javascript queryselecteor code example
Example 1: dom queryselector
// TO select all the h1 from Html
document.querySelectorAll("h1")
//To select h1 from a particular class or id
document.querySelector(".className/#id h1")
Example 2: document.queryselector
<div id="foo\bar"></div>
<div id="foo:bar"></div>
<script>
console.log('#foo\bar');
document.querySelector('#foo\bar');
console.log('#foo\\bar');
console.log('#foo\\\\bar');
document.querySelector('#foo\\\\bar');
document.querySelector('#foo:bar');
document.querySelector('#foo\\:bar');
</script>