Are there any libraries or examples how to create pie style progress bars with CSS3?
Canvas or SVG would be a better fit than CSS for this. (Due to lack of circle segments). Raphaël might be a good choice if you go for SVG. Here's a (non-animated) pie chart, which will show you how to draw segments.
another great choice for SVG based graphs is d3.js. It is the successor to the Protovis library, but is much more flexible and much better written (and thus better preforming). Also, you can style some properties of SVG elements with CSS3, but not as much as you can style HTML. However, CSS is still useful, and you can still, for example, use transitions on some properties. Take a look at the W3C's Styling SVG document (although be aware that it just discusses CSS2).
Pie chart is possible in pure css but animating it may not be easy.
Related
I want to make a background animated gradient like this ones protoyped on Figma.
Picture of Animated Gradient
I saw some solutions of animated gradients in CSS like the one of this page, but it only generates a common linear-gradient and changes the background position.
What i'm looking for is a mesh gradient like the Figma examples (is builted with shapes, a blur layer and some noise) and animate it like the Figma prototype.
It can be done with pure CSS? or what could be a nice solution?
You'd definitely need something alongside CSS to animate it like you desire, JS would be a good bet. This is really a project in itself, but take a look at What a Mesh. It does what you're looking for, I don't think it's actually available for public/commercial use, but you might get some inspiration for how to approach it.
https://whatamesh.vercel.app/
If creating a web graphic that's meant to be used in many places and overlaid on top of other elements, is it possible for the graphic to composite with whatever's beneath it -- like setting a Photoshop layer to be "Difference" -- such that its colors invert?
Specifically, picture a "Left" and "Right" image arrow that could be placed on top of an image carousel. Many images could appear beneath it and, if the arrows are lightly colored on a lightly colored image, they may be difficult to see. As such, an image whose color is the difference of what's behind it would turn dark on a light background.
I'm picturing doing this with an SVG, potentially, but if it could be accomplished with a png or other bitmap of sorts, that'd be neat too.
If you're on bleeding edge browsers you have the option of using CSS blend modes, see this tutorial.
For more details, see the specification, which covers html, svg and css.
yes it can, but the support is really poor if you want a CSS only solution. You had the inverse filter on IE versions and now you have Webkit support, but that's about it. However, you can use JQuery Invert plugin by Paul Irish. It does exactly what you want, and obviously has better support than CSS
I'm a newbie in html5/CSS3/jquery, and I'm making this (not finished yet):
http://catherinearnould.sio4.net/autres/kat/
The problem is that, because of the large canvas with particles, the animations are not as fluid as it could.
So if you're bored, don't hesitate to have a look at my code and give me some advice to improve the fluidity ^^
Many thanks!
For one using RequestAnimationFrame() instead of setTimeout() is likely to make things smoother. See Paul Irish his blog post requestAnimationFrame for smart animating.
The big performance hits are most likely caused by live calculated/rendered CSS attributes such as transparency, shadows and rounded corners.
Also be aware of that changes to DOM elements which cause reflow is costly (such as animations), see http://code.google.com/speed/articles/reflow.html.
I see a big difference just after running this:
$('*').css({backgroundColor:'transparent', opacity:1, boxShadow:'none'});
If you can, replace all (semi-)transparent and rounded graphics with equivalent png images.
You could also think of using css3 transition for some of your animation and removing and adding new classes to the elements to changes their styles rather than doing it with javascript(jQuery). Use jQuery as a fallback for older-browsers and IE.
http://www.w3.org/TR/css3-transitions/
http://net.tutsplus.com/tutorials/html-css-techniques/css-fundametals-css-3-transitions/
This gives the browser the power to do the rendering, and in some cases like in the iOS you can get hardware accelerated for the rendering.
For the canvas element, I have little experience with that, but I'm interested in that effect you're creating. But I think the massive canvas animation at the start is a bit much, there is so much going on already, maybe there is no need for that effect? Just my opinion as a user.
I'm developing a web application that has a certain layout.
I'm mainly using CSS for styling the buttons and using divs and styling them for other layout items.
The problem is that sometimes I need a layout item to be non-rectangular.
Also- designing SVG is easeer and sometimes may produce better results.
My question is: should I use CSS always for the layout, and for instance- combine divs to achieve the non-rectangular effect- or should I use SVG for some of the layout items?
Also- what about the buttons- CSS or SVG?
Thanks!
Bear in mind that SVG isn't supported in older browsers. In particular, in IE8 and earlier. Using SVG will therefore limit your audience.
