Changing a checkbox's state programmatically in dashcode

问题

Okay, so I'm trying to change a checkbox's state programmatically in dashcode. I've tried:

var checkbox = document.getElementById("checkbox");

// I have tried all the following methods.
checkbox.checked = false;
checkbox.selected = false;
checkbox.value = false;

回答1:

Dashboard Widgets just run on WebKit technologies, so code valid for Safari should also be valid in Dashcode. Either of the following should work:

checkbox.checked = true;
checkbox.setAttribute("checked", "true");

The fact that they are not working indicates there is a problem elsewhere in your code. I would check the line

var checkbox = document.getElementById("checkbox");     

Correctly assigns an element to the checkbox variable. Also, check the id of your "checkbox" element is valid and correct (not a duplicate, doesn't have a typo, etc).

回答2:

This question is one month old as I write this answer. It was probably already solved, but in any case I would like to add that if you are using Dashcode, the Checkbox part is a div which contains one label and one input, this one being the "real" checkbox.

If you inspect the html as it is loaded in Safari you will notice that "checkbox" is the type of the element.

Therefore the proper way to change the state of the checkbox would be, assuming "input" is its id (it could have a default number attached though):

document.getElementById("input").checked="true";

or whichever method you want to use.

The main point here is that you were trying to change the state of another div.

Hope it helps!

回答3:

checkbox.setAttribute("checked", "checked"); // set
checkBox.removeAttribute("checked"); // remove

回答4:

This question has been around a while. Regardless, the following works for us:

checkbox.childNodes[1].checked = true; checkBox.childNodes[1].checked = false;

As pointed out in a previous answer, the way Dashcode creates these controls you need to get past the div wrapper, which has the actual ID (checkbox in this example) and set the property for the input, which is child node 1.

Looking for the actual 'id' of the input would be problematic as you have no control over what id's are assigned to the node. For example if you have two checkboxes then the first one would have 'input' as the id for child node 1 and the second one 'input1', unless, of source you have used 'input' or 'input1' as an id somewhere in your design already!

There might be another method but I have not found it yet.

回答5:

I don't know which browser you used, but when I tested on FF 3.6, it works. just put like this:

checkbox.checked = false;

while:

checkbox = document.getElementById('blablabla');

or write like that

document.getElementById('idhere').checked = false;

回答6:

Maybe:

checkbox.checked = "checked";

Then:

checkbox.checked = "unchecked";

回答7:

cell = row.insertCell(-1);
sel = document.createElement('input');
sel.setAttribute("type", "checkbox")
sel.setAttribute("name", "myCheckBox")
cell.appendChild(sel);
cell.getElementsByTagName('input')[0].checked = true;

I create a table, row then cell and create a checkbox within it. I can the grab hold of the first input object and set the checked status to true.

回答8:

var checkbox = document.getElementById("checkbox"); 

there is a problem with this line, it should be

var checkbox = document.getElementById('#checkbox");

来源：https://stackoverflow.com/questions/2488806/changing-a-checkboxs-state-programmatically-in-dashcode