This is a playground to test JavaScript. It runs a completely standard copy of Node.js on a virtual server created just for you. Every one of npm’s 300,000+ packages are pre-installed, so try it out:
const XRegExp = require('xregexp');
const regex = XRegExp.tag('x')`
# Flag x (extended) enables free-spacing and comments
# XRegExp.tag uses raw strings so backslashes don't need to be escaped
^
(?<year> \d{4} ) [-.]
(?<month> \d{2} ) [-.]
(?<day> \d{2} ) # no separator at end
$
`;
XRegExp.replace('2024-04-27', regex, 'lt;month>/lt;day>/lt;year>');
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