Javascript - String toLowerCase() Method

The toLowerCase() method converts a string to lowercase letters.

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Description

The toLowerCase() method converts a string to lowercase letters.

The toLowerCase() method does not change the original string.

Syntax 

string.toLowerCase()

Parameters

None

Return

A String, representing the value of a string converted to lowercase

Example

Convert the string to lowercase letters:

Demo

//convert the string to lowercase letters.
var str = "Hello World!";
var res = str.toLowerCase();
console.log(res);//from   w  w  w . j a va  2s.c  o  m

Result