includes()函數用來判斷一個數組是否包含一個指定的值,包含則返回true,否則false
let arr= ['1','2','3'];
console.log(arr.includes('1'));
includes()函數用來判斷一個數組是否包含一個指定的值,包含則返回true,否則false
let arr= ['1','2','3'];
console.log(arr.includes('1'));
(function(d, s, id) { let js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) retur
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