如何从javascript更改密码字段的文本？

Question

I have an chrome extension in which I want to automatically fill in a username and password field with information the user has entered already (into my application) by running external javascript on the page. I figured out how to fill in the username, but I can't figure out how to automatically check a checkbox or fill in the password.

Answer 1

Without jQuery, one can do as follows:

document.getElementById( "password" ).value = "Value";
document.getElementById( "checkbox" ).checked = true;

of course replacing "password" with the ID of the password input box, and the same with "checkbox" .

Answer 2

if you're using jQuery you can do this:

$('#password').val('whateveryouwant');
$('#checkbox').attr('checked','checked');