jQuery+ AJAX + Help Hiding This Content - javascript

First of all: I hope the following question is not too generic.
I have a small problem and I cant think of a good solution and I was hoping some1 here is able to help me.
This is my situation:
I am using AJAX to dynamically load pages. My main site is index.php and once I click on a navigation link, the AJAX script replaces the content of index.php with new content and adds a hash tag to the URL. For instance:
I click on the link to about.php, the script adds #about.php to the URL and loads content from about.php into index.php. It works great :) However, there is a small issue that I would like to resolve:
Lets say we start by navigating to index.php#about.php directly - this means the content of index.php is visible for 2,3 seconds and than gets replaced with content from about.php. And I would like to avoid that.
I came up with a few ideas, but they are all not really great:
1) Hide content -> than make AJAX call -> on completed AJAX show content again
Downside: The content is still visible for a second.
2) Hide content with CSS and show it after AJAX call
Downside: This would work perfectly, but users without Javascript (and the GoogleBot) will see an exmpty page only.
3) Use an empty index.php and put the content of it in main.php and automatically load main.php via AJAX on page load.
Downside: Would work too, but again, users without JS and GoogleBot will just see an empty page when the visit index.php
Thats all I can think of and all three solutions are not good, because I am worried the SEO value will dramatically decrease when I have an empty index.php (I could accept that users with no JS get nothing to see).
p.s. I read somewhere that when you have display:none in an external css file and block it with robots.txt, GoogleBot wont know the difference, but I am worried thats maybe not the case? Any1 got some experience?
Edit: I guess my whole question comes down to this:
Do you think hiding the whole content of index.php with CSS (and than show it with JS), will be a huge no-go for SEO or will it be okay with GoogleBot (afterall the content is still in the source, but not visible to the user)?

If you used query strings instead of the hash you could have index.php load the correct content at the server level.
A plugin like history.js can help you push URLS to the browser so that you still get your ajax browsing.

Wow where to start...first of all the page 'blink' I'll call it is 2-3 seconds for you but it is completely dependent on the users computer, how fast it executes the javascript, and how fast the AJAX call returns so you could have a much larger delay.
Second I wouldn't worry about Googlebot seeing any of the ajax content. While it's true googlebot does try to fiddle with some javascript it won't make the ajax call like a normal browser would. I'd be very surprised if Googlebot ever saw any of your Ajax loaded data.
Googlebot does a fantastic job of figuring out what content is delivered via html/css to a user when they visit your page. It also figures out if something is displayed or not and does a good job of deciding if that content is just stuffing or is something that really matters.
You're worried about what someone without javascript will see when the entirety of navigating your site is based in javascript. This doesn't seem to reconcile.
You've got PHP available. My suggestion is to forgo the AJAX stuff you're trying to do and do it in PHP. You can just as easily script the same behavior in PHP as you can in AJAX.
SEO NOTES:
If you're looking for solid SEO results I suggest making the static (non-javascript version) page as SEO friendly as possible. I like to 'pick the low hanging fruit' like making sure the page has one and only on H1 and that it has the most important keywords in it. seomoz is one of the best sites I've found for seo information.

Related

jQuery loses ability to read HTML and CSS tags inside AJAX script after location hash change

I'm experiencing some issues regarding an AJAX script I'm working on.
The page loads perfectly well, and all needed scripts are loaded the same for basic page functionality inside AJAX script, but after hash change, jQuery behaves awkwardly.
Let's take this example.
The custom jQuery script writes an inline CSS propriety for a specific DIV at page loading:
Now, I load the login page for example:
I get back to the main page and inline style disappears as well as the basic loaded functionalities cease to exist after Ajax call:
*
Any experience on this? Does anyone have a clue why this happens? Or even near it... Seems the script unloads on page/hash change, which I don't believe. Or enters in double loop, therefore doubling the classes for HTML. I don't get it.
Already searched a lot and went trough the coding and is fine becasue it works fine alongside with basic HTML. Would appreciate some thoughts on this matter.
Thanks!

