Run results for: match vs test vs split vs trim to check for empty string or all spaces

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

window.strs = [['    ', true], ['', true], ['asdf', false], ['                 ', true]]

Tests:

match
window.strs.forEach(([str, expected]) => { (str.match(/^ *$/) !== null) === expected; });
test
window.strs.forEach(([str, expected]) => { /^ *$/.test(str) === expected; });
split
window.strs.forEach(([str, expected]) => { (str.split(/^ *$/).length === 2) === expected; });
trim
window.strs.forEach(([str, expected]) => { (str.trim().length === 0) === expected; });