Write 3 ways to make case insensitive string comparison in javascript

example 1

let str1 = "Hello";
let str2 = "hello";

if (str1.toLowerCase() === str2.toLowerCase()) {
    console.log("Strings are equal");
} else {
    console.log("Strings are not equal");
}

2. Using localeCompare() method:

The localeCompare() method compares two strings in the current locale, and it can be made case-insensitive by passing the appropriate options.

let str1 = "Hello";

let str2 = "hello";

if (str1.localeCompare(str2, undefined, { sensitivity: 'base' }) === 0) {

    console.log("Strings are equal");

} else {

    console.log("Strings are not equal");

}

and

3. Using a regular expression:

Convert both strings to lowercase using a regular expression and then compare them.

let str1 = "Hello";

let str2 = "hello";

if (str1.match(new RegExp(str2, 'i'))) {

    console.log("Strings are equal");

} else {

    console.log("Strings are not equal");

}