JavaScript 告诉你命中了哪个条件

2022-01-20 00:00:00 scope conditional javascript

如果我在 JavaScript 中有这样的语句:

If I have a statement in JavaScript like:

if(!me.a || !me.b || !me.c) {
     // I want to know which not was matched here
}

我如何知道在范围内匹配了哪个条件?有没有魔算子?

How do I know which conditional was matched inside the scope? Is there any magic operator?

推荐答案

嗯，一种方法是 && 每个条件的标识符并检查结果.

Well, one way is to && an identifier with each condition and check the result.

var result = (!me.a && 1) || (!me.b && 2) || (!me.c && 3);

if(result) {
    // if result is 1, then !me.a is true
    // if result is 2, then !me.b is true and !me.a is false
    // if result is 3, only !me.c is true
}

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