Here’s a jQuery plugin I wrote that’ll add HTML5 <mark> tags around keywords or phrases in an element’s body text.
What is mark?
a run of text in one document marked or highlighted for reference purposes, due to its relevance in another context
http://www.whatwg.org/specs/web-apps/
Usage
Add the script to your page, and then when the DOM is ready, do something like:
$('body').mark('Lorem ipsum');
The plugin can actually be used to wrap any tag around keywords. Simply pass the tag name you want to use as an option:
$('body').mark({
text: 'Lorem ipsum',
tag: 'span',
cssClass: 'mark'
});
The above example will wrap span elements around the words lorem and ipsum. Each span element will have the class ‘mark’. View an example implementation.
TODO
- Input sanitation on the text to be marked. Currently the text is dumped straight into a regular expression. It needs to be escaped so that any regular expression meta-characters are interpreted as literals.
- Similarly, HTML special characters in the input need to be expanded into their HTML entities.
- From what I can see, IE doesn’t like <mark> tags, and seems to automatically self close the opening and closing tags inserted into the DOM. WTF? Can anyone shed any light on this problem? For now, you’re going to have to use a <span> with a CSS class
If you’re interested in contributing, get in touch
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I am using mark dynamically, I intend to use this as a highlighter tool in my webpage.. figuring out a way to select text and clicking on the button to mark text on my web page, then committing the same.
Am i going in a right direction?
Hi,
How can a user select a text an a HTML page and the selected text gets highlighted automatically ?
Presumably you could use something like this to get the selected text: http://www.knowlegezone.com/documents/39/Javascript-Get-Selected-Text–Copy-Selected-Text/
To highlight selected text automatically I guess you could add a mouseup listener on the body tag. As long as no other listener stops propagation the body tag will eventually receive the event. You can then get the selected text using something like http://www.knowlegezone.com/documents/39/Javascript-Get-Selected-Text–Copy-Selected-Text/ and then call the plugin function.
Hi Alan,
Thanks for the link. Could I request for some help in highlighting the text? Can we use tag of HTML 5?
Good stuff. Is it possible though to search and highlight partial word matches? Currently it only finds full word matches.
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