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This article mainly introduces the relevant knowledge of what the variable object is in js, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value, I believe you will gain something after reading this js variable object article, let's take a look at it.

1. The variable object is the data scope related to the execution context. It is a special context-sensitive object that stores variables and function declarations defined in the context.

2. Variable object is an abstract concept. Different context types physically use different objects.

Example

Var foo = 10; function bar () {} / / function declaration, FD (function baz () {}); / / function expression, FE console.log (this.foo = = foo, / / true window.bar = = bar / / true); console.log (baz); / / ReferenceError, "baz" is not defined on "what is the variable object in js" this article is introduced here, thank you for reading! I believe that everyone has a certain understanding of the knowledge of "what is the variable object in js". If you want to learn more knowledge, you are welcome to follow the industry information channel.

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