Javascript linking to other pages

We're running over a problem here. We have a website which shows a header, content and a footer. Now, when clicking on a link we want just a part of the site (content-part) to be refreshed to save some traffic. The header and footer should stay as they're. We tried to use the following script for that:
http://www.dynamicdrive.com/dynamicindex17/ajaxcontent.htm
Well, the script is not doing great on our site. Any other JS-Code does not get executed at all. The GET-Tags in the URL are not displayed aswell. Everything else works with that script.
Do you have knowledge about any other alternatives to this script?
Regards,
I agree, Ajax is the way.
You can include jQuery.
Have a look at these links.
http://api.jquery.com/jQuery.ajax/
In particular jquery load() function
$('#result').load('ajax/test.html');
a little jsFiddle
http://jsfiddle.net/james_nicholson/c6dpn/5/
please note: $("#content").load("a/html/page/that/should/be/on/your/server");
.load(); <- needs to have a local page, PHP and or HTML will do.
http://api.jquery.com/load/
When you say 'Any other JS-Code does not get executed at all', do you mean at any time from when the page loads initially, or only when the content part is refreshed?
For dynamic adjustment in javascript i would recommend http://angularjs.org/ or http://knockoutjs.com/ , try this out and work through tutorials and you will see how easy it is to change everything without refreshing.
I'd say you only need AJAX if you get some data from a database. Otherwise it's enough to work with AngularJS or KnockoutJS. Have a look at it!
Regards

How to stop page load in html static page

Is there in HTML (javascript) or other static html tech
can:
Stop page loading (if browser does not download yet)
Stop page rendering (from where the code placed)
Stop javascript executed (from where the code placed)
Simply put, is there a code like
<script>window.StopWhateverBelow()</script>
To let browser totally ignore whatever below the code.
UPDATE
I understand the browser may already download the whole thing. What I want is, from the code, page should stopped, for example: if I put the code just after <body> visitor should see blank page, if I put the code in middle of the page, page should be just half like you pressed ESC
ANSWER
As bukko suggested, comments done the trick. But not full, just half
If you put <!-- in html page, the rest will be ignored. And in Javascript
document.write('<!--');
Done the trick.
For about make sense:
Here is how this code make sense: when you page load some offpage script, the script is dynamic. When the script code found something wrong (or match some condition), you have one more option to stop the page from rendering, loading, download...
You could do window.stop(); for most browsers besides Internet Explorer. For IE, I had to use document.execCommand('Stop');
If you already have html comments on your page, #bukko's solution doesn't fully work. Stuff after the html comment will get rendered normally.
Something else to try is:
document.write('<script type="text/undefined">')
The rest of the document gets interpreted as part of the script tag, and because the script isn't text/javascript, it gets ignored.
Worked for me, thought I'd share it.
Edit
I've seen the script trick not work in Chrome.
This does work, but I have not done extensive browser testing:
document.write('<style type="text/undefined">')
window.stop(); //works in all browsers but IE
if ($.browser.msie) {document.execCommand("Stop");}; //works in IE,
document.execCommand works in IE, however it does stop some of FF, NS and some other browsers' functions. Like displaying GIF's animation for example. Using "if browser is IE" makes these two codes work perfectly in all browsers.
Well, there is:
<!--
terminated by
-->
for HTML, but scripts will ignore this.
What you are asking makes no logical sense. Simply for two reasons:
Data is ALREADY sent to the user (HTML / JS) so even tho if you COULD hide content, the data would sitll be there for a user to see (if they view source for instance).
Why would you stop 'execution' of a page? It loads simple html structure and reults in a visual display, you should focus on the server site (php for instance) to hide or not send the content in the first place.
If you want to visually hide elements tho, you could use CSS styles (hide divs or the like) with simply adding style="display:none;" to a div like so:
<div style="display:none;">
This text will be downloaded by the user, but hidden from view due to CSS inline style
</div>
If you want to add commenting (thats just for your reference), then use comment formatting:
<!-- this is a comment and will not show up to a user -->
Reference for comments: http://htmlhelp.com/reference/wilbur/misc/comment.html
put window.Stop() wherever you want to stop the page from getting renderred
You could also hide the body like that:
var style = document.createElement("style");
style.innerHTML="body { display:none !important; }";
document.getElementsByTagName("HEAD")[0].appendChild(style);
HTML is static content so the server reads whatever you have written in the file unless you comment it out. For a dynamic file like what you are asking for you need to use php which can do this type of thing.
Just not much related to the question, but I thought it may be useful for some persons. If you want to jump to other page during page loading use window.location = "somepage.html"; or you can redirect users to the previous page: window.history.go(-1); Useful in JavaScript conditional statements
If you are using ASP or PHP, HTTP protocol automatically stops but HTTPS protocol don't stop automatically.
To stop it use:
In ASP:
dim r= accept.secure.protocol
r.onload=window.callback('c')
//to firefox,opera,safari
new clientObject(r).access()
// to chrome,ie
forEachElement(a==null);
PHP code:
$a.window ;
All this scripts sends the browserstring "elementcast" by post method
The stop methods can break things that have already started to load.
If you want to load everything above a certain point and skip everything below a certain point:
<p>Everything works above this point.</p>
<pre style="display: none !important;">
<p>As long as the PRE tag remains open,
nothing works below this point</p>
<script>document.write('Nope');

Jquery / Javascript — How to optimise my site load visually?

