (which also disables the anchor-preview extension), set the value of the toolbar
option to false
:
var editor = new MediumEditor('.editable', {
toolbar: false
});
Button Options
Button behavior can be modified by passing an object into the buttons array instead of a string. This allow for overriding some of the default behavior of buttons. The following options are some of the basic parts of buttons that you may override, but any part of the MediumEditor.Extension.prototype
can be overriden via these button options. (Check out the source code for buttons to see what all can be overriden).
- name: name of the button being overriden
- action: argument to pass to
MediumEditor.execAction()
when the button is clicked. - aria: value to add as the aria-label attribute of the button element displayed in the toolbar. This is also used as the tooltip for the button.
- tagNames: array of element tag names that would indicate that this button has already been applied. If this action has already been applied, the button will be displayed as 'active' in the toolbar.
- Example: For 'bold', if the text is ever within a
<b>
or<strong>
tag that indicates the text is already bold. So the array of tagNames for bold would be:['b', 'strong']
- NOTE: This is not used if
useQueryState
is set totrue
.
- Example: For 'bold', if the text is ever within a
- style: A pair of css property & value(s) that indicate that this button has already been applied. If this action has already been applied, the button will be displayed as 'active' in the toolbar.
- Example: For 'bold', if the text is ever within an element with a
'font-weight'
style property set to700
or'bold'
, that indicates the text is already bold. So the style object for bold would be{ prop: 'font-weight', value: '700|bold' }
- NOTE: This is not used if
useQueryState
is set totrue
. - Properties of the style object:
- prop: name of the css property
- value: value(s) of the css property (multiple values can be separated by a
'|'
)
- Example: For 'bold', if the text is ever within an element with a
- useQueryState: Enables/disables whether this button should use the built-in
document.queryCommandState()
method to determine whether the action has already been applied. If the action has already been applied, the button will be displayed as 'active' in the toolbar- Example: For 'bold', if this is set to true, the code will call
document.queryCommandState('bold')
which will return true if the browser thinks the text is already bold, and false otherwise
- Example: For 'bold', if this is set to true, the code will call
- contentDefault: Default
innerHTML
to put inside the button - contentFA: The
innerHTML
to use for the content of the button if the buttonLabels option for MediumEditor is set to'fontawesome'
- classList: An array of classNames (strings) to be added to the button
- attrs: A set of key-value pairs to add to the button as custom attributes to the button element.
Example of overriding buttons (here, the goal is to mimic medium by having H1 and H2 buttons which actually produce <h2>
and <h3>
tags respectively):
var editor = new MediumEditor('.editable', {
toolbar: {
buttons: [
'bold',
'italic',
{
name: 'h1',
action: 'append-h2',
aria: 'header type 1',
tagNames: ['h2'],
contentDefault: '<b>H1</b>',
classList: ['custom-class-h1'],
attrs: {
'data-custom-attr': 'attr-value-h1'
}
},
{
name: 'h2',
action: 'append-h3',
aria: 'header type 2',
tagNames: ['h3'],
contentDefault: '<b>H2</b>',
classList: ['custom-class-h2'],
attrs: {
'data-custom-attr': 'attr-value-h2'
}
},
'justifyCenter',
'quote',
'anchor'
]
}
});
Anchor Preview options
The anchor preview is a built-in extension which automatically displays a 'tooltip' when the user is hovering over a link in the editor. The tooltip will display the href
of the link, and when click, will open the anchor editing form in the toolbar.
Options for the anchor preview 'tooltip' are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
anchorPreview: {
/* These are the default options for anchor preview,
if nothing is passed this is what it used */
hideDelay: 500,
previewValueSelector: 'a'
}
}
});
- hideDelay: time in milliseconds to show the anchor tag preview after the mouse has left the anchor tag. Default:
500
- previewValueSelector: the default selector to locate where to put the activeAnchor value in the preview. You should only need to override this if you've modified the way in which the anchor-preview extension renders. Default:
'a'
- showWhenToolbarIsVisible: determines whether the anchor tag preview shows up when the toolbar is visible. You should set this value to true if the static option for the toolbar is true and you want the preview to show at the same time. Default:
false
To disable the anchor preview, set the value of the anchorPreview
option to false
:
var editor = new MediumEditor('.editable', {
anchorPreview: false
});
NOTE:
- If the toolbar is disabled (via
toolbar: false
option ordata-disable-toolbar
attribute) the anchor-preview is automatically disabled. - If the anchor editing form is not enabled, clicking on the anchor-preview will not allow the href of the link to be edited
Placeholder Options
The placeholder handler is a built-in extension which displays placeholder text when the editor is empty.
