Trigger an 'onClick' via URL, but do not visit that URL - javascript

Trying to launch a click event of .register-btn a nav item when visiting a given URL, but not allow the browser to visit that URL.
So, home.com/memberlogin would remain on home.com ( or redirect to home.com if I must ), and proceed to activate the click of a button.
This is what I have so far, which redirects nowhere as that ended up taking longer than the click event, and it also was quite messy having to load the 404, then wait, then redirect, then wait, then wait for the click event.
I would like something clean and smooth if possible.
jQuery(document).ready(function() {
jQuery(function() {
switch (window.location.pathname) {
case '/memberlogin':
jQuery('.register-btn a').trigger( "click" );
return False;
}
});
});
Probably explained it dreadfully so apologies all - the .register-btn a already exists so I can't create this element, I simply wish to trigger the click for it when visiting a URL/link. Open to suggestions but I assumed something like /memberlogin would suffice, then the link would trigger. The snag is I don't want to "visit" that URL, but use it for the trigger only.
Open to an easier way and tell me if I am asking for something that doesn't work, just figured there must be a way.

Have you tried e.preventDefault() ?
click
and the jQuery:
$('.dontGo').on('click',function(e){
e.preventDefault();
//do stuff
})
fiddle: https://jsfiddle.net/b9x7x4m6/
docs: http://www.w3schools.com/jquery/event_preventdefault.asp

A full javascript solution is (snippet updated as asked):
window.onload = function () {
[].slice.call(document.querySelectorAll('.dontGo')).forEach(function(element, index) {
element.addEventListener('click', function(e) {
e.preventDefault();
alert(e.target.textContent);
}, false);
});
// in order to target a specific URL you may write code like in reported,
// assuming the result is only one element,
// otherwise you need to use the previous [].slice.call(documen.....:
document.querySelectorAll('.dontGo[href="linkedin.com"]')[0].addEventListener('click', function(e) {
e.preventDefault();
alert('Linkedin anchor: ' + e.target.textContent);
}, false);
};
stackoverflow <br/>
google <br/>
linkedin <br/>
twitter <br/>
The querySelector let you select elements in a lot of different ways:
if you need to select an anchor with a specific href value you can write:
document.querySelectorAll('.dontGo[href="linkedin.com"]')
Remember, always, that the result of querySelectorAll is a NodeList array. You can test against the length of such array in order to get, just for instance, only the second element if it exists, like:
var nodEles = document.querySelectorAll('.dontGo[href="linkedin.com"]');
if (nodEles.length > 1) {
nodEles[1]......
}
or you can use the format:
[].slice.call(...).forEach(....
to convert the NodeList to a normal array and than apply the event listener for each element.
Yes, you may prefix the href attribute of anchor tag with an hash (#) to avoid page redirecting. But, in this case, the hash tag is used to jump in another page section and this will change your url.

Simply create a function
function theAction(){
return false;
}
Then your link will be
page name

Related

Trigger Click event of anchor tag using jQuery

I am trying to trigger the click event of an a tag using jQuery and have seen many other Stack Overflow posts about this, but can't figure out why my replications of any of them are not working. My HTML is shown here:
<c:url var="link" value="/hardwareItems" />
<a href="${link}" id="goToHardwareItems">Go
to items</a>
And then here is my jQuery/JS:
$("#form").on("submit", function() {
if (confirm("Add hardware items?")){
$("#goToHardwareItems").trigger('click');
}
else {
window.location.href = "/home";
}
});
What I have is not working though, but when I actually click on the link, I am indeed taken to the page. So the problem is that the event is simply not triggering, even though I am also getting into the if statement. What am I doing wrong?
You can read the value of href and redirect. You are already doing so.
$("#form").on("submit", function () {
// Determine where to go based on user's response
var link = confirm('Add hardware items?') ? $('#goToHardwareItems').attr('href') : '/home';
window.location.href = link;
});

