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This article mainly shows you "how to use this in the js function", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use this in the js function" this article.

1. This points to the execution environment object of the function. When the function is called in the overall scope of the web page, the this object refers to window.

2. This points to the execution environment object of the function, and saycolor executes in the global scope.

Example

Window.color = "red"; var o = {color: "blue"}; function sayColor () {var color = "123"; alert (this.color);} sayColor (); / /" red "o.sayColor = sayColor;o.sayColor (); / /" blue "above is all the content of the article" how to use this in js function ". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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