check a variable type javascript code example

Example 1: check data type in javascript

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

Example 2: how to get type of variable in javascript

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

Example 3: javascript check type of variable var

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