Refer to ID (as selector) that is already inside HTML link tags

I have a link that is generated by a core module (meaning I can't modify the code) as such:
<a id="my-unique-id-1" class="my-link-class" href="/switch off">Switch off</a>
Problem is, the ID and class are within the <a> tag and I do not have any useable elements wrapped around the link that I can use.
When clicked, it goes and do what it has to do server side (see code following), and then returns this:
<a id="my-unique-id-1" class="my-link-class it-is-off" href="/switch on">Switch on</a>
I want to replace or amend the complete first link.
First the jQuery script:
$(".my-link-class").click(function() {
var current_id = $(this).attr('id');
var link = $(this).attr('href');
$.ajax({url: link, success: function (result) {
//All works fine up to here. The changes are made in server side and returns the new link as the result.
//Following is my problem:
if(result){
$(current_id).replaceWith(result); //the selector is wrong, I know.
}
}
}
My problem is that the id (current_id) is already within a <a> tag.
How can I refer to the selector in the tag.
I tried:
$(current_id).replaceWith(result); //nothing happens
$('#' + current_id).replaceWith(result);
$('a#' + current_id).replaceWith(result);
But I get with the last two TypeError: Argument 1 of Node.appendChild does not implement interface Node.
(I know I can do other things than replaceWith such as changing text and href in link, but the problem here is to find the selector first).
You can just use $(this).replaceWith():
$(document).on('click', '.my-link-class', function() {
var html = '<a id="my-unique-id-1" class="my-link-class it-is-off" href="/switch on">Switch on</a>';
$(this).replaceWith(html);
return false;
});
.it-is-off {
color: green;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a id="my-unique-id-1" class="my-link-class" href="/switch off">Switch off</a>
I think there are two things happening here.
You are trying to use an ID to replace an element, when it would be easier to just keep a reference to the DOM element you want to replace rather than finding it twice.
You are binding an event to an anchor tag that you are then trying to replace. Once you replace it, the event will go away. The way to avoid this issue is bind your event to something that won't be changing. That can be the element right above the one you are going to replace, or it can be a much higher up element like the body element.
Here's a possible solution that fixes both problems. I've written a function called simulatedAjax to give an idea of what I think you're saying the backend code is doing. It follows the same idea as the jQuery $.get using the configurationObject, callback(result) signature.
function simulatedAjax(config, done){
var onOffText = (config.url === "on" ? "off" : "on");
done('Switch '+ onOffText +'');
}
And now your client code
$(function(){
// Bind the click to the body element, but with a delegate to your link class .custom-link
$('body').on('click', '.custom-link', function(e){
// Store a reference to the A tag, name is irrelevant but self is easy to understand
var self = this;
// Keep the page from actually navigating to the href
e.preventDefault();
//Replace with real jQuery $.get or $.ajax with configuration
simulatedAjax({
url: $(this).attr('href')
}, function(resultHTML){
// Since we stored a reference to the original in the self variable, we can just replace it here. Note that if we tried to use `this` here, it wouldn't refer to the right `this`
$(self).replaceWith(resultHTML);
});
});
});
You can see this code sample working in this JSFiddle http://jsfiddle.net/x83vfmuw/
Hope this helps!

Clicking a link programmatically after using preventDefault()?

I'm trying to change a href link programmatically (according to a result from an ajax async operation) and open it in a new window (I don't want to use window.open as it behaves like a popup and being blocked in IE).
The following code works only after clicking MANUALLY on the link for a second time, how can I make it work on the first click?
Simplified example:
trying to change href link dynamically
<script type="text/javascript">
document.getElementById('link').addEventListener("click", function (e) {
if (!e.target.hasAttribute("target")) //only preventDefault for the first time..
{
e.target.setAttribute("target", "_blank");
e.preventDefault();
updateLink();
}
});
function updateLink() {
// --HERE I PERFORM AN AJAX CALL WHICH TAKES A WHILE AND BY ITS RESULT I DECIDE WHICH URL TO USE - BUT HERE I JUST USE IT HARDCODED--
document.getElementById('link').setAttribute("href", "http://google.com");
document.getElementById('link').click();
}
I organized your code in this jsFiddle: http://jsfiddle.net/mswieboda/Hhj4D/
The JavaScript:
var $link = document.getElementById('link');
$link.addEventListener("click", function (e) {
if (!e.target.hasAttribute("target")) {
//only preventDefault for the first time..
e.target.setAttribute("target", "_blank");
e.preventDefault();
updateLink();
}
});
function updateLink() {
$link.setAttribute("href", "http://google.com");
$link.click();
}
This worked for me when I ran it. Hovering the link, you could see http://demo.com but clicking it takes you to http://google.com. Is this the desired functionality? You can definitely use the updateLink function any time (after an AJAX call) to change the href, also, you could probably set the _target in that function as well, makes more sense to me that way.

