Snap.load() external SVG fails to Load - javascript

PROBLEM:
I'm using Snap.svg to create some basic interactive graphics, but for some reason I can't get my external SVG file to load using Snap.load(). I've pulled code straight from the tutorial at snap.io and checked and double-checked the docs. My SVG file renders in the browser fine, it just doesn't display inside the Snap SVG. Other shapes (i.e. not pulled in using Snap.load() ) do display.
CODE:
I've boiled my example down to the most simple HTML and SVG files imaginable, and the Snap.load() method still isn't working for me. Does anyone see what I'm missing?
HTML:
<head>
<style media="screen">
#svg {
width: 300px;
height: 300px;
}
</style>
<script src="snap.svg-min.js"></script>
<meta charset=utf-8 />
</head>
<body>
<svg id="svg"></svg>
<script type="text/javascript">
var s = Snap("#svg");
Snap.load("svgtest.svg");
</script>
</body>
SVG (originally exported from Illustrator):
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="100px" height="100px" viewBox="0 0 100 100" enable-background="new 0 0 100 100" xml:space="preserve">
<rect x="14" y="33" fill="#2BB673" width="70" height="30"/>
</svg>
UPDATE:
Updated the code as per #Ian's suggestion -
var s = Snap("#svg");
Snap.load("http://www.w3.org/TR/SVG/images/struct/Use01.svg", onSVGLoaded ) ;
function onSVGLoaded( data ){
s.append( data );
}
- but still no display of external SVG. I tried using an SVG from w3.org just to be sure it wan't a problem with the file itself or my domain.


The load function takes a callback, as loading can take some time. So I think you would do something like the following...
var s = Snap("#svg");
Snap.load("svgtest.svg", onSVGLoaded ) ;
function onSVGLoaded( data ){
s.append( data );
}
Edit: There may be some access control issues if not accessing from the same server as the script, check the console log for any errors.


I was having exactly this problem in Internet Explorer only, and it turned out to be because the SVG file I was loading in was a minified one from which the doctype had been removed. Other browsers were ok without the doctype, but leaving the doctype in fixed the problem in IE as well:
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
In case, like me, you're using Grunt to minify SVGs, you can leave the doctype in by adding the following option to your Gruntfile:
svgmin: {
options: {
plugins: [
{ removeDoctype: false }
]
}
// etc...
}


There is a small bug in the distribution - see https://github.com/adobe-webplatform/Snap.svg/issues/196. The suggested fix works correctly. The online demo works because it is referencing a much older build of the library.


With version 0.5.1 installed. The code in the correct answer above needs to be re-written as follows to work:
var s = Snap();
Snap.load("svgtest.svg", onSVGLoaded ) ;
function onSVGLoaded( data ){
s.append( data );
}

Related

I need help understanding how to get s stringified (variable) version of an SVG image

I am currently working with an svg image that I need help stringifying, If that makes sense. Basically how to make the image open in a text/code editor as only variables?
Here is an example of what I am looking for:
var svgData='PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1MTIiIGhlaWdodD0iNTEyIiB2ZXJzaW9uPSIxLjEiPjxkZWZzPjxsaW5lYXJHcmFkaWVudCBpZD0ic3Ryb2tl
Currently when open an svg image in a text editor I just get something like this.
<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 22.0.1, SVG Export Plug-In . SVG
Version: 6.00 Build 0) -->
<svg version="1.1" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="0 0 255.1 227.3" style="enable-background:new 0 0 255.1
227.3;" xml:space="preserve">
<style type="text/css">
Any help is welcome! Thank You.

It looks like svgData is cut a little short. But if I understand your question right, you want that encoded svgData available in a textarea?
You can use the native functions btoa and atob (https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding) to encode and decode the svg content.
For example using your svgData value: atob("PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1MTIiIGhlaWdodD0iNTEyIiB2ZXJzaW9uPSIxLjEiPjxkZWZzPjxsaW5lYXJHcmFkaWVudCBpZD0ic3Ryb2tl") = <svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" version="1.1"><defs><linearGradient id="stroke"
and we can convert it back with:
btoa('<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" version="1.1"><defs><linearGradient id="stroke"') = "PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1MTIiIGhlaWdodD0iNTEyIiB2ZXJzaW9uPSIxLjEiPjxkZWZzPjxsaW5lYXJHcmFkaWVudCBpZD0ic3Ryb2tlIg=="

