I am experiencing two weird things happening with svg rendered in safari (works fine in Chrome/Edge/FF and heck even IE)
Lines not defined in SVG will appear and disappear randomly when panning around.
Lines defined in SVG might disappear randomly when panning around.
Not really that easy to describe so I made a video for it
https://youtu.be/BqlItab0k_g
I did not use any fancy SVG feature like script or media query. The only elements used are text/path/rectangle.
The SVG is generated by me and optimized using SVGO
[Codepen](https://codepen.io/alt22247/pen/vwzBmL)
The svg is base64 encoded since I can't upload svg to code pen. Had to use code pen instead of SO built in since the base64 encoded img text exceed SO limit. Feel free to decode it back to text.
I can't think of any way to mess up the SVG without causing a parse error so I believe this is a Safari bug. But we need to support Safari regardless (typical life of a web dev).
So the question is: What is causing this and is there any work around I can do rather than wait for Apple to fix it 10 years later?
I am really stressed out with this, i have built an entire designer with Fabricjs, gone through some right hoops with the text to make it work how it's needed. The problem is now when the data from the canvas is sent to the server for a full resolution render with NodeJs (fabricjs in node) the fonts are coming out looking different to they do in the browser.
All the fonts are installed on the server, and the correct font does render, it just seems to have different spacing between the characters even though the fabric version is the same and all the extension code is the same on browser and server side, all the TTF fonts are the same etc etc
Here is the browser version:
And here is the node js version:
As you can see the font is correct on the node one compared to the browser one, but it's being rendered slightly differently.
Is there a solution anyone knows of to fix this?
I don't believe that there is any way to solve this problem when using fabric.js
Text in fabric.js can be scaled arbitrarily, but then it is rasterized and displayed as a canvas object like any other image.
You can see in the fabric.js demos that the text will stretch like an image until your input is complete, then it re-renders to a new image at that scale.
Knowing that this is how fabric.js handles text, it is possible to select two scales that produce quite different results:
In the image above you can see that the two fonts are pretty much the same size, but the one on the right (slightly larger) has been rasterized such that it appears to have a bolder appearance. It's the best example I could reproduce with limited time.
This is why rendering the fabric.js objects in your browser at a smaller resolution than the server will lead to the font appearing slightly different.
If you try rendering the browser version at the same size as the server you are likely going to get the same results.
I'll try to be as clear as possibile (i'm not very good in english). I have a d3 static force graph and I need it to be cross browser. I already had a big problem with Internet Explorer, because it doesn't support SVG correctly. And i solved it by drawing elliptic arc without markers as suggested in another topic.
Now i have the following problem:
In every browser tested (Chrome, IE, Opera and Safari so far) my graph is shown correctly, in other words links length starts and stop exactly in the x,y coordinate of source and target node), while in firefox, using same data, every link go beyond the node x,y coordinate.
With Chrome i get this result
With Firefox i get this result
The code i'm using is the same for both browser, if you need it i can try to make a JSfiddle working.
I am building a website with a TON of png-24 files that have transparent background. In IE 6 they obviously aren't displayed correctly, so I need some sort of reliable, good solution that will fix the PNG problem in IE and require little work and be reliable. Any good ideas?
For IE6 transparency I follow a personal flow:
1. If there is just one or two PNG images (like a logo, or a normal image) I just use filter:
#selector {background:none; filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='test.png', sizingMethod='crop');}
Problems: If applied to a link, it will no longer be clickable. Possibly apply to the h1#logo and have the a be transparent.
2. If I have a lot of 24-bit PNG files, or special use cases (repeating background, etc), I use DD_belatedPNG
IMPORTANT FOR IE7 + IE8: You cannot animate or combine the filter:alpha (which is used for overall opacity on an element in IE and also used by jQuery to set opacity) property with 24-bit transparent PNG images. It changes it to look like 8-bit transparency, with everything that is not 100% opaque or transparent taking on a black background.
Here are a few good png fixes for ie6:
http://labs.unitinteractive.com/unitpngfix.php
http://www.twinhelix.com/css/iepngfix/
There are a lot IE PNG fixes on the net, which basically all work with the same technique. The older Internet Explorers do not support alpha in PNGs directly, but they all have a filter that does so. So writing the following code as part of a css of an object puts the image in the src to the background of the element:
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png');
That way, you can easily display transparency in the Internet Explorer. However it's a lot easier to just get one of the png fix scripts (in JavaScript) and include it to your page inside of conditional comments. Then the script will make all your images working automatically.
We used Dean Edwards' IE7 for this. (So named before IE7 came out.) It's been good for that kind of thing.
