javascript regex in chrome extension

Question

Okay, a little context. I want to modify some crappy HTML on a page that I use a lot. I'm doing this via my content_script "js", as defined in the manifest.json file of the chrome extension. The primary method I've been using is this sort of ugly thing:

var str1 = 'something already on the page'; var str2 = 'something already on the page, plus some extra stuff'; document.body.innerHTML = document.body.innerHTML.replace(str,st2);

I'm mostly trying to re-order form objects, and expand them a little to show more information, and filter/condense them to be less superfluous. I'd appreciate any pointer as to a better way to do this.

Anyway... here's my specific problem.

I want to retrieve pistol (or any string) from the following:

<form action="map.cgi?use-o" method="post" class="a"><input type="submit" value="pistol" class="m"\></form>

I tried every variation of the following:

str.exec(/value="([^]+)" class/);

and I'm either getting null or junk strings that I don't want. Ideas?

Thanks!

Why are you using regex, why not use html dom functions

Downgoat
– Downgoat

2015-04-13 01:37:32 +00:00
Commented Apr 13, 2015 at 1:37 — Downgoat
– Downgoat, Commented Apr 13, 2015 at 1:37
You are better off to use JavaScript code for it

MaxZoom
– MaxZoom

2015-04-13 01:37:45 +00:00
Commented Apr 13, 2015 at 1:37 — MaxZoom
– MaxZoom, Commented Apr 13, 2015 at 1:37

MaxZoom · Accepted Answer · 2015-04-13 02:13:57Z

1

If you insist on regex, then use below one:

(?:value=")([^"]+)

Here is DEMO

Using JavaScript it will look like:

var value = document.querySelectorAll("input[type=submit]")[0].value;

edited Apr 13, 2015 at 2:13

answered Apr 13, 2015 at 1:41

MaxZoom

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2 Comments

mic angelo Over a year ago

does this just look for the string "input[type=submit]" or is it more intelligent than that somehow? also, are you missing an open parenthesis?

MaxZoom Over a year ago

It takes the first input submit on the page. I can not see your whole page, but it will work for provided code.

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