Detailed introduction to HTML forms

HTML forms are used to collect different types of user input. HTML5 Input, with multiple new form input types, provides better input control and validation.

Form

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A form is an area that contains form elements.

Form elements are elements that allow users to enter information in a form (such as text fields, drop-down lists, radio buttons, check boxes, etc.).

Forms are defined using the form tag (

).

##Input type

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HTML5 has several new form input types. These new features provide better input control and validation.

1.Input type - email

email type is used for input fields that should contain e-mail addresses. When submitting the form, the value of the

email field will automatically be verified.

2.Input type - url

The url type is used for input fields that should contain URL addresses. When submitting the form, the value of the url field is automatically verified.

3.Input type - number

number type is used for input fields that should contain numerical values. You can also set limits on the numbers that are accepted:

4.Input type - range

range type is used when a certain Input field for numeric values ​​within the range.

Range types are displayed as sliders.

You can also set limits on the numbers accepted:

5.Input Type - Date Pickers (Data Checker)

HTML5 has several new input types for selecting dates and times:

date - selects day, month, year

month - selects month, year

week - Select week and year

time - Select time (hours and minutes)

datetime - Select time, day, month, year (UTC time)

datetime-local - Select time, day, month, year (local time)

6.Input type - search

search type is used

Search domains, such as site search or Google search.

The search field appears as a regular text field.

Input

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The form tag used in most cases is the input tag (). The input type is defined by the type

attribute (type). Most commonly used input types are as follows:

Text field

Text is used when users type letters, numbers, etc. in a form fields (text fields).

<form>
First name: <input type="text" name="firstname" /><br />
Last name: <input type="text" name="lastname" />
</form>

The browser displays as follows:

#Note that the form itself is not visible. Also, in most browsers, the default width of a text field is 20 characters.

Radio buttons are used when the user selects one of several given choices.

<form>
<input type="radio" name="sex" value="male"> Male
<input type="radio" name="sex" value="female"> Female
</form>

The browser displays the following:

Male
Female

Note that you can only select one of them.

As shown:

Check box

When the user needs to select from a number of given choices When selecting one or several options, checkboxes are used.

<form>
<input type="checkbox" name="bike" />I have a bike
<br />
<input type="checkbox" name="car" />I have a car
</form>

The browser displays as follows:

I have a bike
I have a car

Other components

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Confirm

Button

When the user clicks the confirm button (submit), the content of the form will be transferred to another file. [1]

Action attribute

The action attribute (

action) of the form defines the file name of the destination file. The file defined by the action attribute usually performs related processing on the input data received.

<form name="input" action="html_form_action.asp" method="get">
Username: <input type="text" name="user">
<input type="submit" value="Submit">
</form>

The browser displays as follows:

Username:

As shown below:

If you are in the above text Type a few letters into the box and click the confirm button, then the input data will be sent to the page named "html_form_action.asp". That page will display the results entered.

Form Tag

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5. Detailed explanation of the parameters and attributes of the form form in HTML

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