html5 – 为什么类型为“number”的html输入允许在字段中输入字母“e”？

我有以下html5输入元素：

<input type="number">

为什么此输入允许在输入字段中输入字符“e”？不能输入其他字母字符(如预期)

使用chrome v。44.0.2403.107

看看我的意思：http://www.w3schools.com/html/tryit.asp?filename=tryhtml_input_number

解决方法

因为这正是070​​00说它应该工作。数字输入可以接受 floating point numbers，包括负号和e或E字符：

A floating-point number consists of the following parts,in exactly
the following order:

1. Optionally,the first character may be a “-” character.
2. One or more characters in the range “0—9“.
3. Optionally,the following parts,in exactly the following order:
   1. a “.” character
   2. one or more characters in the range “0—9“
4. Optionally,in exactly the following order:
   1. a “e” character or “E” character
   2. optionally,a “-” character or “+” character
   3. One or more characters in the range “0—9“.