javascript - 带逗号的jquery输入数字

Question

我在 jquery 中有一个奇怪的行为。

我想获取输入字段的值(类型数字)。通过示例更容易展示。

当值包含逗号时，该函数会返回一个空字符串。

$("#input[type='number']").on('change',function() {
            alert($(this).val());
        });

为什么？

提前致谢

Answer 1

HTML5 的 spec不允许逗号:

value = floating-point number
   A string representing a number

floating-point numbe r:

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"
    Optionally, the following parts, 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".