Options for placeholder are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
placeholder: {
/* This example includes the default options for placeholder,
if nothing is passed this is what it used */
text: 'Type your text'
}
});
- text: Defines the default placeholder for empty contenteditables when placeholder is not set to false. You can overwrite it by setting a
data-placeholder
attribute on the editor elements. Default:'Type your text'
To disable the placeholder, set the value of the placeholder
option to false
:
var editor = new MediumEditor('.editable', {
placeholder: false
});
Anchor Form options
The anchor form is a built-in button extension which allows the user to add/edit/remove links from within the editor. When 'anchor' is passed in as a button in the list of buttons, this extension will be enabled and can be triggered by clicking the corresponding button in the toolbar.
Options for the anchor form are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
toolbar: {
buttons: ['bold', 'italic', 'underline', 'anchor']
},
anchor: {
/* These are the default options for anchor form,
if nothing is passed this is what it used */
customClassOption: null,
customClassOptionText: 'Button',
linkValidation: false,
placeholderText: 'Paste or type a link',
targetCheckbox: false,
targetCheckboxText: 'Open in new window'
}
}
});
- customClassOption: custom class name the user can optionally have added to their created links (ie 'button'). If passed as a non-empty string, a checkbox will be displayed allowing the user to choose whether to have the class added to the created link or not. Default:
null
- customClassOptionText: text to be shown in the checkbox when the customClassOption is being used. Default:
'Button'
- linkValidation: enables/disables check for common URL protocols on anchor links. Default:
false
- placeholderText: text to be shown as placeholder of the anchor input. Default:
'Paste or type a link'
- targetCheckbox: enables/disables displaying a "Open in new window" checkbox, which when checked changes the
target
attribute of the created link. Default:false
- targetCheckboxText: text to be shown in the checkbox enabled via the targetCheckbox option. Default:
'Open in new window'
Paste Options
The paste handler is a built-in extension which attempts to filter the content when the user pastes. How the paste handler filters is configurable via specific options.
Options for paste handling are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
paste: {
/* This example includes the default options for paste,
if nothing is passed this is what it used */
forcePlainText: true,
cleanPastedHTML: false,
cleanReplacements: [],
cleanAttrs: ['class', 'style', 'dir'],
cleanTags: ['meta']
}
});
- forcePlainText: Forces pasting as plain text. Default:
true
- cleanPastedHTML: cleans pasted content from different sources, like google docs etc. Default:
false
- cleanReplacements: custom pairs (2 element arrays) of RegExp and replacement text to use during paste when forcePlainText or cleanPastedHTML are
true
OR when callingcleanPaste(text)
helper method. Default:[]
- cleanAttrs: list of element attributes to remove during paste when cleanPastedHTML is
true
or when callingcleanPaste(text)
orpasteHTML(html,options)
helper methods. Default:['class', 'style', 'dir']
- cleanTags: list of element tag names to remove during paste when cleanPastedHTML is
true
or when callingcleanPaste(text)
orpasteHTML(html,options)
helper methods. Default:['meta']
KeyboardCommands Options
The keyboard commands handler is a built-in extension for mapping key-combinations to actions to execute in the editor.
