常會有找出陣列中是否包含某元素的需求，過去會使用Array.prototype.indexOf() 來處理，但在ES2016 (ES7) 提供了Array.prototype.includes() 新 ... ... <看更多>

The top answers assume primitive types but if you want to find out if an array contains an object with some trait, Array.prototype.some() is an elegant ... ... <看更多>

The includes() method returns true if an array contains a given element; Otherwise, it returns false . The following illustrates the syntax of the includes() ... ... <看更多>

Through the use of the . includes () method in Javascript, you can test whether or not a value exists in an array. ... <看更多>

GitHub - kevlatus/polyfill-array-includes: This is a polyfill for the ... In Browser: <script src="/node_modules/polyfill-array-includes/index.js"></script> ... ... <看更多>