my-autolink

my-autolink is my autolinker for me.

Install

npm install my-autolink

TypeScript support

TypeScript declaration file (.d.ts) is provided. TypeScript will automatically find typing information for this module. TypeScript 3.0 or later is required.

Sample

const autolink = require('my-autolink').autolink;
 
console.log(autolink('Go to http://example.net/ now!'));
// -> "Go to <a href='http://example.net/'>http://example.net/</a> now!"

The result is escaped by escape-html.

API

autolink(text[, transforms][,options])

Returns text with a tags added.

• transforms: an array of a string or a Transform Object explained below. Defaults to ["url"], where "url" means the built-in transform that turns a url into a link
• options: options passed to built-in transforms.
  • url: passed to "url" transform.
    • requireSchemes: If set to false, urls that start with hostname is converted to link. (example: example.net/foo/bar to <a href='http://example.net/foo/bar'>example.net/foo/bar</a>) Defaults to true.
    • schemes: Array of schemes allowed. Default value is ["http","https"]. Set to the string "*" to accept any scheme.
    • attributes: Object specifying the attributes of generated a elements.
    • text: Function which takes a URL and returns a text for link.

compile(transforms, options)

Returns a reusable precompiled option object which can be passed to the autolink function. RegExp object is cached in it for speedup.

const { autolink, compile } = require('my-autolink');
 
const options = compile(['url'], {
  url: {
    attributes: {
      target: '_blank',
    },
  },
});
 
console.log(autolink('Go to http://example.net/ now!', options));
// -> "Go to <a target='_blank' href='http://example.net/'>http://example.net/</a> now!"

Transform Object

Custom autolinks can be defined by Transform Object, which consist of two methods:

• pattern: receives the object options and returns RegExp.
• transform: receives options and subsequent arguments provided by RegExp#exec and returns object that represents attributes of the a element. This object may have the extra field text to represent the text of link.

Note that RegExps returned by pattern must have its global flag set.

Examples

The simplest example:

{
  pattern: function(){ return /article\/(\d+)/g; },
  transform: function(_, text, num){
    return {
      href: "/path/to/article/"+num
    }
  }
}

This Transform Object converts the text article/1234 into <a href='/path/to/article/1234'>article/1234</a>.

Changelog

• 0.2.0:
  • Add the compile function.
  • Refined type definition.
    • Breaking change: TypeScript 3.0 or later is now required.
  • Updated ES version.
    • Breaking change: support for Symbol and Object.assign is now required.
• 0.1.0: Add text option to url transform.
• 0.0.3: Update dependencies. Reform internal structure.
• 0.0.2: Add attributes option to url transform.
• 0.0.1

License

MIT