javascript 在 JQUERY 中点击事件后获取返回结果
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get returned result after click event in JQUERY
提问by John Doe
I have a function that return value and i executed the function after click event for example
我有一个返回值的函数，例如我在单击事件后执行了该函数
$("some_div").click( my_function());
The answer is how to get the returned value of the function.
答案是如何获取函数的返回值。
i couldn't use
我不能用
var something = $("some_div").click( my_function());
Thanks to every one who contribute the the question.I've got my answer.
感谢每一位提出问题的人。我已经得到了答案。
回答by Felix Kling
You have to pass a functionto click, not its return value. In the event handler you can call your function and deal with the return value as you see fit:
您必须将函数传递给click，而不是其返回值。在事件处理程序中，您可以调用您的函数并按照您认为合适的方式处理返回值：
$("some_div").click(function() {
var result = my_function();
// do whatever you want with `result`
});
The event handler is not called immediately, but some time later (when the element is clicked). Therefore it does not make sense for .clickto return a value.
事件处理程序不会立即调用，而是在一段时间后（单击元素时）调用。因此.click返回一个值是没有意义的。
回答by Florian Rachor
You could declare a global Variable and write the result into that. Here is an example that writes the current event into global:
您可以声明一个全局变量并将结果写入其中。这是一个将当前事件写入全局的示例：
var global = ''
$("#some_div").click(function(e){
global = e;
});
回答by gdoron is supporting Monica
You can't get a return value, You only subsrcibe a callbackfunction that will be fire when clicking "some_div".
您无法获得返回值，您只能订阅一个callback在单击“some_div”时会触发的函数。
If you want to use some value from callbackfunction, use it inside the function or save it in a hidden input
如果要使用callback函数中的某个值，请在函数内部使用它或将其保存在hidden input
$("some_div").click(function() {
var someValue = foo();
$('#hiddenInputName').val(someValue);
});
//later on...
var extractedValue = $('#hiddenInputName').val();