What is the proper method for creating dynamic hyperlinks in JavaScript?

I know it's frowned upon to create links such as link text as this tricks the user into thinking it's a real link.
I have quite a few links that actually just run JS code in the browser instead of forcing page navigation, and as such I don't want to use the above and am looking for an alternative that works in all browsers and prevents middle clicking from opening a new tab/ window.
Would the following approach be satisfactory?
HTML
link text
JavaScript
$("#id_here").bind('click',(function(params){
return function(){
// do stuff here with `params`
};
})(params));
javascript: anything is bad. There isn't much difference between the two javascript: uses above. Using "#" for the href is about as bad; it adds to the history with JS off and the link is not useful. What you should do (ideally) is have the link actually work, e.g.
<a href="/an/actual/path"> ...
Then, with JS, prevent default link behavior
$("#id_here").on('click', function (e) { e.preventDefault(); });
If there is no actual path to go to, then the link should not even be exposed with JS off; you can either append it to the DOM later or just hide it with CSS (and show it with JS).
I would recommend you used another node other than <a>, such as a <div>:
<div id="jsLink" style="cursor:pointer">Click Me</div>
and jQuery:
$("#jsLink").click(function(params){
// do something
}
link text
# is here to make a link look like link
JavaScript:
$("#id_here").bind('click',function(e){
e.preventDefault();
})
e.preventDefault() does not allow browser to execute default action (like navigate to another page)
I did some playing around, and you can get some good results with hashchange:
var commands = {
foo: function() { alert("Foo!"); },
bar: function() { alert("Foo bar!"); },
baz: function() { alert("Foo bar baz!"); }
};
$(window).bind('hashchange', function() {
var hash = window.location.hash.replace(/^#/,'');
if(commands[hash]) {
commands[hash]();
return false;
}
}).trigger('hashchange');​
With the simple HTML of:
Foo
Bar
Baz​
This even works if you right click -> open in new tab or middle click!
Note that hashchange is not supported by all browsers.

Javascript substring method assistance

So long story short im working on a web app and using AJAX within it.
I'm trying to disable the default actions of links when clicked, attach a hash value to the link and then remove the "#" from the url.
the problem im having is that, although the hash values are being attached accordingly, the substring method isnt extracting the "#", it extracts the letter after it.....
here is my code. PS, i left my comments inthere so you get where im trying to go with this
so i dont know....my logic or setup may be wrong....
$(document).ready(function(){
//app vars
var mainHash = "index";
var menuBtn = $('.leftButton');
//~~~~~~load the index page at first go.
loadPage();
//~~~~~~~~~~~~~~~~~~~~~~~~~~~menu show/hide
menuBtn.click( function(){
$('#menu').toggleClass();
});
//Menu items on click , disable link default actions.
$('#menu a').click( hijackLinks );
//~~~~~~~~~~~~~~~~~~~~~~~~~~~functions for mobile index load AND hijacking app links to AJAX links.
function loadPage(url){
if( url == undefined){
$('#contentHere').load('index.html #content', hijackLinks);
window.location.hash = mainHash;
} else {
$('#contentHere').load(url + '#content', hijackLinks );
}
}
function hijackLinks(e){
var url = e.target.href;
e.preventDefault();
loadPage(e.target.href);
window.location.hash = $(this).attr("href").substring(1);
}
});
what im wanting is to remove the "#" from the url. What am i doing wrong, what am i not seeing/understanding?
ive tried substring/substr etc and both do the same thing in that no matter what numbers i choose to insert into the substrings params, they remove EVERYTHING BUT the "#" lol....
Thanks in advanced.
Well, you don't really change the link itself, you only change the window.location.hash, and the hash always has a "#" at the beginning.
What you need to do in order to change the entire url (and remove the '#') is to manipulate the browser history.
Although you should know it works only in newer browsers (the exact browser versions are in the link), so if you target your website to older too browsers you might need to think about having a fallback using the hash. If you decide to have such a fallback, I suggest searching for a plugin which does it instead of making it all yourself.

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