Auto-link

Auto-link is an npm package that replaces URLs in text with HTML links, ignore the URLs within a href/pre tag.

Installation

npm install --save auto-link

Usage

var autoLink = require('auto-link');

Using the link() method:

var html = autoLink.link(text[, options]);

Example

var html = autoLink.link('<p>Welcom to www.google.com</p>');
//<p>Welcom to <a href="http://www.google.com">www.google.com</a></p>

Options

These are specified by providing an Object as the second parameter to autoLink.link().

• target: String or Boolean
  A target attribute will be added to the replaced href tag if the target option is a String value. false means that do not add target attribuite.
  Default value is false.
  e.g.

autoLink.link('<p>Welcom to www.google.com</p>', {
    target: '_blank'
});
//<p>Welcom to <a href="http://www.google.com" target="_blank">www.google.com</a></p>

• attrs: Object
  The attributes you want to add to the replaced href tag. e.g.

autoLink.link('<p>Welcom to www.google.com</p>', {
    attrs: {
        class: 'mylink',
        name: 'mylink1',
        id: 'mylink2'
    }
});
//<p>Welcom to <a href="http://www.google.com" class="mylink" name="mylink1" id="mylink2">www.google.com</a></p>

• ignore.tags: Array[String]
  The URLs text within some tags should not be replaces. for example: <a href="http://www.google.com">www.google.com</a> should NOT be replaced to <a href="<a href="http://www.google.com">http://www.google.com</a>"><a href="http://www.google.com">www.google.com</a></a>. So the The URLs text within ignore.tags won't be replaced.
  Defaults value is ['a', 'pre', 'code', 'textarea'].
  e.g.

autoLink.link('<p>Welcom to <a href="http://www.google.com">www.google.com</a></p>');
//<p>Welcom to <a href="http://www.google.com">www.google.com</a></p>
 
autoLink.link('<p>Welcom to www.google.com</p>, <span>www.stackoverflow.com</span> and <pre>www.github.com</pre>', {
        ignore: {
            tags: ['p', 'span']
        }
    });
//<p>Welcom to www.google.com</p>, <span>www.stackoverflow.com</span> and <pre><a href="http://www.github.com">www.github.com</a></pre>

• ignore.classes: Array[String]
  The same with ignore.tags, but it's for CSS classes.
  Defaults values is ['hljs'].

e.g.

autoLink.link('<p class="hljs">Welcom to www.google.com <span class="myclass">and www.github.com</span></p>', {
        ignore: {
            classes: ['myclass']
        }
    });
//<p class="hljs">Welcom to <a href="http://www.google.com">www.google.com</a> <span class="myclass">and www.github.com</span></p>

• ignore.fn: Function
  Sometimes it's hard to filter the elements by tags and CSS classes. so the ignore.fn is used to filter the elements which you want to ignore. The function has a JSDOM element as it's parameter, it should retrun a boolean value to specify the element ignores or not.
  If enable the ignore.fn option, the ignore.tags and ignore.classes options will be invalidated.
  e.g.

autoLink.link('<p id="hljs">Welcom to www.google.com <span id="myid1">and www.github.com</span></p>', {
        ignore: {
            fn: function(ele) {
                return ele.attr('id') && ele.attr('id').indexOf('myid') > -1;
            }
        }
    });
//<p id="hljs">Welcom to <a href="http://www.google.com">www.google.com</a> <span id="myid1">and www.github.com</span></p>

Tests

$ npm install -g mocha

npm test