摘要：在js函数的参数里，可以传入一个函数作为参数 例子： var fn = (a)=>{ //如果这个参数a是函数，那么就执行这个函数，否则打印a的值 if(typeof a "function"){ a(); }else{ console.log(a) } } fn(test(2)) function
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posted @ 2019-12-15 02:08
12 2019 档案
摘要：let a = 'a' let b = true let c = NaN let d = null let e = undefined let f = {} let g = [] let h = {name:'zs'} let i = ['a'] let j = '1.03' let k = '1.
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posted @ 2019-12-01 18:13
摘要：let a = true let b = 2 let c = null let d = undefined let e = NaN let f = {} let g = [] toString() 吗？ 不行 // 1.toString() console.log(a.toString()); //
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posted @ 2019-12-01 17:24
