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JavaScript jQuery Basics Introducing jQuery jQuery vs. JavaScript

Vijayalaxmi vastrad
Vijayalaxmi vastrad
2,789 Points
Posted by Vijayalaxmi vastrad
Vijayalaxmi vastrad
2,789 Points

I try to use getElementByClassName to disappear Green box but it did not work can anyone pls tell me why?

const box=document.getElementByClassName('box'); box.style.display='none';

2 Answers

Haitham Rizk
Haitham Rizk
631 Points

Hey, it should be get Element(s) not get (Element), so you can try it like this:

const box=document.getElementsByClassName('box');

also getElementsByClassName should return an array of all elements in your page that has class 'box', so box.style.display will not work because box here is an array of elements. so you should loop over this array and set the display style for each element in the array:

for(let i=0; i < box.length; i++){ box[i].style.display='none'; }

Diego Alvarez
Diego Alvarez
6,680 Points

Or you can just select it, for example, if it's the first item in the array :

const box = document.getElementsByClassName('box')[0];