Options for KeyboardCommands are passed as an object that is a member of the outer options object. Example:
var editor = new MediumEditor('.editable', {
keyboardCommands: {
/* This example includes the default options for keyboardCommands,
if nothing is passed this is what it used */
commands: [
{
command: 'bold',
key: 'B',
meta: true,
shift: false,
alt: false
},
{
command: 'italic',
key: 'I',
meta: true,
shift: false,
alt: false
},
{
command: 'underline',
key: 'U',
meta: true,
shift: false,
alt: false
}
],
}
});
- commands: Array of objects describing each command and the combination of keys that will trigger it. Required for each object:
- command: argument passed to
editor.execAction()
when key-combination is used- if defined as
false
, the shortcut will be disabled
- if defined as
- key: keyboard character that triggers this command
- meta: whether the ctrl/meta key has to be active or inactive
- shift: whether the shift key has to be active or inactive
- alt: whether the alt key has to be active or inactive
- command: argument passed to
To disable the keyboard commands, set the value of the keyboardCommands
option to false
:
var editor = new MediumEditor('.editable', {
keyboardCommands: false
});
Auto Link Options
The auto-link handler is a built-in extension which automatically turns URLs entered into the text field into HTML anchor tags (similar to the functionality of Markdown). This feature is OFF by default.
To enable built-in auto-link support, set the value of the autoLink
option to true
:
var editor = new MediumEditor('.editable', {
autoLink: true
});
Image Dragging Options
The image dragging handler is a built-in extenson for handling dragging & dropping images into the contenteditable. This feature is ON by default.
To disable built-in image dragging, set the value of the imageDragging
option to false
:
var editor = new MediumEditor('.editable', {
imageDragging: false
});
Options Example:
var editor = new MediumEditor('.editable', {
delay: 1000,
targetBlank: true,
toolbar: {
buttons: ['bold', 'italic', 'quote'],
diffLeft: 25,
diffTop: 10,
},
anchor: {
placeholderText: 'Type a link',
customClassOption: 'btn',
customClassOptionText: 'Create Button'
},
paste: {
cleanPastedHTML: true,
cleanAttrs: ['style', 'dir'],
cleanTags: ['label', 'meta']
},
anchorPreview: {
hideDelay: 300
},
placeholder: {
text: 'Click to edit'
}
});
Buttons
By default, MediumEditor supports buttons for most of the commands for document.execCommand()
that are well-supported across all its supported browsers.
Default buttons.
MediumEditor, by default, will show only the buttons listed here to avoid a huge toolbar:
- bold
- italic
- underline
- anchor (built-in support for collecting a url via the anchor extension)
- h2
- h3
- quote
All buttons.
These are all the built-in buttons supported by MediumEditor.
- bold
- italic
- underline
- strikethrough
- subscript
- superscript
- anchor
- image (this simply converts selected text to an image tag)
- quote
- pre
- orderedlist
- unorderedlist
- indent (moves the selected text up one level)
- outdent (moves the selected text down one level)
- justifyLeft
- justifyCenter
- justifyRight
- justifyFull
- h1
- h2
- h3
- h4
- h5
- h6
- removeFormat (clears inline style formatting, preserves blocks)
Themes
Check out the Wiki page for a list of available themes: https://github.com/yabwe/medium-editor/wiki/Themes
API
View the MediumEditor Object API documentation on the Wiki for details on all the methods supported on the MediumEditor object.
