First experience with JavaScript: What can js do? What can't be done?

JavaScript statements and comments: Where are statements written? How many types of comments are there?

Identifier/literal/variable naming convention: Give your buddy a nice name

Data types in JavaScript: Operations can only be performed if the type is determined

How to convert other types to data type: a very practical function

JavaScript operators: Give you a handy weapon

Character methods in JavaScript: you’ve been using them before you know it

Array methods in JavaScript: suffocatingly powerful

JavaScript functions and function expressions: repeatable code

Variable scope: The first level of the official university can crush people to death

A little secret about JavaScript objects: I just took a peek and said nothing

Creation and viewing of objects: the three most common methods of panoramic presentation

Conditional judgment: there is always some code that exists but does not need to be executed

switch structure: a powerful tool for multi-branch judgment

while and do~while loops: repeated execution is the computer’s strength

for loop: be a simple and elegant handsome man

for-in loop: a tool for traversing objects and arrays

DOM tree: an important basis for important elements in js operations

onload and onclick events: warm up first

You have to find me first: Four common ways to select page elements

Common attributes of nodes: type, name and value

The relationship between nodes: father, son, brother, elder and younger are in order

Add, delete, modify and check attribute nodes: the most effective way to control elements

Child node type judgment and operation: not all nodes are what I love

Add, delete, modify and query element nodes: treat DOM as a database to operate

A quick introduction to events: Understand its past and present life in 2 minutes

Three ways to bind events to objects: Events exist as properties and methods of the object

Event bubbling and interception: bottom-up automatic triggering of parent similar events