Browser extension to check substring in html code from website

Question

var str = document.getElementsByTagName('body');
str.toString();
var substring = "raju";
if(str.includes(substring)){
alert('found');
}

i want to parse the html as string for a particular website and checking for substring in that html code. But it not working, please help!

Have you tried `document.body.innerText` instead of `toString()` on the array? — user3297291, Oct 15 '18 at 13:16

score 0 · Answer 1 · answered Oct 15 '18 at 13:18

You should add [0] to get first element from DOM collection and then access innerText property. toString is useless, hence removed

var str = document.getElementsByTagName('body')[0].innerText;
var substring = "raju";
if(str.includes(substring)){
alert('found');
}

score 0 · Answer 2 · answered Oct 15 '18 at 13:19

0

You should use document.body.innerHTML to get the HTML contents in a string. Example:

const str = document.body.innerHTML;
const substring = "raju";

if (str.includes(substring)){
 alert('found');
}

answered Oct 15 '18 at 13:19

Karolis Ramanauskas

1,045
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14

score 0 · Answer 3 · answered Oct 15 '18 at 13:25

0

Includes is not supported on Internet Explorer. According to the MDN, so best way to do that is use indexOf

var str = document.body.innerHTML;
var substring = "raju";
if(str.indexOf(substring) >= 0) {
//your stuff
}

answered Oct 15 '18 at 13:25

Negi Rox

3,828
1
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@EdwinShakil please accept the answer if it worked for you – Negi Rox Oct 22 '18 at 05:57

score 0 · Answer 4 · answered Dec 06 '19 at 15:04

This works and other suggested functions shouldn't be used. Ref: How to get the entire document HTML as a string?

    const str =new XMLSerializer().serializeToString(document)
    const substring = "raju";
    
    if (str.includes(substring)){
     alert('found');
    }

Browser extension to check substring in html code from website

4 Answers4