It is possible to rig older versions of IE to support SVG - there are a number of Javascript libraries which can convert SVG into VML, which was Microsoft's proprietary alternative to SVG. However, this does mean you're running Javascript code unnecessarily; you could cause performance issues in IE, or worse, it could load slow enough that the layout redraws after its loaded.
Therefore, for cross-browser compatiblity reasons, I would suggest not using SVG for your basic page layout.
Where I would use SVG is for graphs and charts, etc. For these, I would use the Raphael javascript library, which makes drawing SVG very easy, and also renders it as VML in IE, without you having to do any explicit conversion.
For creating non-square elements in CSS, there is a hack which uses the CSS borders to draw triangles and other shapes. This works in all browsers (with some minor caveats in IE6), so is great for creating spot-effects like marker arrows and speech bubbles.
See http://jonrohan.me/guide/css/creating-triangles-in-css/ for more info on this.
Great for spot effects, but should stress that I wouldn't recommend it for complex shapes; I have seen some people drawing entire pictures using it -- see http://www.cssplay.co.uk/menu/fivestar and other hacks on the same site -- but as I say, I wouldn't suggest actually doing this, except just to demo a hack like this guy.
Hope that helps.
[EDIT]
Per the OP's comments, he only wants to add a rectangular protruding part to a larger rectangular <div>, so in fact the shape he's trying to create isn't all that complex after all; in fact, it sounds a lot like a tab. Given this, the best recommendation by far is to forget about drawing it with SVG, and simply create two divs: one for the main content and one for the tab. If necessary, a third div can be created to wrap the other two. This may be helpful for referencing the two others together via CSS or Javascript.
I tend to advise you not using SVG for the layout, it's not really its purpose. It's best suited for diagrams, pictograms, charts or maps etc.
using SVG will have disavantages:
-First, support: IE<9 doesnt support SVG, or you'd need an external plugin.
-Integration: it's easy to have SVG inside HTML, but emmbeding HTML in SVG is quite unpractical.
-flow in layout: you can draw shapes easily, but placing blocks/text has to be done manually. in html two consecutive blocks will be displayed one below the second. In SVG you have to place them absolutely, ensure text inside them isn't too long cause their size won't adjust automatically.
I'm almost sure it would be easier to layout with HTML+CSS. And now with CSS3 you can rotate blocks, round borders, cast shadow. I would like to know which particular layout cause you problems.
We are in 2017 now, I belive that all major browsers support SVG.
So I would say SVG is a good option. You will probably need to use JavaScript to adjust elements on the screen and make them responsive, because SVG does not provide things such as flexbox, tables, float, etc. The advantage with that is that you will have more flexibility and will not have to deal with the limitations and side effects of CSS.
What's the best, most robust CSS-button definition?
Ideally, I'd like gradients, rounded images, and graceful degradation down to IE8. It would also be great if the buttons didn't use any images, and the buttons scaled horizontally to fit their content.
What's the best solution to this?
Use the tools at http://css-tricks.com/examples/ButtonMaker
It is possible to use gradients, box-shadow, border-radius, rgba colour et cetera in older versions of Internet Explorer, using CSS3 PIE. Look at their demo with all these CSS3 properties.
Now, combine CSS3 PIE with the button maker mentioned in the comments and you're done!
Huge fan of JQuery UI buttons. Demo is here
Yes, they do use some images...but the images are also common to the many other features of JQuery UI, which offers your page some amazing features (and more coming all the time) It does gracefully degrade, and you can extend it to round in IE via another JQuery plugin. My favorite part is ThemeRoller, which allows you to build a page using themeroller capable plugins, then style or change at will, even with a tool that floats over the site. You could easily include a way for your user to switch the entire theme of the site with a button click. Plus, there's an editor to easily make your own themes if you don't like what's there.
As for gradients, you have fade up, fade down, curved fade, patterns, and then "build your own" options with variations of those and more plus color overlays and opacities.
Setting up a button is as easy as: <button class="ui-state-default ui-corner-all" type="submit">Button</button>
There is no way to do what you're asking with CSS only, as gradients and corners were only added as of CSS3 and even now they are still not fully supported.
The best way to achieve gradients now is to use an actual image, you can then be assured that most if not all browsers will support it (if you're using a .png image, IE6 may have an issue with it but there are CSS hacks to get around it).
Rounded corners can be added to the site in two different ways:
The first is via images and you would place these at the corners of the element giving the rounded appearance. What I've said before about .png images still applies here.
The second method is to use JavaScript. Most frameworks will have plugins designed with Web 2.0 features in mind. I recommend jQuery as it's easy to implement.
Out of the above two methods the first one is preferred if you want to make absolutely sure that the users can see curves, however if you aren't too concerned about them having JavaScript disabled I would definitely use jQuery as it's 100 times easier to use.