compare string javascript ignorecase code example

Example 1: compare string camelcase and lowercase javascript

str.toUpperCase() === str || str.toLowerCase() === str;

Example 2: how to compare strings in javascript ignoring case sensitive

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

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