What are the new features of html5 forms?

The new features of html5 forms are: 1. New input type values (email, url, number, tel, color, date, etc.); 2. New form element attributes (placeholder, autofocus, form, min , max, pattern, etc.).

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

H5’s new form features can be divided into two categories.

1. Type values of 10 inputs

1. email: email input field, provides simple email format verification when the form is submitted, and pops up a prompt window .

2. url: Address input field, which provides simple URL address format verification and pops up a prompt window when the form is submitted.

3. number: number input field. (min, max, step can be set)

4. tel: phone number input field, the number input field pops up in the mobile browser.

5. search: Search input field, a search button appears in the lower right corner of the mobile browser.

6. Range: range selection control.

7. color: color selection control.

8. date/month/week: time selection control.

2. 11 new attributes of form elements

1. autocomplete: automatic completion, whether to automatically record previously submitted data for the next input suggestion.

2. Placeholder: Placeholder, used to display prompt text in the input box. Unlike value, it cannot be submitted.

3. autofocus: automatically obtain input focus.

4. Multiple: Whether to allow multiple input values. If this attribute is declared, multiple values separated by commas are allowed to be entered in the input box.

5. form: The value is the id of a form. If set, the input field can be placed outside the form.

6. required: When the form is submitted, it will be verified whether there is input. If not, a prompt message will pop up.

7. maxlength: Limit the maximum length. It is only useful when there is input. It does not distinguish between Chinese and English.

7.5. minlength: limits the minimum length, but it is not an H5 standard attribute and is only supported by some browsers.

8. min: Limit the minimum value of the input number.

9. max: Limit the maximum value of the input number.

10. step: Limit the step size of the input number, used in conjunction with min.

11. pattern: Specify a regular expression to verify the input. (Regular defaults to add ^$ at the beginning and end)

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