using querySelector code example

Example 1: js queryselector names

// This selects the first element with that name
document.querySelector('[name="your-selector-name-here"]');

Example 2: queryselector javascript

var element = document.querySelector("#myid .myclass p");

Example 3: 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")