Develop Reference

Detect if tag is in URL and then remove hidden class

I have a form on my contract form, which submits to a third party site and then I can define a URL to return the user to. I currently return the user to the same /contact page but I wanted to give them a message that it had submitted (since ajax forms don't work with the third party) and I don't want to have a whole page for it.
Therefore I had the idea to return the user to /contact#thanks
I have some code on my site which goes like this:
<div id="alert" class="hidden">Form Submitted. We will reply soon.</div>
Now I want a small bit of javascript on my page which detects if the URL has the #thanks tag on it, as above, and then removes the hidden class from my alert div. Is javascript able to detect this and if so, how do I go about it?

Include jquery and script. I test and work
$(document).ready(function(){
if(window.location.hash) {
$("#alert").show()
}
});
Siii = Yes use hash

I'm not totally sure that I've understood what are you trying to achieve, but this might help you:
if (window.location.hash === '#thanks') {
document.getElementById('alert').classList.remove('hidden');
}

Detect which link was clicked with javascript that got user to specific page

Been searching on the web for a solution, but couldn't find anything, so maybe it's not possible, although I hope it still is.
What Im trying to do is detect the button (class or id) that was clicked when being redirected to another page on my site.
What I have is a portfolio page that contains a large amount of divs with different classes, so when someone clicks on a specific button on the homepage and gets redirected to the portfolio page, is it possible to detect on the portfolio page how the visitor got directed from. So detect which button got clicked.
no idea how to approach this, something maybe with if previous window.location last action find class or id.
Hopefully my question makes sense and someone can give me an idea if even possible.
I imagine it would rather be possible to do with php, but unfortunately server side languages are not an option in this case.
Thanks

Examples of methods you can use
add the information in the originating url - use location.search or location.hash depending on your choice of ? or #
Set a cookie (or use session/localStorage in modern browsers) in originating page and read it in the target page
Interrogate document.referrer (not always set)

You can't do it without either modifying the links (adding a query string or hash), or having code on the source pages (where the links are).
The former is pretty obvious: Just add a query string or hash (I'd use a hash) that identifies where the click came from, and look for the hash on the portfolio page. E.g., links:
Portfolio
Portfolio
and in the portfolio page:
var from = location.hash;
If you don't want to do that, and you can put code on those pages, it's easy: Add a click handler that sets information about the link in sessionStorage (very well-supported on modern browsers), and look for it in sessionStorage when you get to the portfolio page.
E.g.,:
$(document).on("click", "a", function(e) {
// Maybe check the link is going to portfolio, or refine the selector above
sessionStorage.setItem("linkFrom", this.className);
});
and then in the portfolio page:
var from = sessionstorage.getItem("linkFrom");

You can use window.localStorage to save the last id of the clicked element.
localStorage.setItem('last_clicked_id', id);
And then read it in the next page:
localStorage.last_clicked_id
Before running you should check for localStorage support:
if(typeof(Storage) !== "undefined") {
//localStorage code
} else {
//no localStorage support
}

this is how it works: the recent page or url is set on the URL parameters like a GET server request, but instead the client will receive it and parse it not the server. the recent page or url is on the "fromurl" parameter. on every page put this in (it's a javascript code):
function getURIparams(s) {
loc = window.location.href;
loc = loc.substring((loc.indexOf("?")+1));
loc = loc.split("&");
for (l = 0; l < loc.length; l++) {
lcc = loc[l].split("=");
if (lcc[0] == s) {
return lcc[1];
break;
}
}
}
next on every anchor link put this in href:
The Link to another page
after that, on every page execute this javascript:
from_url = getURIparams("fromurl");
the "from_url" variable will be the string variable of where the user clicked before it comes to that page.
if you are to lazy to put all those anchor one by one like this, do this work around but you need jquery for this. you dont need to put the parameter on the links for it to know where it comes from it will be automatically added by jquery.
$(document).on('click', 'a', function(e){
e.preventDefault();
window.location.href = e.target.href + "?fromurl=" + window.location.pathname;
});

Finding actual URL from <a href="#"

A page source snippet has the HTML:
Next
I know that the "#" is a placeholder that is handled by Javascript on the page. I believe the relevant Javascript snippet is:
function changepage(start) {
makerequest('/ajax/inventory_search.php', collectformvalues(start));
}
// do not flash the search options when using next/prev - just when the search is changed
function changepageforpagerlink(start) {
doEffectOnAjax = false;
changepage(start);
return false;
}
I need to know if there is a way that I can submit a URL and have the next page's page source returned. Is there a URL that is submitted at all in the above example?
My environment is VBA. I'm not using a browser, just communicating with the server. One thing I thought of is to mimic the "makerequest" function, but I don't know how to do that or if would even work. I know at the heart it's all just sending text to the server and receiving text back so I would think there is a way. . .
Bottom line is that I need to access the page source from the next page via VBA and not using a browser.

you can use JQuery to achieve this:
function changepage(start) {
makerequest('/ajax/inventory_search.php', collectformvalues(start));
}
changes to
function changepage(start) {
$.ajax({
type:POST,
url:"/ajax/inventory_search.php",
}).done(function(){
//do anything when it's done.
});
}

How to write a Google Content Experiment that disables a stylesheet?

