So, I need to implement mathjax in a web project, Did some research on who is already using it and found that,
https://math.stackexchange.com/ Uses mathjax to render mathematical equations and formulas. But when it gets rendered on the browser it is slow and a lag is present. How could this be removed or reduced more then what is happening right now.
MathJax is a very good renderer but isn't always the fastest. An alternative javascript math rendering library is jqmath That is noticably smaller and quicker than MathJax, but doesn't aim for all the same spacing refinements and the same coverage of latex math input.
The fastest rendering of course is just to use MathML in the page and require a browser that supports it. Current versions of Opera, Safari, Firefox and Chrome all support that to some extent. (For IE people need the free (not open source) MathPlayer plugin). My own html5mathml JavaScript sometimes helps to smooth the gaps between the different browser implementations.
Related
How do I get the timings and layouts of different frames generated while painting an HTML page which involves javascript manipulations and CSS3 animations by a webkit browser?
You can get the page layout by dumpRenderTree() provided by webkit, if that's what you wanted. Regarding the timing data, as far as I know you may need to build the webkit engine to enable it then you can get the timing data regarding rendering, network, Javascript, etc. - at least this is feasible for Android webkit.
Im having a problem with Raphael and a custom map svg plugin Im using. I am pretty sure the problem is related to Raphael and redrawing vectors every time the map reloads. The map works perfectly in Firefox/Chrome/IE9. In IE 7/8 the map runs incredibly slow and its almost non usable. The icons also turn white sometimes. It seems the positioning happens before the re-sizing of the elements happens in IE8 and that's where the bottleneck seems to occur. Here is a link to the map:
http://www.comparewebads.com/VisaInteractiveMAP/world.html
The file that handles the map functionality is mapsvg.js.
http://www.comparewebads.com/VisaInteractiveMAP/js/mapsvg.js
I know this isn't a comprehensive answer, but some of my own research in a related area tells me that browsers' javascript performance, especially in terms of graphics performance in svg, canvas, etc, has improved exponentially over their past few versions. IE is especially notorious for poor performance (in any version).
I suspect that at least a part of your problem is simply that IE 7 and 8 have comparatively slow and inefficient javascript engines.
In my own javascript-heavy projects I refuse to support anything before IE9, because IE 7 and IE8 simply can't handle the performance (and some features just aren't included.)
So I'm nearly finished with the website I had to make for my school's prom. Now, I just checked it in Internet Explorer and, well, it's hopeless. Elements aren't where they're supposed to be, most of the JavaScript/jQuery doesn't work at all. I am clueless where to start to make my site compatible with Internet Explorer. Whats the best way to make your site compatible with IE?
The main cross browser step is DOCTYPE Declaration. It is an instruction to the web browser about what version of HTML the page is written in.
It's going to be murder to fix what's already broken... you really needed to start off on the right foot, as it is you may need to re-write large chunks of your site in order to get things working again.
Going back? Well the easiest thing is going to be to start a fresh layout (using the following pointers) and then move your site into the new framework. Depending on the scale of your site this is no small task. Your alternative is one-by-one code debugging, with maybe firebug light
Going forward, how do you build a site that works more evenly across the board?
1 Use a reset CSS boilerplate
I like the html5 one at http://html5reset.org/. These apply layers of CSS to get each browser looking the same to start with (your CSS then gives it the style you want). Note they DON'T address the variety of ways browsers calculate things - borders being part of the width or not (firefox/ie difference)
2 Use a JS library
Or write your own, but be aware of all the differences between the browsers don't just code for the one you're using. Build some JS tests for the library that you can run in any browser to make sure that the library performs as expected, then deal with any site oddities after that. There's too many JS libraries to make a recommend but Prototype.js and jQuery are a popular two.
well it's known that there are differences between browsers. The way browsers render CSS code is also different. You should check parts and see how or if it works as you want. :) There is no one-to-all solution. The experience will let you know what works and what not. But to start you could isolate what is not working in IE (javascript code) and then see what alternatives you have. As for the appearance, there is the option of having separate CSS files especially for IE. However, often there is a technique(a different way to implement the same appearance) that lets you create the appearance you want without multiple versions of code.
