Use reportError to report errors to global error event handlers.
Topic: JavaScript – Page 7
Use capture groups in regular expressions to preserve the separators in the result of String.prototype.split().
The multiline mode in JavaScript expressions changes the behavior of ^ and $ to match patterns across multiple lines.
Numeric Separators in JavaScript are cross-browser-supported.
The new
showPicker()DOM methods enables developers to open a native date picker if the input element supports it.