tiny-markdown-editor
v0.1.29
Published
TinyMDE: A tiny, ultra low dependency, embeddable HTML/JavaScript Markdown editor.
Downloads
2,977
Readme
tiny-markdown-editor
TinyMDE: A tiny, low-dependency(1) embeddable HTML/JavaScript Markdown editor.
(1): TinyMDE's runtime only depends on core-js
for polyfills to support older browsers.
Visit the demo page to see TinyMDE in action.
Overview
TinyMDE is an in-browser markdown editor that allows editing Markdown files with in-line formatting previews (bold, italic, headings, code etc.) as well as a toolbar with familiar point-and-click or keyboard shortcut interaction.
TinyMDE can be used as a drop-in text area replacement.
Motivation
TinyMDE was motivated by wanting to improve on EasyMDE which is extremely flexible but had two shortcomings:
- EasyMDE depends on Code Mirror for editing and formatting. CodeMirror is a full fledged and customizable in-browser code editor, and has a price: EasyMDE's JS file is 280kb in size. TinyMDE is less than 70kb (less than a quarter of EasyMDE's size), the "tiny" version without the toolbar even below 60kb!
- CodeMirror doesn't work well on mobile, at least not for writing prose: mobile phone OS auto-correction functionality, which many people rely on to quickly type on mobile, is not supported by CodeMirror.
Install TinyMDE
You can install TinyMDE from NPM (e.g., if you want to use it in a bundled JS application using Webpack or Rollup), use a hosted version, or self-host the JavaScript and CSS files.
Install TinyMDE from NPM
Install the tiny-markdown-editor
package from NPM:
npm install --save tiny-markdown-editor
Then, in your JavaScript file, simply import the package like this:
const TinyMDE = require('tiny-markdown-editor');
var tinyMDE = new TinyMDE.Editor({element: 'editor'});
Bundle the JavaScript with your favorite bundler like Webpack or Rollup to ensure the TinyMDE code gets included in the shipped JavaScript file.
Please note: If you go down the NPM package route, you will also need to make sure to style the components. After installing TinyMDE from NPM, you will find a CSS file tiny-mde.css
you can use as a base in the directory node_modules/tiny-markdown-editor/dist
.
Hosted version
You can simply include the JavaScript and CSS files from Unpkg on your website, using the following code:
<script src="https://unpkg.com/tiny-markdown-editor/dist/tiny-mde.min.js"></script>
<link
rel="stylesheet"
type="text/css"
href="https://unpkg.com/tiny-markdown-editor/dist/tiny-mde.min.css"
/>
Self-host
To self-host TinyMDE, follow these steps:
- Download and build TinyMDE. Alternatively, download the newest release and unpack the archive.
- Copy the output JS and CSS files
tiny-mde.min.js
andtiny-mde.min.css
from thedist
directory to your website's directory. - Include these files on your website:
<script src="tiny-mde.min.js"></script> <link rel="stylesheet" type="text/css" href="tiny-mde.min.css" />
Creating an editor and toolbar on your page
Simple creation
To create a simple editor as child of an HTML div
element with the ID editor
, use the following HTML / JS code:
<div id="editor"></div>
<script type="text/javascript">
var tinyMDE = new TinyMDE.Editor({ element: "editor" });
</script>
Command bar creation
To create a toolbar (command bar) along with the editor, create another container div (here called toolbar
), and instantiate editor and toolbar as follows:
<div id="toolbar"></div>
<div id="editor"></div>
<script type="text/javascript">
var tinyMDE = new TinyMDE.Editor({ element: "editor" });
var commandBar = new TinyMDE.CommandBar({
element: "toolbar",
editor: tinyMDE,
});
</script>
Creation from a textarea
TinyMDE can be used as a drop-in textarea replacement. This means that when TinyMDE is passed a textarea, the editor will act as if the user is directly editing the textarea: The editor is initialized with the content of the textarea, and changing text in the editor changes the textarea's content. The easiest code to do so is as follows:
<div class="txtcontainer">
<textarea id="txt">This is some **Markdown** formatted text</textarea>
</div>
<script type="text/javascript">
var tinyMDE = new TinyMDE.Editor({ textarea: "txt" });
</script>
Please note:
- The editor doesn't quite replace the textarea. The textarea just gets hidden, and the editor content is mirrored in the textarea. If you programmatically change the contents of the textarea, the editor would get out of sync.