I am using toDataURL() method of a canvas object. It works on IE9 and Chrome.
But it is not supporting for IE7 and IE8. I found this link
https://github.com/sampula/SVG.toDataURL/commit/9b59af148b7f14d41974cf318eed6f84c8c91062
It extends SVG to use toDataURL(). But in its implementation, it again uses canvas.toDataURL(). I am using Google's API (jquery.flot.js) for plotting all the graphs graphs. But it also uses canvas to plot the graph. So, SVG is not an option.
I there ever a way to use canvas.toDataURL() or something similar for IE7 and IE8.
Thanks in advance
IE7/8 does not support either Canvas or SVG.
It does however support VML, which is a vector language similar to SVG, and there are a number of javascript-based hacks for IE that use its VML functionality to emulate both Canvas and SVG in this older browser.
The most well known IE-Canvas hack is this one: http://code.google.com/p/explorercanvas/
I haven't spent much time with it myself, so I can't vouch for whether it can do specific functionality such as the toDataURL() method you're asking about, but if you can't do it with this, then it's unlikely to be possible at all.
I mentioned that there are similar tools for VML->SVG as well. If that's of interest to you, then you might want to look into this one: http://code.google.com/p/svg2vml/
Bear in mind that no matter how clever these hacks are, there is always a fundamental issue of performance. IE7/8's javascript interpreter is very slow by modern standards, and these are javascript-based tools trying to shoehorn very modern functionality into this old browser. They may well work, but don't try to do anything too clever with your canvas or SVG, or you'll kill the browser.
Finally, since you mentioned that you're using all this to draw graphs, I will point out the graphing module of the Raphael library. Raphael is a library which draws SVG graphics on all browsers (falling back to VML for IE). The graphing module provides all the usual graph types, wrapped in an extremely easy-to-use javascript API. And it is fully cross-browser compatible -- it works on all desktop browsers out of the box from the latest Chrome and Firefox all the way back to IE6. If you're struggling with cross-browser compatibility with the tools you're using now, you may want to switch to this library.
Hope that helps.
I have recently created an application in which I had to use toDataURL() but I was not able to find any way to do this in IE7/8. My application was an online image editor in which user was able to save the canvas contents. I believe there is not way we can use this method in IE7/8.
I am using Large fonts in my website at a few places and they don't appear anti-aliased or smooth... I was wondering if their is any way to show large anti-aliased fonts for browsers on windows OS which has anti-aliasing switched off as default... Similar to something they have on this website here
You can't control system anti-alias in CSS.
For that, you would have to use Flash text replacement, like sIFR (they are using h2swf)
If the user's OS or browser does not have anti-alias switched on, there's nothing you can do to force either to use it. You can use other rendering platforms like Flash, or using CCS to replace text with images, to allow fonts to be displayed with anti-aliasing, but it does seem like a kludge for something as simple as rendering text. Technologies like Flash will also alienate certain audiences, either whose devices have no support for them or they simply opt out of using them.
If your user does not have AA enabled, arguably they are displaying a preference or simply don't care about the particulars of how the font is rendered. At the end of the day, you simply cannot directly control the client your users will use to consume your website. On the web you will always be at the mercy of the client application. The best you can do is present it clearly and in such a way that it should be easy for users to get the best experience they can achieve with their client.
Don't lose any sleep over whether your pixels are slightly less pretty on one client.
Cufon is an alternative to sIFR. See comparison here:
http://net.tutsplus.com/tutorials/html-css-techniques/six-ways-to-improve-your-web-typography/
Good news : in IE9 (released 3/14/11) they seem to put much larger text as anti aliased by default. I have hardware acceleration disabled - so it probably has this effect for all users.
Warning: this is an exercise in futility but....
I did notice that the text-shadow css property seems to force anti aliasing in some browsers. Unfortunately I think only Chrome at this time...
Here's a sample...
(each heading is shown first normally - and then with a text shadow).
Best viewed in Chrome!