make a string lowercase javascript code example

Example 1: javascript lowercase string

var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"

Example 2: how to convert whole strig in lowercase in js

var str = "Hello World!";
var res = str.toLowerCase();

Example 3: javascript lowercase string

var str = "ExaMple";
var res = str.toLowerCase();
output res -> "example"

Example 4: compare string camelcase and lowercase javascript

var haystack = "A. BAIL. Of. Hay.";
var needle = "bail.";
var needleRegExp = new RegExp(needle.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"), "i");
var result = needleRegExp.test(haystack);
if (result) {
    // Your code here
}