is double equal case sensitive in javascript code example

Example 1: equalsignorecase typescript

const str1 = '[email protected]';
const str2 = '[email protected]';

str1 === str2; // false
str1.toLowerCase() === str2.toLowerCase(); // true

Example 2: 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
}