@github/paste-markdown

Paste Markdown objects

• Paste spreadsheet cells and HTML tables as a Markdown tables.
• Paste URLs on selected text as Markdown links.
• Paste text containing links as text containing Markdown links.
• Paste image URLs as Markdown image links.
• Paste markdown as markdown. See @github/quote-selection/Preserving markdown syntax for details.

Installation

$ npm install @github/paste-markdown

Usage

import {subscribe} from '@github/paste-markdown'

// Subscribe the behavior to the textarea.
subscribe(document.querySelector('textarea[data-paste-markdown]'))

Using a library like selector-observer, the behavior can automatically be applied to any element matching a selector.

import {observe} from 'selector-observer'
import {subscribe} from '@github/paste-markdown'

// Subscribe the behavior to all matching textareas.
observe('textarea[data-paste-markdown]', {subscribe})

Excluding <table>s

Some <table>s are not meant to be pasted as markdown; for example, a file content table with line numbers in a column. Use data-paste-markdown-skip to prevent it.

<table data-paste-markdown-skip>
  ...
</table>

Granular control for pasting as plain text

If you're wanting more granular support of pasting certain items as plain text by default, you can pass in the controls config at the subscribe level.

Our config support looks as follows:

import {subscribe} from '@github/paste-markdown'

// Subscribe the behavior to the textarea with pasting URL links as plain text by default.
subscribe(document.querySelector('textarea[data-paste-markdown]'), {defaultPlainTextPaste: {urlLinks: true}})

In this scenario above, pasting a URL over selected text will paste as plain text by default, but pasting a table will still paste as markdown by default.

Only the urlLinks param is currently supported.

If there is no config passed in, or attributes missing, this will always default to false, being the existing behavior.

Development

npm install
npm test

License

Distributed under the MIT license. See LICENSE for details.