There are currently many options to get this working. The standard is apply a DirectX filter through CSS to change make the PNG transparent in IE6. There are even scripts that will automatically do this when the webpage loads from an IE6 or less client.
http://www.google.com/search?btnG=1&pws=0&q=transparent+png+ie6
Our (beloved) designer keeps creating PNG files with transparent backgrounds for use in our applications. I'd like to make sure that this feature of the PNG works in "older" browsers as well. What's the best solution?
edits below
#mabwi & #syd - Whether or not I agree about the use of a PNG is not the point. This is a problem that I need to solve!
#Tim Sullivan - IE7.js looks pretty cool, but I don't think I want to introduce all of the other changes an application. I'd like a solution that fixes the PNG issue exclusively. Thanks for the link.
IE PNG Fix 2.0 which supports background-position and -repeat!
Also paletted 8-bit PNG with full alpha transparency exist, contrary to what Photoshop and GIMP may make you believe, and they degrade better in IE6 – it just cuts down transparency to 1-bit. Use pngquant to generate such files from 24-bit PNGs.
I've found what looks to be a very good solution here: Unit Interactive -> Labs -> Unit PNG Fix
update Unit PNG is also featured on a list of PNG fix options on NETTUTS
Here are the highlights from their website:
Very compact javascript: Under 1kb!
Fixes some interactivity problems caused by IE’s filter
attribute.
Works on img objects and background-image attributes.
Runs automatically. You don’t have to define classes or call
functions.
Allows for auto width and auto height elements.
Super simple to deploy.
IE7.js will provide support for PNGs (including transparency) in IE6.
I've messed with trying to make a site with .pngs and it just isn't worth it. The site becomes slow, and you use hacks that don't work 100%. Here's a good article on some options, but my advice is to find a way to make gifs work until you don't have to support IE6. Or just give IE6 a degraded experience.
Using PNGs in IE6 is hardly any more difficult than any other browser. You can support all of it in your CSS without Javascript. I've seen this hack shown before...
div.theImage {
background : url(smile.png) top left no-repeat;
height : 100px;
width : 100px;
}
* html div.theImage {
background : none;
progid:DXImageTransform.Microsoft.AlphaImageLoader(src="layout/smile.png", sizingMethod="scale");
}
I'm not so sure this is valid CSS, but depending on the site, it may not matter so much.
(it's worth noting that the URL for the first image is based on the directory of the stylesheet, where the second is based on the directory of the page being viewed - thus why they do not match)
#Hboss
that's all fine and dandy if you know exactly all the files (and the dimensions of each) that you're going to be displaying - it'd be a royal pain to maintain that CSS file, but I suppose it'd be possible. When you want to start using transparent PNGs for some very common purposes: a) incidental graphics such as icons (perhaps of differing size) which work on any background, and b) repeating backgrounds; then you're screwed. Every workaround I've tried has hit a stumbling block at some point (can't select text when the background is transparent, sometimes the images are displayed at wacky sizes, etc etc), and I've found that for maximum reliability I'll have to revert to gifs.
My advice is to give the PNG transparency hack a shot, but at the same time realise that it's definitely not perfect - and just remember, you're bending over backwards for users of a browser which is over 7 years old. What I do these days is give IE6 users a popup on their first visit to the site, with a friendly reminder that their browser is outdated and doesn't offer the features required by modern websites, and, though we'll try our best to give you the best, you'll get a better experience from our site and the internet as a whole if you BLOODY WELL UPGRADED.
I believe all browsers support PNG-8. Its not alpha blended, but it does have transparent backgrounds.
I might be mistaken, but I'm pretty sure IE6 and less just don't do transparency with PNG files.
You sort of are, and you sort of aren't.
IE6 has no support natively for them.
However, IE has support for crazy custom javascript/css and COM objects (which is how they originally implemented XmlHttpRequest)
All of these hacks basically do this:
Find all the png images
Use a directx image filter to load them and produce a transparent image in some kind of format IE understands
Replace the images with the filtered copy.
One thing to think about is Email clients. You often want PNG-24 transparency but in Outlook 2003 with a machine using IE6. Email clients won't allow CSS or JS tricks.
Here is a good way to handle that.
http://commadot.com/png-8-that-acts-like-png-24-without-fireworks/
If you export your images as PNG-8 from Fireworks then they'll act the same as gif images. So they won't look shitty and grey, transparency will be transparency but they won't have the full 24 bit loveliness that other browsers do.
Might not totally solve your problem but at least you can get part way there just be re-exporting them.
I might be mistaken, but I'm pretty sure IE6 and less just don't do transparency with PNG files.
I have two "solutions" that I use. Either create GIF files with transparency and use those everywhere, or just use them for IE 6 and older with conditional style sheets. The second really only works if you are using them as backgrounds, etc.