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Object.prototype.toString

Method returns a string that represents the object

You can get the type of each object through toString (). In order for each object to be detected by Object.prototype.toString (), it needs to be called in the form of Function.prototype.call () or Function.prototype.apply (), passing the object to be checked as the first parameter, called thisArg

Var toString = Object.prototype.toString;toString.call (new Date); / / [object Date] toString.call (new String); / / [object String] toString.call (Math); / / [object Math] toString.call (/ s /); / / [object RegExp] toString.call ([]); / / [object Array] / / Since JavaScript 1.8.5toString.call (undefined); / / [object Undefined] toString.call (null) / / [object Null] Thank you for reading! This is the end of this article on "how js uses Object.prototype.toString". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

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