- The editor element will be inserted in the DOM as a sibling of the textarea element. In order to size and format the editor element properly, apply styles to the parent element of the textarea (in the example above,
div.txtcontainer
).
Configure TinyMDE
Editor constructor parameters
TinyMDE.Editor
takes as argument a key-value object with the following possible attributes:
| Attribute | Description |
| ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| element
| The DOM element under which the TinyMDE DOM element will be created. The element
attribute can be given as either an ID or the DOM element itself (i.e., the result of a call to document.getElementById()
). |
| content
| The initial content of the editor, given as a string. May contain newlines. |
| textarea
| The textarea that will be linked to the editor. The textarea can be given as an ID or as the DOM element itself (i.e., the result of a call to document.getElementById()
). The content of the editor will be reflected in the value of the textarea at any given point in time. If textarea
is given and content
isn't, then the editor content will be initialized to the textarea's value. If textarea
is given and element
isn't, then the editor element will be created as the next sibling of the textarea element. |
If neither element
not textarea
are given, the editor element will be created as the last child element of the body
element (probably not what you want in most cases, so you probably want to pass at least one of element
or textarea
).
If neither content
nor textarea
are given, the content of the editor is initialized with a placeholder text (# Hello TinyMDE!\nEdit **here**
). This is probably not what you want, so you probably want to pass at least one of content
or textarea
.
CommandBar constructor parameters
TinyMDE.Editor
takes as argument a key-value object with the following possible attributes:
| Attribute | Description |
| ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| element
| The DOM element under which the command bar DOM element will be created. The element
attribute can be given as either an ID or the DOM element itself (i.e., the result of a call to document.getElementById()
). If element
is not given, the commandbar will be created as the last child of the body
element (probably not what you want in most cases). |
| editor
| The editor object that this command bar will be linked to (i.e., the return value of new TinyMDE.Editor()
). |
| commands
| The list of commands to show. See below. |
Customizing commands
In order to customize the commands shown on the command bar, pass an array to the commands
attribute. Each of the entries of the array defines one command bar element (button or separator), left to right. Each of the entries of the commands
array can be one of the following:
- A string with the content
|
(vertical pipe), which will create a separator line. - A string with one of the command identifiers
bold
,italic
,strikethrough
,code
,h1
,h2
,ul
,ol
,blockquote
,hr
,insertLink
, orinsertImage
, which will create the default button for that command - A key-value object to create a customized or custom button.
If an entry of the commands
array is an object, you can either customize one of the existing commands (e.g., use a different icon or keyboard shortcut for the bold
command), or use a completely custom command. An object entry of the commands
array can contain the following attributes:
| Attribute | Description |
| ------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| name
mandatory | A string that is unique within the scope of this CommandBar instance that identifies the command. If one of the default commands (bold
, italic
, strikethrough
, code
, h1
, h2
, ul
, ol
, blockquote
, hr
, insertLink
, or insertImage
) is given as the name
attribute, then the command is initialized with all the default values of the default commands and they can be overridden by specifying additional attributes. In other words, { name: 'bold' }
as a command array entry behaves the same as 'bold'
. If the name
attribute is set to a string other than one of the default command, a custom command can be defined. |
| title
| The title of the command, shown as a tooltip on hover. Defaults to be the same as name
. |
| innerHTML
| The HTML content of the command button. In the default styling, the content will have a space of 18x18 CSS pixels. |
| action
| For custom commands, you need to set the action
attribute to a function taking the Editor object as a parameter, for example: action: editor => { editor.setContent('Test')}
. |
| hotkey
| A keyboard shortcut for the command. The keyboard shortcut needs to be a string containing a key (e.g., 'A' or '1'), preceded by one or more modifier keys (Ctrl
, Shift
, Alt
, Cmd
, Win
, Option
), each separated with -
. Examples: Alt-I
, Ctrl-Shift-3
. There are two convenience modifier keys that are recognized for easy cross-platform development: Mod
is set to Cmd
on macOS / iOS / iPadOS and Ctrl
elsewhere (e.g., Mod-B
as a shortcut for the bold
command ends up as either Ctrl
+ B
or ⌘
+ B
); Mod2
is set to Option
on macOS / iOS / iPadOS and Alt
elsewhere. |
The default array of commands is as follows: ['bold', 'italic', 'strikethrough', '|', 'code', '|', 'h1', 'h2', '|', 'ul', 'ol', '|', 'blockquote', 'hr', '|', 'insertLink', 'insertImage']
.
