Introduction

update time：2018-01-08

Web page production "The Difference Between H5 and Previous Versions of HTML"

one. Changes in syntax

1.1 Marking method in HTMl5

1. Content type

The file extension remains unchanged, it is still .htm or .htm, and the content type is "text/html"

2. DOCTYPE statement

<!DOCTYPE HTML>

3. Specify the encoding of characters

1.2 HTML ensures compatibility with previous HTML versions

three aspects:

1. Marked elements can be omitted

The elements that do not allow the use of closing tags are: area, base, br, col, command, embed, hr, img, input, keygen, link, meta, param, source, track, wbr.

The end tag elements that can be omitted are: li, dt, dd, p, rt, rp, optgroup, option, colgroup, thread, tbody, tfoot, tr, td, th.

All marked elements that can be omitted are: html, head, body, colgroup, tbody.

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