Let me summarize what I learned today. Although I have learned it before, I still feel that there is still something to learn.
Web front-end?Html:
HyperText Markup Language (HyperText Markup Language)
1. Overall skeleton
<!DOCTYPE html><html><head><meta charset="UTF-8" /><title></title></head><body></body></html>
This way the overall skeleton is there. We need to modify and modify
Tags in Html appear in pairs, and there are also self-ending tags, such as
, tags. Speaking of self-ending tags, we should mention html here. Standard, in fact, self-ending tags can be written like
, Even many editors now automatically complete tags like this. In fact, this loose specification was stipulated as early as Html 4.0. Later, XML appeared. This language has strict syntax. The end tag must be written like this . Html also wants to change it. It has such a syntax, but it is difficult to stop it. There are already many web pages using Html4.0, so we see that there is such a thing as xhtml, which is actually a transition from Html to xml.
Notes:
Common tags:
Title tags: h1~h6
Paragraph tags:
Line break tags:
Unordered list:
Image:
Inline Frame:
Hyperlink:
Table tag:
<table border="1px"> <thead> </thead> <tbody> <tr> <td></td> </tr> </tbody> <tfoot> </tfoot><table>
Form tag:
<form action=""> <input type="text" name="username" /> <input type="password" name="pwd" /> <input type="raido" name="sex" value="men"/> <input type="raido" name="sex" value="women"/> <input type="checkbox" name="sport" value="football"> <input type="checkbox" name="sport" value="basketball"> <input type="submit" value="submit"> <select name="city"> <option value="beijing"></option> <option value="shanghai"></option> </select></form>
Web front-end?Css:
Cascading Style Sheets
If Html is the skeleton of the human body, then Css is used to enrich this skeleton
Css code location:
1. The style attribute in the tag
2. In the style In the tag
3. Introduce external style sheet*
Syntax:
Selector {
Attribute: value;
Attribute: value;
}
Four selectors:
1. Element selector: p, div
2. ID selector: #id
3. Class selector: .class
4. Combination selector: #id,.class
Box model:
Margin: margin
Border: border
Padding: padding
Width: height
Height: width
Note: Width and height include borders and padding. Pay attention when using it
Margins, borders, and padding can be set in four directions
flaot Float
Color: #Hexadecimal number composed of rgb three primary colors
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Explain the importance of using consistent coding style for HTML tags and attributes.May 01, 2025 am 12:01 AMA consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.
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