SVG Marker gets rendered differently on different screens

Update:
I figured out the screen issue. device pixel ratio is the culprit. On devices with lower window.devicePixelRatio the icon gets displayed smaller, a solution is to make the size of the icon conditional on window.devicePixelRatio, i.e. :
scaledSize: highDevicePixelRatio ? new google.maps.Size(40, 60) : new google.maps.Size(60, 90)
resolution might also play a role, but I couldn't test that as of now.
The issue with Internet Explorer 11 still exists though.
** End Update **
So this is really absurd and I am somewhat still baffled. I noticed this extremely inconsistent behavior of my custom markers. Drove me crazy, because I couldn't figure out why they would be behaving differently. I just now realized it depends on the screen I am displaying the map/marker on. I am using https://github.com/tomchentw/react-google-maps.
I am using a MacBookPro 2015 and a LG 34UC98-W hooked up via HDMI cable.
But not only the screen, also the used browser gives different results. It works somewhat fine on chrome (differences in screens), the marker don't show up at all in IE 11 (haven't tested FireFox).
Now this is how I currently instantiate my marker:
const marker = {
position: new google.maps.LatLng(this.state.center.lat,this.state.center.lng),
icon: {
url: icon_url(this.props.markerIcon,'purple'),
anchor: new google.maps.Point(13,42),
scaledSize: new google.maps.Size(40, 60)
},
draggable: false,
}
On my MacBook I get the following result:
On my LG I get the following result:
This is driving me NUTS, is there a way to achieve consistent behavior across screens/browsers? What is the reason for this???
Following the SVG Code:
I tried with and without the explicit width and height attributes in the first svg tag. Does not make a difference.
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- Generator: Adobe Illustrator 19.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="-291 377 28 40" width="28px" height="40px" style="enable-background:new -291 377 28 40;" xml:space="preserve">
<path id="pin" style="fill:#7261C3;stroke:#4B4080;stroke-width:0.6909;stroke-linejoin:round;stroke-miterlimit:10;" d="
M-277,416.286c9.188-11.902,13-17.688,13-25.75c0-7.188-5.062-12.823-13-12.823s-13,5.635-13,12.823
C-290,398.599-286.188,404.384-277,416.286z"/>
<g id="subject">
<path style="fill:#FFFFFF;" d="M-285.998,394.741c0.367,0.197,0.788-0.671,0.966-1.095c0.067-0.16,0.137-0.325,0.206-0.484
c0.354-0.812,0.713-1.485,1.1-2.059c0.451-0.67,0.933-1.2,1.473-1.618c0.477-0.37,1.017-0.658,1.603-0.857
c0.28-0.095,0.564-0.167,0.851-0.217c-0.172,0.361-0.319,0.733-0.437,1.11c-0.097,0.31-0.175,0.624-0.233,0.939
c0.208,0.046,0.407,0.131,0.582,0.253c0.072,0.062,0.144,0.125,0.216,0.187c0.122-0.854,0.404-1.684,0.812-2.444
c0.15-0.279,0.316-0.548,0.499-0.807c0.022-0.031,0.025-0.072,0.009-0.106c-0.016-0.034-0.05-0.057-0.088-0.06
c-0.137-0.009-0.275-0.014-0.413-0.014c-1.407,0-2.814,0.473-3.928,1.336c-1.309,1.013-2.173,2.495-2.834,4.012
C-285.864,393.397-286.442,394.479-285.998,394.741z"/>
<path style="fill:#FFFFFF;" d="M-267.856,399.462l-0.017-0.056c-0.031-0.104-0.104-0.191-0.2-0.24
c-0.097-0.049-0.209-0.057-0.312-0.021c-0.958,0.332-1.973,0.5-2.987,0.5c-0.685,0-1.37-0.077-2.037-0.233
c0.14,0.316,0.274,0.635,0.4,0.956c0.536,0.09,1.083,0.135,1.637,0.135c0.848,0,1.693-0.107,2.511-0.319
c0.254-0.066,0.504-0.141,0.75-0.226C-267.906,399.889-267.794,399.669-267.856,399.462z"/>
<path style="fill:#FFFFFF;" d="M-275.021,394.647c0.312-0.814,0.542-1.659,0.684-2.518c0.022-0.135,0.059-0.271,0.107-0.399
c0.159-0.423,0.284-0.862,0.373-1.304c0.083-0.414,0.134-0.834,0.154-1.256c0.544,0.229,1.111,0.434,1.697,0.611
c0.83,0.252,1.685,0.446,2.542,0.577c0.025,0.004,0.05,0.006,0.075,0.006c0.238,0,0.447-0.174,0.485-0.417
c0.041-0.268-0.143-0.518-0.411-0.559c-0.811-0.124-1.621-0.308-2.406-0.546c-0.777-0.235-1.521-0.522-2.212-0.851
c-0.374-0.178-0.752-0.378-1.117-0.571c-0.055-0.029-0.109-0.058-0.164-0.087l-0.138-0.073c-0.554-0.292-1.078-0.568-1.572-0.901
c-0.407-0.273-0.791-0.586-1.142-0.927c-0.194-0.189-0.505-0.185-0.694,0.01c-0.189,0.194-0.185,0.505,0.01,0.694
c0.393,0.383,0.824,0.732,1.279,1.038c0.459,0.309,0.942,0.573,1.417,0.825c-0.039,0.306-0.084,0.612-0.136,0.914
c-0.088,0.518-0.196,1.038-0.321,1.55c-0.267,0.019-0.533,0.046-0.797,0.08c-0.179,0.023-0.388,0.053-0.598,0.122
c-0.275,0.091-0.502,0.232-0.676,0.419c-0.225,0.243-0.328,0.533-0.404,0.745c-0.028,0.077-0.055,0.154-0.083,0.232
c-0.334-0.326-0.679-0.641-1.034-0.945c-0.238-0.166-0.527-0.257-0.817-0.259c-0.29-0.002-0.58,0.086-0.82,0.249
c-0.258,0.175-0.457,0.436-0.557,0.732c-0.1,0.295-0.101,0.623-0.003,0.919c0.955,2.143,2.443,4.046,4.293,5.489
c1.172,0.914,2.487,1.645,3.882,2.158c0.084,0.031,0.178,0.01,0.241-0.053c0.063-0.063,0.084-0.157,0.053-0.241
c-0.441-1.188-0.985-2.337-1.624-3.431c-0.26,0.242-0.603,0.508-0.997,0.685c-0.001-0.001-0.001-0.001-0.001-0.001
C-275.871,396.518-275.389,395.605-275.021,394.647z M-275.542,391.889c-0.128,0.791-0.338,1.569-0.625,2.318
c-0.107,0.28-0.225,0.555-0.354,0.826c-0.389-0.546-0.803-1.073-1.24-1.581c-0.082,0.171-0.182,0.333-0.3,0.482
c-0.162,0.207-0.356,0.389-0.572,0.538c0.003-0.007,0.006-0.015,0.008-0.022c0.263-0.732,0.53-1.476,0.792-2.21
c0.044-0.124,0.095-0.265,0.148-0.323c0.03-0.032,0.088-0.064,0.16-0.088c0.107-0.035,0.236-0.053,0.369-0.07
c0.342-0.044,0.689-0.074,1.035-0.092c0.129-0.006,0.259,0.014,0.379,0.062c0.046,0.018,0.091,0.035,0.136,0.052
C-275.56,391.798-275.534,391.843-275.542,391.889z"/>
<ellipse style="fill:#FFFFFF;" cx="-274.416" cy="385.286" rx="1.486" ry="1.739"/>
</g>
</svg>

