Introduction to frame design

Selector Engine-1-Traditional method of obtaining elements

Selector Engine-2-Functionalization

selector engine-3-optimize each-1

selector engine-4-optimize each-2

Use optimized get and each to set styles

Add container parameters to the get method

Design the get method to achieve the acquisition of basic selector elements

Detection of byclassName method and efficiency upgrade

Implement a complete capability testing method

Implementation of getClass method

Handle push compatibility in IE

Extension - Ideas for optimizing push

Integrate js functions

Implement the search for elements under a certain DOM object

Assume the context is a dom array

Handle the case where the context parameter is a string

Analyze compound selector structure

Implement a combined selector

Handling descendant element selectors - ideas

Handling descendant element selectors - implementation and verification

Summary of ideas-pseudocode and simplified writing methods