Check for spam
importance: 5
Write a function checkSpam(str) that returns true if str contains ‘viagra’ or ‘XXX’, otherwise false.
The function must be case-insensitive:
checkSpam('buy ViAgRA now') == true
checkSpam('free xxxxx') == true
checkSpam("innocent rabbit") == falseTo make the search case-insensitive, let’s bring the string to lower case and then search:
function checkSpam(str) {
let lowerStr = str.toLowerCase();
return lowerStr.includes('viagra') || lowerStr.includes('xxx');
}
alert( checkSpam('buy ViAgRA now') );
alert( checkSpam('free xxxxx') );
alert( checkSpam("innocent rabbit") );