Object.keys(Array.apply(null, {length:100})).map(item=>+item);// 0-> 99 // 4 [...Array(100).keys()]// 0-> 99 [...Array.from({length:100}).keys()]// 0-> 99 // mdn 看见的 序列生成器(指定范围) const range = (start, stop, step) => Array.from({ length: (stop -...