Using Python to manipulate web front-end Fundamentals 2

First, page layout:

1. Main Station layout

2. Background Management layout:

Position property: 1. Fixed: Always in one place

2. Relative: no meaning alone

3. Absolute: The first position, at the specified position, when the scroll wheel, not in the specified position.

Second, JavaScript functions:

1. Normal function: function () {Functional content}

2. Anonymous functions

3. Self-executing functions

Third, JavaScript serialization and Escape:

1. Convert a list to a string: Json.stringify (LI)

2. Convert the string to a list: Json. Parse (str)

3. Encode (URL) escape

4. Decode (URL)

5. Escape () escapes the string

6. Unescape () to decode the escaped character code

Iv. Eval

1. Python: eval (expression) turns the string into a transport process; exec (execution code)

2. javascript: eval combines the two functions of python above.

Five, Time:

Date Object

Getminutes Get minutes

setminutes Setting minutes

Vi. Scope

1. Other languages, using code blocks as scopes, can be used only within this section of code

2. JavaScript: The function is scoped, the scope of the function has been created before the function call, the scope of the function has a scope chain, and has been created before the function call.

3. Local variables inside the JavaScript function have a pre-declared effect.

Seven, Dom: document Operation model;

1. Find: Direct lookup: document.getElementById ()

Indirect lookup: Innertext get text; InnerHTML get links; value; Gets the text of input; Select gets the value of the selected values; textarea gets the text content;

Class operation: Classname;classlist.add;classlist.remove;

Property operation: Attributes;setattribute (Key,value); GetAttribute (key);

Other operations:console.log输出框；alert弹出框；confirm确认框；

 　　　　  URL和刷新:  location.href获取URL; location.href =  "url" 重定向;  location.reload()重新加载;   定时器:  setInterval多次定时器; clearInterval;清除多次定时器;  setTimeout单次定时器; clearTimeout清除单次定时器;Viii. events: Two methods of binding events: 1. Direct tag Binding onclick= "xxxx ()"; 2 Gets the DOM object and then binds: document.getElementById ("xx"). onclick;

　　　　　　

　　

Using Python to manipulate web front-end Fundamentals 2