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Core JavaScript Keyword Quiz
JavaScript
25:00
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1 pts
javascript
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Write a JavaScript function that checks if a given string is a palindrome, ignoring case, spaces, and punctuation.
return str.replace(/[^a-zA-Z0-9]/g, '').toLowerCase() === str.replace(/[^a-zA-Z0-9]/g, '').toLowerCase().split('').reverse().join('');
return str === str.split('').reverse().join('');
return str.toLowerCase() === str.split('').reverse().join('');
return str.replace(/[^a-zA-Z0-9]/g, '').toLowerCase().split('').reverse().join('') === str.replace(/[^a-zA-Z0-9]/g, '').toLowerCase();