Symbol - JavaScript | MDN

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015. * Some parts of this feature may have varying levels of support. Learn moreSee full compatibilityReport feedback Symbol is a built-in object whose constructor returns a symbol primitive — also called a Symbol value or just a Symbol — that's guaranteed to be

[mooz]

記号マスターへの道.