HTML form tag summary
最近研究 form标签,有一些小心得写下来与大家分享分享,共勉。在小结的最后有一个form表单的小例子,可以作为参考。 -----DanlV
form是HTML的一个极为重要的功能标签之一。
- input type The attributes have the following attribute values:
1.button button (more details below)
2.file is used for file selection
3.hidden hidden field, which can realize hidden operations
4.text Used for text input
5.password input with password
6.radio radio button, the same name attribute is a group
7.checkbox multi-select button, the name attribute is the same group
8.image image form submit button
9.reset reset form button
10.submit submit form button - alt attribute, defined when the button image , the alternative text of the slide
- src attribute, which defines the link address of the image when the button is an image
- checked attribute, which defines the default option
The value of checked is true or false, or it can be written directly as checked
- disabled attribute to disable the current Input field (usage as checked)
- readonly attribute, read-only for the current input field, the actual function is the same as disabled, but the displayed effect is different (usage as checked)
- maxlength attribute, defines the maximum length of input field characters
- name attribute, defines the name of the current input field
- value attribute, defines the default value of the current input field
Text input area textarea
- rows attribute, specifies visible rows Number
- cols attribute, specifies the number of visible columns
- name attribute, the name of the current text area
- readonly attribute, the current text area is read-only
- There are three type types:
- 1.type="button"General function button
2.type="submit"Submit form form Function button
3.type="reset"Reset form form function related function button disabled attribute, disable this button - name attribute, the name of the button
- value attribute, the default value of the text content displayed on the button
- Related attributes:
- 1.disabled attribute, disable the menu
2.multiple attribute, stipulates that multiple items can be selected at the same time
3.name attribute, drop-down The name of the list
4.size attribute, the number of visible items in the menu ##
In order to make the input more user-friendly and improve the user experience, When clicking on the prompt text, the cursor will automatically focus on the input position. Use this label. There are two ways to use it:
- This method uses the for attribute of label, and the value specifies the name of the input area
-
- Put the input directly into the label. There is no need to use the for attribute, which is recommended.
---
Group related elements in the form fieldset
To group related elements in the form, use
Label defines the group title. See the last code for relevant examples.
Code Example
The above is the detailed content of Summarize some uses of HTML form. For more information, please follow other related articles on the PHP Chinese website!

本篇文章带大家了解一下HTML(超文本标记语言),介绍一下HTML的本质,HTML文档的结构、HTML文档的基本标签和图像标签、列表、表格标签、媒体元素、表单,希望对大家有所帮助!

不算。html是一种用来告知浏览器如何组织页面的标记语言,而CSS是一种用来表现HTML或XML等文件样式的样式设计语言;html和css不具备很强的逻辑性和流程控制功能,缺乏灵活性,且html和css不能按照人类的设计对一件工作进行重复的循环,直至得到让人类满意的答案。

总结了一些web前端面试(笔试)题分享给大家,本篇文章就先给大家分享HTML部分的笔试题(附答案),大家可以自己做做,看看能答对几个!

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

在html中,document是文档对象的意思,代表浏览器窗口的文档;document对象是window对象的子对象,所以可通过“window.document”属性对其进行访问,每个载入浏览器的HTML文档都会成为Document对象。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

3种取消方法:1、给td元素添加“border:none”无边框样式即可,语法“td{border:none}”。2、给td元素添加“border:0”样式,语法“td{border:0;}”,将td边框的宽度设置为0即可。3、给td元素添加“border:transparent”样式,语法“td{border:transparent;}”,将td边框的颜色设置为透明即可。


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