js判断是否为数组

一时失言乱红尘 2023-03-14 10:48 4阅读 0赞

var array = [1, 2, 3];
    
    console.log(array instanceof Array); //父子页面数组赋值，可能无效
    console.log(array.constructor == Array); //父子页面数组赋值，可能无效
    console.log(array.__proto__.constructor == Array); //有兼容问题，早期 IE 浏览器 js 对象没有 __proto__ 定义
    console.log(Object.prototype.toString.call(array) == '[object Array]'); //通用解决办法
    
    console.log(typeof array); //可以用来判断基本类型，此处返回 object

控制台打印结果：

true
    true
    true
    true
    object

参考：

[https://www.cnblogs.com/ysk123/p/9995920.html][https_www.cnblogs.com_ysk123_p_9995920.html]

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[https_www.cnblogs.com_ysk123_p_9995920.html]: https://www.cnblogs.com/ysk123/p/9995920.html
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