URL parameters determine load() url - javascript

I am building a jQuery based web app and I want to use URL parameters to navigate around it.
I would like to display content based on the URL parameter, with the 'load()' function getting the main body of the web page from an external URL and replacing an element with it.
How would I create an if statement that use the following conditions...
If there are no parameters in the url, then use $("#toBeReplaced").load("home.txt");
If the parameter page is equal to about, then use $("#toBeReplaced").load("about.txt");
If the parameter page is equal to contact, then use $("#toBeReplaced").load("contact.txt");
...to determine what page of the app to display.

You can simply load the url using page variable if it is undefined then load home otherwise load whatever is in page variable.
var page = location.search.substring(1).split('=')[1];
if (page == undefined)
$("#toBeReplaced").load("home.txt");
else
$("#toBeReplaced").load(page + ".txt");

You can use different libraries or jQuery plugins to get url parameters in js. For this example I will use js-url. Include the url.min.js file into your page. Then just use this to get the parameter page by url("?page") and create a simple if.
$(function() {
var page = url("?page");
if( page === "about" ) {
$("#toBeReplaced").load("about.txt");
}
else if( page === "contact" ) {
$("#toBeReplaced").load("contact.txt");
}
else {
$("#toBeReplaced").load("home.txt");
}
});

Related

taking the # out of url on location.hash

function updateView(category) {
console.log( window.location.hash );
if (location.hash !== ""){
//convert #3 to 3.
//load video based on id
//myArray[sanitizedHash];
} else {
updateCategoryLabel(category);
currentList = updateVideosList(category);
chooseRandomVideoFromList();
}
}
This function is loaded on page load
How can I parse inside this function so that the the location.hash's '#' will be taken out of the URL?
In short I am trying to achieve www.mysite.com/3 versus www.mysite.com/#3
Thanks in advance!
Edit: I should add that the 'else' is basically randomizing on page load versus going to the direct url. This if statement will run on page load to check if the hash exists otherwise it will randomize as usual.
Altering the URL from 'www.mysite.com/#3' to 'www.mysite.com/3' will cause the browser to navigate to a new URL since www.mysite.com/3 is not the same page as www.mysite.com/#whatever.
If you just want a string with the first character of the hash trimmed try:
window.location.hash.substr(1)
You can get the window.location.hash and then replace the # with an empty string
if (location.hash !== ""){
var sanitizedHash = window.location.hash.replace("#", "");
//load video based on id
//myArray[sanitizedHash];
}
If your goal is NOT to trigger page load, you can use HTML5 History API to change URL from www.mysite.com/#3 to www.mysite.com/3 like that:
var id = location.hash.substr(1);
history.replaceState({id:id}, id, id);
Note that replaceState is used, because otherwise user can press back button to the browser and get back to the #3. If you want to allow that, replace replaceState with pushState. Hope that helps.

Triggering Script VIA URL variable

As of now, on my page, the following html is working fine to trigger the following javascript function :
Link to other section
What I'd like to do is to have the javascript function triggered on page load when a specific variable is added to the URL. (Instead of having it as a link on the page)
For example, if url is www.mysite.com, page loads normally. If URL is www.mysite.com/?variable=1 , the script is triggered and user is redirected.
(I know there are other ways to redirect a user to another page, but I need to use this specific script, since the destination is dynamic from one type of user to another.)
I have very basic javascript knowledge and can't make the code I found here work : Triggering Script VIA URL . What they're doing is triggering a fancybox through URL variable. I believe that it's the same thing I want to achieve here. I'm just not to sure how to modify the code to go from "fancybox" to "redirectToOtherSection()"
var $j = jQuery.noConflict();
$j(document).ready(function() {
var url = window.location.href;
url = url.toLowerCase();
if (url.indexOf('globe=1') != -1) {
$j("a#fancy").fancybox({
'padding': 0,
'overlayShow': false // extra comma removed
});
}
}); // extra curly bracket removed
$j("a#fancy").fancybox({
'padding': 0,
'overlayShow': false // extra comma removed
});
They are using jquery, not sure if jquery is needed in my case?
Any help is much appreciated!
Thanks
based on what you've said you dont need jquery, try
var url = window.location.href;
url = url.toLowerCase();
if (url.indexOf('variable=1') != -1) { // where variable 1 is wqhats in you url
redirectToOtherSection();
}

How do you get an iframe to load content from a link on another page?

