这个方法为什么会报错js for of

Question

这个方法问什么会报错function fab(max) {    var count = 0, last = 0, current = 1;    while(count++ < max) {        yield current;        var tmp = current;        current += last;        last = tmp;    }}for(var i of fab(10)) {    console.log(i);}

Answer 1

yield的使用场景应该和generator函数一起使用

function* fab(max) {

    var count = 0, last = 0, current = 1;

    while(count++ < max) {

        yield current;

        var tmp = current;

        current += last;

        last = tmp;

    }

}

for(var i of fab(10)) {

    console.log(i);

}