test if is undefined javascript
let id;
if(typeof id === 'undefined') {
console.log("id is undefined...");
}test if is undefined javascript
let id;
if(typeof id === 'undefined') {
console.log("id is undefined...");
}check if variable is undefined or null jquery
if (variable == null) {
// variable is either null or undefined
}Copyright © 2021 Codeinu
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