Summarize the use of new form elements in HTML5 and practical tutorials

HTML5 New form elements

HTML5 has the following new form elements:

< output>

Note: Not all browsers support the new HTML5 form elements, but you can use them. Even if the browser does not support form attributes, it can still be displayed as a regular form element.

HTML5

Use the list attribute of the element to bind to the

Example

<input> 元素使用<datalist>预定义值:
<input list="browsers"><datalist id="browsers">  <option value="Internet Explorer">  <option value="Firefox">  <option value="Chrome">  <option value="Opera">  <option value="Safari"></datalist>

HTML5 Element

The role of the element is to provide a reliable method to authenticate the user. The

tag specifies the key pair generator field used for the form.

When the form is submitted, two keys will be generated, one is the private key and the other is the public key.

The private key is stored on the client, and the public key is sent to the server. The public key can be used later to verify the user's client certificate (client certificate).

Example

Form with keygen field:

<form action="demo_keygen.asp" method="get">用户名: <input type="text" name="usr_name">加密: <keygen name="security"><input type="submit"></form>

HTML5

element

element is used for different types of output , such as calculation or script output:

Example

Display the calculation results in the

element:

<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0<input type="range" id="a" value="50">100 +<input type="number" id="b" value="50">=<output name="x" for="a b"></output></form>

HTML5 new form element

< datalist>: The tag defines a list of options. Use this element in conjunction with an input element to define the possible values ​​of the input. ​

: The tag specifies the key pair generator field used for the form.

: The

tag defines different types of output, such as the output of a script.

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