Javascript Execution Context

Source: Internet
Author: User

Whenever a function is executed in JS, the execution context is created.

The life cycle of the execution context can be divided into two phases,

First stage: Create. Variable Object vo,this, the scope chain is determined at this stage.

Phase II: Execution. assignments, function references, and so on will be performed at this stage.

When execution is complete, the execution context is out of the stack.

Variable Object VO:

1. Establish arguments

2. function declaration Promotion

3. Variable declaration promotion.

Javascript Execution Context

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