Editor methods
Here are some methods of the Editor object that might be useful in general interaction or custom CommandBar commands:
| Method | Description |
| ----------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| getContent()
| Returns the content of the editor as a string. |
| setContent(content)
| Sets the content of the editor to the string content
. |
| getSelection(getAnchor)
| Gets the current selection / cursor position inside the editor. The parameter getAnchor
(defaults to false) determines if the anchor (starting point) of the selection should be returned—if getAnchor
is false (or omitted), the focus (end point) is returned, otherwise the starting point. If the selection is not inside the editor, null
is returned. The method returns an object with the attributes row
and col
which contain the zero-based row (line) and column number of the selection position. |
| setSelection(focus, anchor)
| Sets the selection within the editor. The parameters focus
and offset
are both of the format returned by getSelection()
(containing attributes row
and col
). If anchor
is null
or omitted, a single-point selection (cursor position) will be set. |
| paste(text, anchor, focus)
| Pastes / inserts text over either the current selection (if anchor
and focus
are null or omitted) or a specific range (if anchor
and focus
are passed in in the format as returned by getSelection()
). |
| wrapSelection(pre, post, anchor, focus)
| Wraps the current selection (if anchor
and focus
are null
or omitted) or a specific selection (if anchor
and focus
are given) in the strings pre
and post
. For example, wrapSelection('[', '](https://www.github.com)')
will wrap the selection with a link to GitHub. |
| addEventListener(type, listener
) | Adds an event listener to the editor. type
is a string denoting the type (change
or selection
), and listener
is a function which takes one parameter, the event. |
Event listeners
There are two event listener types that can be registered on the editor: change
and selection
.
change
event
A change
event is fired any time the content of the editor changes. The event object passed to the listener function contains the following properties:
| Attribute | Description |
| --- | ----------- |
| content
| The current content as a string. |
| linesDirty
| An array of booleans, which for each line contains true
if the line might have changed in terms of either its content or its block type since the last change, and false
if the line is guaranteed to not have changed. |
selection
event
A selection
event is fired any time the selection within the editor changes. The event object passed to the listener function contains the following properties:
| Attribute | Description |
| --- | ----------- |
| focus
| The focus (end point) of the current selection, in the format as returned by getSelection()
(two attributes row
and col
denoting the zero based row and column). |
| anchor
| The anchor (start point) of the current selection, in the format as returned by getSelection()
(two attributes row
and col
denoting the zero based row and column). |
| commandState
| An array which contains an attribute for every default command name bold
, italic
, strikethrough
, code
, h1
, h2
, ul
, ol
, blockquote
, hr
, insertLink
, and insertImage
). The value of each attribute is one of true
, false
, or null
. The value is true
if the command is currently active (e.g., if the cursor is within a bold stretch of text, then the state for bold
will be true
). The value is false
if the command is currently inactive but could be activated (e.g., if the selection encompasses a stretch of text that could be bolded, then the state for bold
will be false
). The value is null
if the command is currently not applicable (e.g., if the cursor is within a code block where inline formatting is not available, the state will be null
for bold
). |
drop
event
A drop
event is mirroring a native drop
event. It was added to TinyMDE to allow drag & dropping images into Markdown textarea (like on Github). The event object passed to the listener function contains the following properties:
| Attribute | Description |
| --- | ----------- |
| dataTransfer
| The event's DataTransfer data (dropped files). |
Here's how to add image drag & drop to your TinyMDE editor:
editor.addEventListener("drop", function (event) {
let formData = new FormData();
// You can add use event.dataTransfer.items or event.dataTransfer.files
// to build the form data object:
for (let i = 0; i < event.dataTransfer.items.length; i++) {
if (event.dataTransfer.items[i].kind === "file") {
let file = event.dataTransfer.items[i].getAsFile();
formData.append("image", file);
}
}
// Call your API endpoint that accepts "Content-Type": "multipart/form-data"
// requests and responds with the image names and URL-s.
