How to get a key in a JavaScript object by its value ?

How to get the native type of a value in JavaScript ?

Last Updated : 15 Feb, 2023

JavaScript variables can store any type of value. The JavaScript typeof operator can be used to find out the native type of value.

It returns a string value indicating the type of the value.

Syntax:

typeof(value)

Possible output values of typeof:

Type	Result
undefined	"undefined"
null	"object"
boolean	"boolean"
number	"number"
string	"string"
symbol	"symbol"
function	"function"
object	"object"

Example:

HTML

<!DOCTYPE html>
<html>
  <body>
    <h2>Function returns native type of the value</h2>
    <strong>Output: </strong><br />
    <div id="output"></div>
    <script>
      document.getElementById("output").innerHTML =
        typeof 98 + " " + typeof "geeksforgeeks" + " " + typeof null;
    </script>
  </body>
</html>

Output:

How to get a key in a JavaScript object by its value ?

S

swapnil074

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