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In HTML5, you can use the type attribute of the input tag to realize the function of inputting only numbers. You only need to set the value of the type attribute to "number", the syntax is "".
The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.
tag specifies an input field into which the user can enter data.
According to different type attributes, input fields have various forms. Input fields can be text fields, checkboxes, password fields, radio buttons, buttons, etc.
If you want to set the input to only input numbers, you only need to set the value of the type attribute to "number":
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> </head> <body> <input placeholder="文本,字母,数字等都可输入"/><br /><br /> <input type="number" placeholder="只能输入数字"/> </body> </html>
Output result:
Supplement: The type of input element--the value that can be set by the type attribute
| Value | Description |
|---|---|
| #button | Define a clickable button (often used with JavaScript to launch a script). |
| checkbox | Define the checkbox. |
| color | Define the color picker. |
| date | Define date control (including year, month, day, excluding time). |
| datetime | Define date and time controls (including year, month, day, hour, minute, second, fraction of a second, based on UTC time zone). |
| datetime-local | Define date and time controls (including year, month, day, hour, minute, second, fraction of a second, without time zone) . |
| Defines the fields used for e-mail addresses. | |
| file | Define the file selection field and "Browse..." button for file upload. |
| hidden | Define hidden input fields. |
| image | Define the image as the submit button. |
| month | Define month and year controls (without time zone). |
| number | Defines the field for entering numbers. |
| password | Define the password field (characters in the field will be masked). |
| radio | Define radio buttons. |
| #range | Defines a control for entering numbers where the exact value is not important (such as a slider control). |
| reset | Define the reset button (reset all form values to default values). |
| search | Define the text field used to enter the search string. |
| submit | Define the submit button. |
| tel | Defines the field for entering a phone number. |
| text | Default. Defines a single-line text field (default width is 20 characters). |
| time | Defines a control for entering time (without time zone). |
| url | Defines the field for entering the URL. |
| week | Define week and year controls (without time zone). |
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