Reputation: 1

Javascript Reg ex help

Could you please provide regular expression for identifying all divs in javascript whose id begins with com

e.g <div id="_com_1">

Thanks for your help

Upvotes: 0

Answers (3)

Reputation: 6334

var divs=document.getElementsByTagName('div');
for(var i=0;i<divs.length;i++){
  if(/^_com/.test(divs[i].id)){
    //do something
  }
}

This assumes the divs are already a part of the DOM.

Upvotes: 1

Reputation: 42026

If you have jQuery on the page, you can use $('div[id^="_com_"]') which is by the way a valid CSS3 selector: div[id^="_com_"].

I would recommend using that instead of regexing through the entire HTML, which might find false positives in text or html comments.

Upvotes: 2

Reputation: 78520

/^_com/.test("_com_1") <-- evaluates to true

would work for this situation, but for simply beginning with com you need

/^com/.test("_com_1") <-- evaluates to false

Upvotes: 0