Javascript HTMLInputElement 没有方法“val”
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3332698/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
HTMLInputElement has no method 'val'
提问by The.Anti.9
I'm looping through cells in a table row. each cell has a text box in it, and I want to take the value of the text box and push it onto an array.
我正在遍历表格行中的单元格。每个单元格中都有一个文本框，我想获取文本框的值并将其推送到数组中。
function dothing() {
var tds = $('#'+selected+' td');
var submitvals = new Array();
tds.each(function(i) {
var val = $(this).children('input')[0].val();
submitvals.push(val);
});
}
Theres more to the function, but this is all that is relevant. For some reason, when I run this code, I get "HTMLInputElement has no method 'val'." I thought that input elements were supposed to have a val()method in jQuery that got the value so this makes no sense. Am I missing something, or doing it wrong?
该功能还有更多内容，但这就是相关的全部内容。出于某种原因，当我运行此代码时，我得到“HTMLInputElement has no method 'val'”。我认为输入元素应该val()在 jQuery 中有一个方法来获取值，所以这是没有意义的。我错过了什么，还是做错了？
回答by meder omuraliev
val()is a jQuery method. .valueis the DOM Element's property. Use [0].valueor .eq(0).val()....
val()是一个 jQuery 方法。.value是 DOM 元素的属性。使用[0].value或.eq(0).val()....
回答by Alex
.val()is a jQuery function, not a javascript function. Therefore, change:
.val()是一个 jQuery 函数，而不是一个 javascript 函数。因此，更改：
var val = $(this).children('input')[0].val()
To:
到：
var val = $(this).children('input:eq(0)').val()
回答by edtsech
function dothing() {
var tds = $('#'+selected+' td');
var submitvals = new Array();
tds.each(function(i) {
var val = $($(this).children('input')[0]).val();
submitvals.push(val);
});
}
回答by Ben Rowe
.val() is a jquery method. Using [0] returns the DOM element, not the jquery element
.val() 是一种 jquery 方法。使用 [0] 返回 DOM 元素，而不是 jquery 元素
var val = $(this).children('input:first').val();
回答by Dronz
What I don't understand, is why none of the suggested syntaxes on this or other questions similar to this seem to work for me. I had to do trial and error and eventually had to use:
我不明白的是，为什么关于这个或其他类似问题的建议语法似乎对我不起作用。我不得不反复试验，最终不得不使用：
MySelectElement.value = x;
MySelectElement.value = x;
It also didn't help that the Visual Studio Intellisense suggestions offer a whole other range of unworking method names, such as ValueOf().
Visual Studio Intellisense 建议提供了一系列其他无效的方法名称，例如 ValueOf()，这也无济于事。
