HTML learning (2018.1.18) and html learning 2018.1.18

HTML learning (2018.1.18) and html learning 2018.1.18

1,Escape characters

Escape Character: Used to indicate special characters in a webpage

XHTML does not directly enter symbols. We recommend that you use escape characters.

& Nbsp ------ space;

& Copy ------ copyright;

& Reg -------- Registered Trademark

If you enter consecutive spaces, use the & Escape Character & (& amp;) nbsp, that is, & amp; nbsp;

 

2,Horizontal line

<Hr> horizontal line

<Hr width = "500px" align = "left" color = "red" size = "1">

 

Width: Length

Align: Align

Color: Color

Size: width

 

3,Upper/lower mark

<Sub> subscript </sub>

<Sup> superscript </sub>

X1 = y2

<P> x ₁ = y ₂ </p> <br/>

X1 + y2 = y2

<P> x ¹ + y ² = y ₂ </p>

 

4,Title

Title from 1 to 6, h1-h6;

<H1> teaching time H1

<H2> teaching time H2

<H3> teaching time H3

<H4> teaching time H4

<H5> teaching time H5

<H6> teaching time H6

 

5,Pre-formatted text

Pre-formatted text: <pre> controls spaces and empty rows </pre>

<P> lalala </p>

<Pre> <p> lalalla </p> </pre>

 

6,Single tag

A non-closed type tag is also called an empty tag or a single tag <tag/> or <tag>. There is no difference between HTML4 and html5. however, all single tags must be closed in XHTML.

 

7,Important ideas

The HTML structure is separated from the style, and all relevant styles are written in css.