A brief discussion on the improvement of variable and function declarations in JavaScript

Phenomena:

1. In JavaScript, the declaration of variables and functions will be promoted to the top for execution.

2. The promotion of functions is higher than the promotion of variables.

3. If an external variable with the same name is declared using var inside the function, the function will no longer search upwards.

4. Anonymous functions will not be promoted.

5. Functions in different

• An in-depth analysis of the Bootstrap list group component
• Detailed explanation of JavaScript function currying
• Complete example of JS password generation and strength detection (with demo source code download)
• Angularjs integrates WeChat UI (weui)
• How to quickly switch between Traditional Chinese and Simplified Chinese with JavaScript and the trick for websites to support switching between Simplified and Traditional Chinese_javascript skills