HTML DOM input number 对象

输入数字对象

输入数字对象表示 type="number" 的 HTML <input> 元素。

您可以使用 getElementById() 访问 type="number" 的 <input> 元素：

var x = document.getElementById("myNumber");

提示：您还可以通过搜索来访问 <input type="number">元素表格的集合。

您可以使用 document.createElement() 方法创建 type="number" 的 <input> 元素：

var x = document.createElement("INPUT");
x.setAttribute("type", "number");

Property	Description
autocomplete	Sets or returns the value of the autocomplete attribute of a number field
autofocus	Sets or returns whether a number field should automatically get focus when the page loads
defaultValue	Sets or returns the default value of a number field
disabled	Sets or returns whether a number field is disabled, or not
form	Returns a reference to the form that contains the number field
list	Returns a reference to the datalist that contains the number field
max	Sets or returns the value of the max attribute of a number field
min	Sets or returns the value of the min attribute of a number field
name	Sets or returns the value of the name attribute of a number field
placeholder	Sets or returns the value of the placeholder attribute of a number field
readOnly	Sets or returns whether the number field is read-only, or not
required	Sets or returns whether the number field must be filled out before submitting a form
step	Sets or returns the value of the step attribute of a number field
type	Returns which type of form element the number field is
value	Sets or returns the value of the value attribute of a number field

Method	Description
select()	Selects the content of a number text field
stepDown()	Decrements the value of the input number by a specified number
stepUp()	Increments the value of the input number by a specified number

输入数字对象还支持标准特性和事件。