如何使用JavaScript在网页上运行正则表达式

Question

I'm trying to make a bit of a crude ad-blocker with javascript The code I currently have:

var pattern = '<iframe(.*?)</iframe>|<object(.*?)</object>';

if (document.body.parentNode.innerHTML.match(pattern)) 
{
    document.body.parentNode.innerHTML =
        document.body.parentNode.innerHTML.replace(pattern, '<b>AD BLOCKED</b>');
}

The problem is that the page reloads. Is there a way I can stop the page from reloading? (My main target is adsense)

Answer 1

This does not seem right, since you're just wanting to replace the html on the page. I can't imagine what that will do. To answer your Regex question, though, try this.

var pattern = /<iframe.*<\/iframe>/gi;
document.body.innerHTML = 
    document.body.innerHTML.replace(pattern, '<strong>bye iframe</strong>');

replace() will swap out all the matches found by the RegExp with the second parameter.

/<iframe.*<\\/iframe>/ is a regular expression matching anything within iframe tags. gi modifies the regex telling it to be global and case-insensitive.

Again, you will probably have some unexpected behavior rewriting the innerHTML of the body, so I'd rethink your approach. Perhaps you could use jQuery to find the tags you don't want and hide or remove them. ( example here )