includes方法查找数组中是否存在某个元素,返回值:true / false
const arr = [1, 2, 3, 4, 5, '6'] const r = arr.includes(1) console.log(r) // true const rr = arr.includes(6) console.log(rr) //false
includes方法查找数组中是否存在某个元素,返回值:true / false
const arr = [1, 2, 3, 4, 5, '6'] const r = arr.includes(1) console.log(r) // true const rr = arr.includes(6) console.log(rr) //false
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