Dynamically create <input>
s in a form and submit it
/**
* sends a request to the specified url from a form. this will change the window location.
* @param {string} path the path to send the post request to
* @param {object} params the parameters to add to the url
* @param {string} [method=post] the method to use on the form
*/
function post(path, params, method='post') {
// The rest of this code assumes you are not using a library.
// It can be made less verbose if you use one.
const form = document.createElement('form');
form.method = method;
form.action = path;
for (const key in params) {
if (params.hasOwnProperty(key)) {
const hiddenField = document.createElement('input');
hiddenField.type = 'hidden';
hiddenField.name = key;
hiddenField.value = params[key];
form.appendChild(hiddenField);
}
}
document.body.appendChild(form);
form.submit();
}
Example:
post('/contact/', {name: 'Johnny Bravo'});
EDIT: Since this has gotten upvoted so much, I'm guessing people will be copy-pasting this a lot. So I added the hasOwnProperty
check to fix any inadvertent bugs.
Using
$("a").attr("href", "http://www.google.com/")
will modify the href of all hyperlinks to point to Google. You probably want a somewhat more refined selector though. For instance, if you have a mix of link source (hyperlink) and link target (a.k.a. "anchor") anchor tags:
<a name="MyLinks"></a>
<a href="http://www.codeproject.com/">The CodeProject</a>
...Then you probably don't want to accidentally add href
attributes to them. For safety then, we can specify that our selector will only match <a>
tags with an existing href
attribute:
$("a[href]") //...
Of course, you'll probably have something more interesting in mind. If you want to match an anchor with a specific existing href
, you might use something like this:
$("a[href='http://www.google.com/']").attr('href', 'http://www.live.com/')
This will find links where the href
exactly matches the string http://www.google.com/
. A more involved task might be matching, then updating only part of the href
:
$("a[href^='http://stackoverflow.com']")
.each(function()
{
this.href = this.href.replace(/^http:\/\/beta\.stackoverflow\.com/,
"http://stackoverflow.com");
});
The first part selects only links where the href starts with http://stackoverflow.com
. Then, a function is defined that uses a simple regular expression to replace this part of the URL with a new one. Note the flexibility this gives you - any sort of modification to the link could be done here.
Best Answer
The
show()
method only affects thedisplay
CSS setting. If you want to set the visibility you need to do it directly. Also, the.load_button
element is a button and does not raise asubmit
event. You would need to change your selector to theform
for that to work:Also note that
return true;
is redundant in your logic, so it can be removed.