val() 如何返回数字?
在val
docs中写了这样的描述:
.val() 返回:字符串、数字、数组
.val() Returns: String, Number, Array
我试图获取一个 Number
,但它似乎只返回 string
,是不是我做错了什么?
I tried to get a Number
, but it seems to return string
only, Is there something that I'm doing wrong?
$('#gdoron').val('1');
alert($('#gdoron').val() === '1'); // true
alert(typeof $('#gdoron').val()); // string.
$('#gdoron').val(1);
alert($('#gdoron').val() === 1); // false
alert(typeof $('#gdoron').val()); // string (not "number"!)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="gdoron" />
我的问题是:val()
如何按照文档所述返回数字? 问题不在于如何解析字符串.
My question is: how can val()
return number as the docs says? The question is not about how can I parse the string.
推荐答案
一些 HTML5 元素,例如进展;
Some HTML5 elements e.g. progress;
console.log(typeof $("#prog").val()); // number
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<progress value="50" max="100" id="prog"></progress>
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