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instanceof的实现原理

2022-04-23 06:26:00 【笔描相思】

function instanceOf(left, right) {
    let leftValue = left.__proto__;
    let rightValue = right.prototype;
    while (true) {
        if (leftValue === null) {
            return false;
        }
        if (leftValue === rightValue) {
          return true;
        }
    leftValue = leftValue.__proto__;
   }
}

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本文为[笔描相思]所创，转载请带上原文链接，感谢
https://blog.csdn.net/qq_44788119/article/details/120903070