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Analysis of pattern attribute of input box in html
- 黄舟Original
- 2017-10-27 09:57:594703browse
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 d5fd7aea971a85678ba271703566ebfd types: text, search, url, telephone, email and password.
Tip: Please use the standard "title" attribute to describe the schema.
Grammar:
<input pattern="regexp">
Example:
<!DOCTYPE HTML> <html> <body> <form action="/example/html5/demo_form.asp" method="get">
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>
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