È possibile utilizzare l’elemento input con type=number per creare un campo destinato all’inserimento di un numero.. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. You can also set restrictions on what numbers are accepted. This seems a bit buggy in Chrome right now so it might not be the best solution at the moment. Number 对象是 HTML5 中的新对象。 Number 对象表示 HTML 元素。 注释： Internet Explorer 9 以及更早的版本不支持 元素。 访问 Number 对象. An HTML form with two input fields and one submit button:If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: While using this site, you agree to have read and accepted our Define a field for entering a number (You can also set restrictions on what numbers are accepted):The defines a field for entering a number.Use the following attributes to specify restrictions:If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: In Chrome & Firefox, the stepper buttons will increment / decrement by 1 when using any. The

tag is used to create an HTML form for user input. w3schools.com.

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Number 对象是 HTML5 中的新对象。 Number 对象表示 HTML 元素。 注释： Internet Explorer 9 以及更早的版本不支持 元素。 访问 Number 对象. HTML CSS JAVASCRIPT SQL PHP BOOTSTRAP HOW TO JQUERY W3.CSS ANGULARJS XML MORE FORUM EXAMPLES REFERENCES × × HTML HTML Tag Reference HTML Event Reference HTML Color Reference HTML Attribute Reference HTML Canvas Reference HTML SVG Reference Google Maps Reference Charsets HTML Character Sets HTML ASCII HTML ANSI HTML Windows-1252 HTML … when submitted.Some smartphones recognize the url type, and adds ".com" to the keyboard to match 参数 value 是要创建的 Number 对象的数值，或是要转换成数字的值。. 您可以通过使用 getElementById() 来访问 元素： input data.This is how the HTML code above will be displayed in a browser:If you omit the submit button's value attribute, the button will get a default text:This is how the HTML code above will be displayed in a browser:If you change the input values and then click the "Reset" button, the form-data will be reset to the default values.Radio buttons let a user select ONLY ONE of a limited number of choices:This is how the HTML code above will be displayed in a browser:Checkboxes let a user select ZERO or MORE options of a limited number of choices.This is how the HTML code above will be displayed in a browser:This is how the HTML code above will be displayed in a browser:Depending on browser support, a color picker can show up in the input field.Depending on browser support, a date picker can show up in the input field.Depending on browser support, a date picker can show up in the input field.Depending on browser support, the e-mail address can be automatically validated when submitted.Some smartphones recognize the email type, and add ".com" to the keyboard to match email input.Depending on browser support, a date picker can show up in the input field.You can also set restrictions on what numbers are accepted.The following example displays a numeric input field, where you can enter a value from 1 to 5:
share | improve this answer | follow | edited Jul 5 '17 at 18:17. THE WORLD'S LARGEST WEB DEVELOPER SITE . w3school 在线教程 . You will learn more about input restrictions in the next chapter. I dispositivi mobili e il type number. The defines a numeric input field. Examples might be simplified to improve reading and basic understanding. 当 Number() 和运算符 new 一起作为构造函数使用时，它返回一个新创建的 Number … HTML 5 type 属性 ... number 输入类型用于包含数字值的输入字段。 ... W3School 简体中文版提供的内容仅用于培训和测试，不保证内容的正确性。通过使用本站内容随之而来的风险与本站无关。版权所有，保留一切权利。 Quantity (between 1 and 5): html:not([dir="rtl"]) input { text-align: left; } This snippet searches the DOM for any input that is not set right-to-left and forces the text to the left. The form-handler is typically a server page with a script for processing form 属性规定 元素所属的一个或多个表单。 提示： 如需引用一个以上的表单，请使用空格分隔的表单 id 列表。 实例. Donald Byrd. The defines a field for entering a number. 类型：number, range, date, datetime, datetime-local, month, time 以及 week。 HTML 4.01 与 HTML 5 之间的差异. Use the following attributes to specify restrictions: max - specifies the maximum value allowed; min - specifies the minimum value allowed; step - specifies the legal number intervals; value - Specifies the default value; Tip: Always add the tag for best accessibility practices! HTML5 新的 Input 类型.