HTML5 Form Validation With the “pattern” Attribute

定义和用法. pattern 属性规定用于验证<input> 元素的值的正则表达式。 注意：pattern 属性适用于下面的input 类型：text、search、url、tel、email 和password。 提示：请 ...

The pattern attribute specifies a regular expression that the <input> element's value is checked against on form submission. Note: The pattern attribute works ...

The pattern attribute, when specified, is a regular expression which the input's value must match for the value to pass constraint validation. Try it · Overview · Examples

若要更進一步規範input 的內容，就加上pattern 屬性。只有在type 為text, search, tel, url, email, password 時的input 生效。 而pattern 屬性需 ...

I want to validate input text field only accept AZ az 0-9 and space within word. And at least one char or number. For example, abc def , abc092, abcdef ...

I need to get a pattern that accepts exactly 12 characters containing upper case letters and numbers. Nothing more nor less than 12 characters.

定义和用法. pattern 属性规定正则表达式，在提交表单时根据该正则表达式检查<input> 元素的值。 注意： pattern 属性适用于以下输入类型：.

This tutorial explains how you can add regular expression pattern matching into your HTML to help with form validation.

公司統編. 1, <input type=text pattern=-d{8}> · 至少8位英數的密碼限制. 1, <input type=password pattern=[a-zA-Z0-9]{8,}> · 台灣手機號碼( - ...