Here's the scenario:
I have a link on "page1.html" that i want to get displayed on an iframe of another link "page2.html" .
How do I do this?
Fourth and final try!
The problem with your page is the following
Your problem is that your link [See adoptable dogs] points to http://hssv.convio.net/PageServer?pagename=adoption_available?http://adopt.hssv.org/search/searchResults.asp?task=search&searchid=&advanced=&s=adoption&animalType=3%2C16&statusID=3&submitbtn=Find+Animals
When I go to
http://hssv.convio.net/PageServer?pagename=adoption_available,
I'm redirected to
http://hssv.convio.net/site/PageServer?pagename=page_not_found
Therefore I assume the correct link is http://hssv.convio.net/site/PageServer?pagename=adoption_available (yup, that loaded a page correctly, you were missing /site/ within the link)
Now the second part of your problem. Your page that contains an iframe expected the name of the page to load into the iframe to be everything after the '?', which was fine before since you were't using any other params in the URL (actually not fine, since it breaks easily)
so your link should be (note that the url passed as a parameter should be url encoded)
http://hssv.convio.net/site/PageServer?pagename=adoption_available&content=http%3A%2F%2Fadopt.hssv.org%2Fsearch%2FsearchResults.asp%3Ftask%3Dsearch%26searchid%3D%26advanced%3D%26s%3Dadoption%26animalType%3D3%2C16%26statusID%3D3%26submitbtn%3DFind%2BAnimals
And your page containing the iframe should modify LoadContent to the following.
function LoadContent() {
var url = getParams()['content'];
if (url) {
LoadIFrame(url);
}
}
function getParams() {
var paramMap = {};
if (location.search.length == 0) {
return paramMap;
}
var parts = location.search.substring(1).split("&");
for (var i = 0; i < parts.length; i ++) {
var component = parts[i].split("=");
paramMap [decodeURIComponent(component[0])] = decodeURIComponent(component[1]);
}
return paramMap;
}
Lastly, I don't want to sound rude, but it seems like you need to do some studying before you are assigned to modify these pages. These are all very basic concepts of HTML, HTTP, and JS. Some debugging would easily identify your problem and it had nothing to do with what you asked initially, it was simply that you modified code without a clue to what it was doing...

Facebook Changes Page URL but does not actually change page

I was on Facebook and realised that when I change page the page address changes but the page does not redirect but loads via ajax instead.
You can tell because the console does not clear when you click the link but the URL changes.
Weird, but anyone know how it is done?
Facebook runs with massive AJAX calls that changes the page state and the sections.
So to make a page linkable to somebody by copying the URL address, every time you call an AJAX relevant function they updates the URL using a fake anchor "#!" plus the real address.
Simply when you load the real page (using F5 or linking that so somebody) a JS parser catchs the string after #! (if there is) and redirect you to baseaddress + that.
I belive something like this (untested):
var urlstr = new String(location.href);
var urlparm = urlstr.split('#!');
var last = urlparm.length - 1;
if( (urlparm[last] != urlparm[0]) && (urlparm[last] != "/") )
{ var redir = "http://www.facebook.com" + urlparm[last];
location.href = redir;
}
In Google Chrome instead the URL really changes, I'm according that there is an hash somewhere, but I don't know where and how.

How to use javascript to get information from the content of another page (same domain)?

Let's say I have a web page (/index.html) that contains the following
<li>
<div>item1</div>
details
</li>
and I would like to have some javascript on /index.html to load that
/details/item1.html page and extract some information from that page.
The page /details/item1.html might contain things like
<div id="some_id">
picture
map
</div>
My task is to write a greasemonkey script, so changing anything serverside is not an option.
To summarize, javascript is running on /index.html and I would
like to have the javascript code to add some information on /index.html
extracted from both /index.html and /details/item1.html.
My question is how to fetch information from /details/item1.html.
I currently have written code to extract the link (e.g. /details/item1.html)
and pass this on to a method that should extract the wanted information (at first
just .innerHTML from the some_id div is ok, I can process futher later).
The following is my current attempt, but it does not work. Any suggestions?
function get_information(link)
{
var obj = document.createElement('object');
obj.data = link;
document.getElementsByTagName('body')[0].appendChild(obj)
var some_id = document.getElementById('some_id');
if (! some_id) {
alert("some_id == NULL");
return "";
}
return some_id.innerHTML;
}
First:
function get_information(link, callback) {
var xhr = new XMLHttpRequest();
xhr.open("GET", link, true);
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
callback(xhr.responseText);
}
};
xhr.send(null);
}
then
get_information("/details/item1.html", function(text) {
var div = document.createElement("div");
div.innerHTML = text;
// Do something with the div here, like inserting it into the page
});
I have not tested any of this - off the top of my head. YMMV
As only one page exists in the client (browser) at a time and all other (virtual/possible) pages are on the server, how will you get information from another page using JavaScript as you will have to interact with the server at some point to retrieve the second page?
If you can, integrate some AJAX-request to load the second page (and parse it), but if that's not an option, I'd say you'll have to load all pages that you want to extract information from at the same time, hide the bits you don't want to show (in hidden DIVs?) and then get your index (or whoever controls the view) to retrieve the needed information from there ... even though that sounds pretty creepy ;)
You can load the page in a hidden iframe and use normal DOM manipulation to extract the results, or get the text of the page via AJAX, grab the part between <body...>...</body>ยจ and temporarily inject it into a div. (The second might fail for some exotic elements like ins.) I would expect Greasemonkey to have more powerful functions than normal Javascript for stuff like that, though - it might be worth to thumb through the documentation.

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