通过ID选择隐藏的表单元素

Question

I am trying to set a value to a hidden form element by selecting their Id and not their name attribute. The hidden element has id="user_lat and name="user_lat" . How can I do that?

I seem to be able to select by name:

$("input[name='user_lat']").val(results[0].geometry.location.lat());

MY attempt at selecting by id below does not work:

$("input #user_lat").val(results[0].geometry.location.lat());

Answer 1

If the id is to be applied to the input, the selector can have no spaces:

$("input#user_lat").doSomething();

If you place a space between input and #user_lat , the selector attempts to match a child of the input, which doesn't make much sense. It would be like having the following markup:

<input><el id="user_lat" /></input>

Removing the space matches any input that contains the ID:

<input id="user_lat" />

Answer 2

You must stick them together "input#user_lat"

input #user_lat means:
Look for an input and then find inside the element with id user_lat

Answer 3

您很接近，从第二条语句中删除“输入”，您应该会很好。

$("#user_lat").val(results[0].geometry.location.lat());

Answer 4

When you are usign the selector "input #user_lat" your saying the element "user_lat" inside an input. So what you need to do is just delete the space between them, something like this:

$("input#user_lat") ...