javascript string compare case insensitive 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

function sameCase(str) {
  return /^[A-Z]+$/.test(str) || /^[a-z]+$/.test(str);
}