print type of variable javascript code example

Example 1: check data type in javascript

typeof("string"); //string
typeof(123); //number

Example 2: get type of var js

var x = 12345; 
console.log(typeof x) // number
x = 'string'; 
console.log(typeof x) // string
x = { key: 'value' };
console.log(typeof x) // object

Example 3: javascript check type of variable var

> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"