What is a good jquery plugin to do general text processing like highlighting words and stuff like that?

I'm not really too familiar with jquery plugins. I don't even know what I would search for, or which plugin has good activity. Jquery might even have the code built inside and I am just not aware.

Basically what I'd 开发者_开发知识库like is a plugin to do some "behind the scenes" text processing - not a WYSIWYG. Things like this:

1. Highlight words given some html or a text fragment. Basically it would let me put 'span' tags and let me wrap those words with a provided css class.

2. Look for a word inside of a given html text, and have it give me a snippet of text where I get X characters before the word and X characters after the word with "..." on either side.

3. A way to simply say, "Get rid of all the 'image' tags" in this text block (these are not html - just text).

Is there anything like this that is widely used, robust, etc? I'd rather not have to code this stuff from scratch.

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so for your searching, jquery's really not built for the whole string manipulation thing, so i generally drop into regular old javascript and do something like this:

var search = 'some'
var matchIdx = $('body').text().search(search);
var charBefore = 5;
var charAfter = 6;
var startingIdx = matchIdx - charBefore;
var endingIdx = matchIdx + search.length + charAfter;

console.log($('body').text())
console.log(matchIdx);
console.log($('body').text().substring(startingIdx,endingIdx));

see it working in this jsfiddle

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Codemirror http://codemirror.net/ is nice one. I'm using it for my projects.

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Highlight plugin: http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html