1-1 First experience with JavaScript: What can js do? What can't be done?

1-2 JavaScript statements and comments: Where are statements written? How many types of comments are there?

1-3 Identifier/literal/variable naming convention: Give your buddy a nice name

1-4 Data types in JavaScript: Operations can only be performed if the type is determined

1-5 How to convert other types to data type: a very practical function

1-6 JavaScript operators: Give you a handy weapon

2-1 Character methods in JavaScript: you’ve been using them before you know it

2-2 Array methods in JavaScript: suffocatingly powerful

3-1 JavaScript functions and function expressions: repeatable code

3-2 Variable scope: The first level of the official university can crush people to death

3-3 A little secret about JavaScript objects: I just took a peek and said nothing

3-4 Creation and viewing of objects: the three most common methods of panoramic presentation

4-1 Conditional judgment: there is always some code that exists but does not need to be executed

4-2 switch structure: a powerful tool for multi-branch judgment

4-3 while and do~while loops: repeated execution is the computer’s strength

4-4 for loop: be a simple and elegant handsome man

4-5 for-in loop: a tool for traversing objects and arrays

5-1 DOM tree: an important basis for important elements in js operations

5-2 onload and onclick events: warm up first

5-3 You have to find me first: Four common ways to select page elements

5-4 Common attributes of nodes: type, name and value

5-5 The relationship between nodes: father, son, brother, elder and younger are in order

5-6 Add, delete, modify and check attribute nodes: the most effective way to control elements

5-7 Child node type judgment and operation: not all nodes are what I love

5-8 Add, delete, modify and query element nodes: treat DOM as a database to operate

6-1 A quick introduction to events: Understand its past and present life in 2 minutes

6-2 Three ways to bind events to objects: Events exist as properties and methods of the object

6-3 Event bubbling and interception: bottom-up automatic triggering of parent similar events