Initialization methods
- MediumEditor(elements, options): Creates an instance of MediumEditor
- .destroy(): tears down the editor if already setup, removing all DOM elements and event handlers
- .setup(): rebuilds the editor if it has already been destroyed, recreating DOM elements and attaching event handlers
Event Methods
- .on(target, event, listener, useCapture): attach a listener to a DOM event which will be detached when MediumEditor is deactivated
- .off(target, event, listener, useCapture): detach a listener to a DOM event that was attached via
on()
- .subscribe(event, listener): attaches a listener to a custom medium-editor event
- .unsubscribe(event, listener): detaches a listener from a custom medium-editor event
- .trigger(name, data, editable): manually triggers a custom medium-editor event
Selection Methods
- .checkSelection(): manually trigger an update of the toolbar and extensions based on the current selection
- .exportSelection(): return a data representation of the selected text, which can be applied via
importSelection()
- .importSelection(selectionState): restore the selection using a data representation of previously selected text (ie value returned by
exportSelection()
) - .getFocusedElement(): returns an element if any contenteditable element monitored by MediumEditor currently has focused
- .getSelectedParentElement(range): get the parent contenteditable element that contains the current selection
- .restoreSelection(): restore the selection to what was selected when
saveSelection()
was called - .saveSelection(): internally store the set of selected text
- .selectAllContents(): expands the selection to contain all text within the focused contenteditable
- .selectElement(element): change selection to be a specific element and update the toolbar to reflect the selection
- .stopSelectionUpdates(): stop the toolbar from updating to reflect the state of the selected text
- .startSelectionUpdates(): put the toolbar back into its normal updating state
Editor Action Methods
- .cleanPaste(text): convert text to plaintext and replace current selection with result
- .createLink(opts): creates a link via the native
document.execCommand('createLink')
command - .execAction(action, opts): executes an built-in action via
document.execCommand
- .pasteHTML(html, options): replace the current selection with html
- .queryCommandState(action): wrapper around the browser's built in
document.queryCommandState(action)
for checking whether a specific action has already been applied to the selection.
Helper Methods
- .delay(fn): delay any function from being executed by the amount of time passed as the
delay
option - .getExtensionByName(name): get a reference to an extension with the specified name
- .serialize(): returns a JSON object with elements contents
- .setContent(html, index): sets the
innerHTML
tohtml
of the element atindex
Capturing DOM changes
For observing any changes on contentEditable, use the custom 'editableInput'
event exposed via the subscribe()
method:
var editor = new MediumEditor('.editable');
editor.subscribe('editableInput', function (event, editable) {
// Do some work
});
This event is supported in all browsers supported by MediumEditor (including IE9+)! To help with cases when one instance of MediumEditor is monitoring multiple elements, the 2nd argument passed to the event handler (editable
in the example above) will be a reference to the contenteditable element that has actually changed.
This is handy when you need to capture any modifications to the contenteditable element including:
- Typing
- Cutting/Pasting
- Changes from clicking on buttons in the toolbar
- Undo/Redo
Why is this interesting and why should you use this event instead of just attaching to the input
event on the contenteditable element?
So for most modern browsers (Chrome, Firefox, Safari, etc.), the input
event works just fine. Infact, editableInput
is just a proxy for the input
event in those browsers. However, the input
event is not supported for contenteditable elements in IE 9-11.
So, to properly support the editableInput
event in Internet Explorer, MediumEditor uses a combination of the selectionchange
and keypress
events, as well as monitoring calls to document.execCommand
.
Extensions & Plugins
Check the documentation in order to learn how to develop extensions for MediumEditor.
A list of existing extensions and plugins, such as Images and Media embeds, Tables and Markdown can be found here.
Development
MediumEditor development tasks are managed by Grunt. To install all the necessary packages, just invoke:
npm install
To run all the test and build the dist files for testing on demo pages, just invoke:
grunt
These are the other 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
- spec: runs a task against a specified file
The source files are located inside the src directory. Be sure to make changes to these files and not files in the dist 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'
) without files from the dist directory. - Push to the branch (
git push origin my-new-feature
) - Create new Pull Request
Code Consistency
To help create consistent looking code throughout the project, we use a few tools to help us. They have plugins for most popular editors/IDEs to make coding for our project, but you should use them in your project as well!
JSHint
We use JSHint on each build to find easy-to-catch errors and potential problems in our js. You can find our JSHint settings in the .jshintrc
file in the root of the project.
jscs
We use jscs on each build to enforce some code style rules we have for our project. You can find our jscs settings in the .jscsrc
file in the root of the project.
EditorConfig
We use EditorConfig to maintain consistent coding styles between various editors and IDEs. You can find our settings in the .editorconfig
file in the root of the project.
Easy First Bugs
Looking for something simple for a first contribution? Try fixing an easy first bug!
Contributors (100+ and counting!)
https://github.com/yabwe/medium-editor/graphs/contributors
License
MIT: https://github.com/yabwe/medium-editor/blob/master/LICENSE