Several problems to be solved in javascript Learning

When learning javascript, we need to take a closer look at the following questions:

1. javascript callback function

2. Cross-Site Request for Cross Domain

3. Class

4. Design Mode

5. namespace

6. Various browser standards

7. Algorithms

8. code optimization

The above takes time to solve, and the following common javascript functions need to be summarized.

1. Operation effects (including image switching and Tab switching)

2. asynchronous transmission and loading of data (asynchronous loading of user information, etc)

3. Client data verification

4. Client Data Processing (JSON, DOM, etc)

These functions are very common functions that need to be sorted and optimized.