I am currently trying to setup a Client Side Experiment without Redirects as opposed to the default Content Experiment A/B testing. All I want to do is for half my visitors disable one of two existing stylesheets on a page.
To me it doesn't make sense to do this the default A/B way because then I would have to setup a second page with the stylesheet disabled for every page on my site.
There is also Running a Server-side Experiment but to me that is too heavy handed for something I think should be somewhat simple.
I have the js all setup, I just need to be able to tell the page that when there is a given variation disable the stylesheet or don't render the stylesheet before the DOM loads.
One thing I considered is, given a certain variation, redirect to the same page but append a url query parameter like &stylesheet_disabled=true then I would simply not render the stylesheet on the server side but when I briefly looked at that I ran into a redirect loop but perhaps someone has a better way to write the js.
Any help greatly appreciated.

You could do something like this:
<head>
...
<script>
if (cxApi.chooseVariation() != 1) { // not in the experiment
document.write('<link href="... />'); // add the stylesheet
}
</script>
...
Only use document.write while the page is still being loaded.
This is all client-side, so no need for redirects and extra server work.

Here is how I did it:
<head>
<script src="//www.google-analytics.com/cx/api.js?experiment=EXPERIMENT_ID"></script>
<script>
// Ask Google Analytics which variation to show the visitor.
var chosenVariation = cxApi.chooseVariation();
function redirectVariation($variation) {
var url = window.location.href;
if ($variation === 1) {
var queryString = document.location.search;
if (queryString.indexOf("stylesheet_disabled=true") == -1) {
if (Boolean(queryString)) {
url += "&stylesheet_disabled=true";
} else {
url += "?stylesheet_disabled=true";
}
window.location.href = url;
}
}
}
redirectVariation(chosenVariation);
</script>
This is only setup for one different variation but could easily be modified for more. Then you just have your application on the server side detect the presence of the querystring parameter and execute whatever logic you like, in my case not displaying a stylesheet.
Theoretically this could be used to do any kind of server side logic with GA Content Experiment Client Side Redirects. Hopefully this helps someone else.

How do I change this JavaScript?

I want to change the way that content is displayed on my website:
var FNav = {
init: function() {
$("a[href*=#]").click(function(e) {
e.preventDefault();
if($(this).attr("href").split("#")[1]) {
FluidNav.goTo($(this).attr("href").split("#")[1]);
}
});
this.goTo("home");
},
goTo: function(page) {
var next_page = $("#"+page);
var nav_item = $('nav ul li a[href=#'+page+']');
$(".page").fadeOut(500);
next_page.fadeIn(500);
How do I change this JavaScript, so I can have a proper back button functionality?
What I have tried (Unsuccessfuly). These are the solutions that I tried but without changing the javascript above. That is why I think none of them seem to work.
Using the History.js method described here:
https://github.com/browserstate/history.js/ I fill out all the steps and
enter the scripts to the header, however only the URL in the URL bar
changes when I click on a link. When I click the Back button, the URl
changes accordingly, but content doesn't load. When I enter a URL in
the URL bar, I get sent to the home page.
Ajaxify and Gist method
described here: https://github.com/browserstate/ajaxify Achieves the
same as above, same issues as well
Davis.js method described here:
https://github.com/olivernn/davis.js Achieves nothing upon completion
of the installation instructions. No change.
jQuery BBQ Plugin method
described here: http://benalman.com/projects/jquery-bbq-plugin/
Achieves nothing, no change upon loading the .js file in the header
of the website.
I read this article and understood it:
http://diveintohtml5.info/history.html

I'm not sure why you couldn't get Davis.js to work for you? Perhaps open an issue on the GitHub page.
If you want to use hash based routing with davis you need to include the hash routing extension. You then just need to include it in your page after davis.
The following setup should then allow you to handle routes
Davis.extend(Davis.hash)
Davis(function () {
this.get('/:page', function (req) {
FluidNav.goTo(req.params.page);
})
})
Assuming you have links in your page with the following
Page1
Page2
Davis will take care of handling the back button for you, so that if you click on the link for Page1 and then Page2, clicking on the back button will navigate to Page1 again.
If you have any problems please open an issue on the GitHub page detailing what you have and what isn't working and I can take a look at it.

The back button does not magically work. You need to code and listen for the event change!
In history.js, it shows you right on the front page:
// Bind to StateChange Event
History.Adapter.bind(window,'statechange',function(){ // Note: We are using statechange instead of popstate
var State = History.getState(); // Note: We are using History.getState() instead of event.state
History.log(State.data, State.title, State.url);
});