Analysis of pattern attribute of input box in html

黄舟

Release： 2017-10-27 09:57:59

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Definition and Usage

pattern AttributeSpecifies the pattern used to validate the input field.

Pattern refers to regular expression. You can read about this in our JavaScript tutorial.

Note: The pattern attribute applies to the following types: text, search, url, telephone, email and password.

Tip: Please use the standard "title" attribute to describe the schema.

Grammar:

<input pattern="regexp">

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Example:

<!DOCTYPE HTML>
<html>
<body>
<form action="/example/html5/demo_form.asp" method="get">

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Country code:

<input type="text" name="country_code" pattern="[A-z]{3}"
title="三个字母的国家代码" />
<input type="submit" />
</form>
</body>
</html>

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