how to use queryselector in javascript code example

Example 1: queryselector

var el = document.querySelector(".myclass");

Example 2: javascript queryselector

//Pretend there is a <p> with class "example"
const myParagraph = document.querySelector('.example');
//You can do many this with is
myParagraph.textContent = 'This is my new text';

Example 3: queryselector javascript

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

Example 4: queryselector function in javascript

/*The querySelector() method returns the first element that matches a specified 
CSS selector(s) in the document. Note: The querySelector() method only returns 
the first element that matches the specified selectors. To return all the 
matches, use the querySelectorAll() method instead.*/

// for example 

//for class
document.querySelector(".ClassName")

// for id 
document.querySelector("#ID")

// etc.

Example 5: query selector js

element = document.querySelector(sélecteurs);

Example 6: js queryselector

const para = document.querySelectorAll('p');