js element exists
var element = document.getElementById("test");
//If it isn't "undefined" and it isn't "null", then it exists.
if(typeof(element) != 'undefined' && element != null){
alert('Element exists');
} else{
alert('Element does not exist');
}check if an element is there in js
//includes
const fruits = ["apple", "mango", "banana", "kiwi"]
return fruits.includes("mango") ? true : false; //returns true if element is in the array
//find Index
let matchIndex = fruits.findIndex((fruit)=>{return fruit == "mango"});
matchIndex > -1 ? fruits[matchIndex] : null;
//other than -1 means the element is in the array.Copyright © 2021 Codeinu
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