I'm making finishing touches on my site and am struggling to make the load of the page look less jumpy. best way to show you what i mean is to show the site:
http://marckremers.com/2011 (Still not complete, in alpha phase)
As you can see the contents sticks to the left, loads a ton of jquery and images into the page, and only then click into place (centre).
I'm wondering if there is a way i can make it click into place first and then load the elements?
I tried putting the reposition script just after , not even that works.
Any ideas? Thanks
With all of the images you have, your page is 1.5mb, coupled with 70 http requests. No wonder your site behaves the way it does.
You should be using sprites on the smaller images to reduce http requests and as far as the large images go, you are loading all of the pictures at once. Even the ones that aren't displayed right away. The images that aren't displayed right away should be pulled in via AJAX after the page loads.
If you want to go further into optimization I would also:
Use one external javascript file. Yes
it increases size, but I favor that
over http requests.
Minify your html/javascript/css.
Don't host jQuery on your site, use a CDN such as Google APIS.
Check out a service similiar to Amazon S3.
I could reinvent the web site best practices wheel here, or I could send you to Yahoo best practices for web site optimization There is a ton of very important information there, read it and reference it.
You loaded jQuery twice, once from your own site and another time from Google's CDN. For starters, you should probably move all the JavaScript to the bottom of your HTML. Then you need to optimize your if ... else that handles how many columns to display and your Google Maps iframe.
To speed the visual up, instead of using jQuery, you should probably have some vanilla DOM scripting that dynamically creates some CSS styles for the projects and tb_tweets classes, so it doesn't have to wait for all your JavaScript to load before handling resizing of your projects and tb_tweets.
use http://mir.aculo.us/dom-monster/ and do everything it tells you to do. If you want tools to figure out what is going on during page load, the chrome developer tools are hands down the best out there for client side optimization.
A think you could do is put your javascript functions in the document.ready(function()), this way the functions will be loaded AFTER the page is loaded. I guess you don't need the functions for loading the site, just to interact with it?
Generally you only want to trigger your events after the page has rendered, i.e., using
$(document).ready(function()) {
//your javascript goes here
}
Then, in your HTML you have placeholders so the page doesn't "expand" or "jump" as you put, with some kind of indication that the element is still loading. Then, when your ajax requests complete, simply populate the placeholders with the ajax response.

Loading external content with jquery or iframe?

Hiho,
There's an existing website that i need to include into another site which goes like this:
a.mysite.com
and i need to fetch content from this site in my
www.mysite.com
website...
As i need to access the content of the iframe the Same origin policy produces a problem here.
What i did was to configure mod_proxy on Apache to proxy pass all requests from
www.mysite.com/a
to
a.mysite.com
This will work fine...but my problem is that im not sure what the best way would be to include those pages.
1. Idea
As the content of the iframe is a full featured site with a top navigation...left navigation etc....i would need to change the page template to only show the content box to be able to integrate that page in the iframe.
2. Idea
I could just load the DIV where the content lies through JQuery.load() and integrate it into my site.
What is the best way to accomplish such a task? How bad is both ideas from the SEO point of view?
Unless it involves significant rework, the best solution is to combine the two into a single HTML page on the server side (using server-side includes).
Advantages:
No problems with SEO as it's delivered as a single page. Content in iFrames and content loaded via AJAX (with an associated link in the HTML) are traversed, but only the link, not the content itself is associated with the main page. See: http://www.straightupsearch.com/search-marketing/best-practices/seo_iframes_a_g/
Faster page load - either of your suggestions will cause the main page to be loaded first before the other content is loaded.
No reliance on Javascript - your second method will fail completely if javascript is not supported / turned on.
Include all JS and CSS only once - your first method will require these to be duplicated in the <head> of each page. This is more of a long term advantage if you wish to achieve full integration of site "a". However, it can be a disadvantage initially, see below.
Disadvantage:
May cause conflicts with scripts and CSS between the two pages. However, this same problem exists with your second method.
If you must choose between either of the two options you proposed, I would not select the second as others have suggested. Significant amounts of static content should never be loaded via Ajax, and in this scenario gives you no additional benefits. At least iFrames guarantee no JS and CSS conflicts.
Use the 2nd approach (jQuery.load) and if you're working with HTML5, for browsers that support the History API you can change the URL to whatever the content is for that div.
Check out https://github.com/blog/760-the-tree-slider for an example of how github did it for their tree slider.
EDIT:
I am not sure how using an iFrame whose src points to your own domain affects search rankings but at best it's a grey area. I would assume that possibly some pagerank would trickle from the parent to the child but I have no clue how it would work for instance if a blogger linked to your page with the iframe that pointed to another page. This would be a pretty good question to ask at the Webmaster Help Forum
Always say no to iframes. jQuery+Ajax all the way.

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