问题
What I want to do is replace all instances of 'foo' in a webpage with 'bar' in a JS bookmarklet/greasemonkey script. How can I do this? I suppose jQuery works, as there're hacks to include those in both bookmarklets and greasemonkey scripts.
回答1:
This script iterates through each element in the document and replaces every instance of foo with bar.
The gi modifiers on the regex make it do a global, case-insensitive search.
var els = document.getElementsByTagName("*");
for(var i = 0, l = els.length; i < l; i++) {
var el = els[i];
el.innerHTML = el.innerHTML.replace(/foo/gi, 'bar');
}
You can target specific tag names by changing the "*" to the tag name of your choice (e.g. "p", "td").
来源：https://stackoverflow.com/questions/1155353/find-and-replace-in-a-webpage-using-javascript