How can I find a tag inside a document in Javascript

Question

I want to find out if the document -which is an html file- has "some" tags. If so, I want to get all its attributes.

I tried

var data = require('test.html');
if(data.toLowerCase().indexOf('<iframe') > -1|| data.toLowerCase().indexOf('<iframe>') > -1){
 console.log('yeaaah it exist'); 

 // get iframe attributes
}

I was able to find if the tag exist, but how can I get its attributes? Also this is on server side.

Hint: what does the indexOf() method return when a string isn't found? — nnnnnn, Feb 05 '16 at 13:53
i just made chances to the code.. for some reasons it returns false if indexOf() matches the string.... so i simply use '!'.. Now iam able to determine that the tag exist.. How do i get its arrtibutes? — gabf Hahn, Feb 05 '16 at 13:58
No, indexOf() doesn't return true or false, it returns a number. Using ! doesn't really fix the problem, it just seems that way because you didn't test all the possibilities. — nnnnnn, Feb 05 '16 at 14:02
You can't require `html` files like that then. You'll need to read the file. — MinusFour, Feb 05 '16 at 14:09

gabf Hahn · Answer 1 · 2016-02-05T19:05:04.327

0

Okay, I got it done using Cheerio

var cheerio = require("cheerio");
var url = "./test.html";  // if it does not work try with absolute url
download(url, function(data) {
if (data) {
// console.log(data);
var TestData = cheerio.load(data);
// to get the tag simply use TestData("sometag")
console.log(TestData("sometag").length);
 }
});

edited Feb 05 '16 at 19:05

answered Feb 05 '16 at 18:59

gabf Hahn

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How can I find a tag inside a document in Javascript

1 Answers1