//
// Now you can add Markdown images like so:
editor.paste(`![${imageName}](${imageUrl})`);
});
Styling TinyMDE
In order to style TinyMDE, edit the CSS file. You can see the classes that can be assigned styles within the file. For a bit more detail about the classes, read on.
Editor styling
There are some generally interesting CSS classes that can be formatted. Most of them start with TM
, short for TinyMDE
.
TinyMDE
is the editor element.TMMark
is any markup. Any element with the classTMMark
will also have another class calledTMMark_*
, where*
is replaced by the class name of the respective block or inline style. For example, in a H1 line with the content# Heading 1
, the#
is contained in an element with the classesTMMark TMMark_TMH1
.TMInlineFormatted
contains text that is inline formatted.
The following classes denote Markdown blocks: TMPara
, TMBlankLine
, TMH1
, TMH2
, TMH3
, TMH4
, TMH5
, TMH6
, TMBlockquote
, TMCodeFenceBacktickOpen
, TMFencedCodeBacktick
, TMCodeFenceBacktickClose
, TMCodeFenceTildeOpen
, TMFencedCodeTilde
, TMCodeFenceTildeClose
, TMSetextH1
, TMSetextH1Marker
, TMSetextH2
, TMSetextH2Marker
, TMHR
, TMUL
, TMOL
, TMIndentedCode
, TMLinkReferenceDefinition
, TMHTMLBlock
.
The following classes denote Markdown inline formatted stretches of text: TMCode
, TMAutolink
, TMHTML
, TMStrong
, TMEm
, TMStrikethrough
, TMImage
, TMLink
, (TMLinkLabel
(also marked as TMLinkLabel_Valid
or TMLinkLabel_Invalid
depending on whether or not the label references a valid reference), TMLinkDestination
, TMLinkTitle
, TMImageDestination
, TMImageTitle
.
Each line of a code fenced blocks (ie. starting and ending with ```
or ~~~
) will also be wrapped in an element with the class TMFencedCode
. Each line of an HTML block (ie. starting with an HTML element) will also be wrapped in an element with the class TMHTMLContent
.
CommandBar styling
The main toolbar element has the class TMCommandBar
. Buttons have the class TMCommandButton
, with an additional class of TMCommandButton_Active
, TMCommandButton_Inactive
, or TMCommandButton_Disabled
, depending on the state of the respective command. Divider elements have the class TMCommandDivider
.
Build TinyMDE
Building TinyMDE is pretty straight forward:
- Clone this repository:
git clone [email protected]:jefago/tiny-markdown-editor.git
- In the repository directory, install dependencies and build the project:
npm install
# You may need to run npm install --force
npm run prepublishOnly
The latter command generates the dist
and lib
directories. You will find the following files there:
dist/tiny-mde.css
anddist/tiny-mde.min.css
: CSS files to style the editor. These can be edited at will to make the editor look like you want to.dist/tiny-mde.min.css
has the same content asdist/tiny-mde.css
, it's just minified. You will only need to use one of the files on your page. If you want to edit the CSS file, it's easier to editdist/tiny-mde.css
and then minify the edited version.dist/tiny-mde.js
: Debug version of the editor. The JS file is not minified and contains a sourcemap. It is not recommended to use this in production settings, since the file is large.dist/tiny-mde.min.js
: Minified JS file for most use cases. Simply copy this to your project to use it.dist/tiny-mde.tiny.js
: Minified and stripped-down JS file. Contains only the editor itself, not the toolbar.