国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Dugu Jiujian (3)_JavaScript video tutorial

• Chapter1 Quick introduction to basic JavaScript syntax
• 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
• Chapter2 Common methods for JavaScript strings and arrays
• 2-1 Character methods in JavaScript: you’ve been using them before you know it
• 2-2 Array methods in JavaScript: suffocatingly powerful
• Chapter3 Functions and objects in JavaScript
• 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
• Chapter4 JavaScript execution flow control
• 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
• Chapter5 DOM manipulation in JavaScript
• 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
• Chapter6 Events in JavaScript
• 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