I had a similar issue recently and had to change the meta tag in my html to work across devices. Seems like currently you don't have one so maybe try adding the following to your html:
<meta name="viewport" content="width=device-width, initial-scale=1.0,maximum-scale=1.0, user-scalable=0">
If you're only modifying the XML then you may have to use /> to close the tag or use the xml namespace as referenced in this post

SnapSVG browser incompatibility

How come this code works smoothly in chrome and not in firefox?
I use SnapSVG.
JS:
var pinguin = Snap("#pinguin");
Snap.load("pinguin.svg", bodyload ) ;
function bodyload( data ){
pinguin.append( data );
};
Html:
<svg id="pinguin" ></svg>
<script src="snap.svg.js"></script>
<script src="main.js"></script>
What I get on Chrome:
What I get on Firefox:
I tried to make a fiddle, but the fiddle doesn't work.
Instead, the code and display can be get here: http://www.pinguin.moe/
Do you know how can I fix the display on Firefox?

I think you need to add a width and height to your outer SVG. There is one in the svg file, but not in the markup on the main page. If you set this to 800,600 for example, it should work.
<svg id="pinguin" preserveaspectratio="xMinYMin meet" viewbox="0 0 300 750" width="800" height="600">

How to get hammer.js to work with svg files without using jquery?

I am trying to implement the hammer.js with svg files and without using any jquery. I'm trying to use the sample code from the hammer.js site {https://github.com/EightMedia/hammer.js/wiki/Getting-Started}. I have the external javascripts called like this.
<script src="javascript/hammer.js" type="text/javascript"></script>
My javascript is as follows:
<script type="text/javascript">
//<![CDATA[
var element = document.getElementById("testsvg");
var hammertime = Hammer(element).on('doubletap', function(event){
alert("doubletap!");
return false;
}
);
//]]>
</script>
My svg looks like the following.
<svg version="1.1" id="testsvg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="585px" height="230" viewBox="0 0 585 230" enable-background="new 0 0 585 230" xml:space="preserve">
<rect x="10" y="10" height="210" width="565" style="stroke:#006600; fill: #00cc00"/>
</svg>
Starting out, I'm just trying to get any detection to work. I do not get any alert when I double tap. I have also tried to implement this with the hammer.fakemultitouch.js plugin on my desktop. Neither the desktop or touch environment do anything.
Anyone have any idea what I might be doing wrongly?
Thanks,
--christopher

First make sure hammer.js is loading correctly. If it is, then you are most likely executing the javascript before the DOM is loaded. The easiest way to fix this is to place your <script> right before the closing </body> tag (near the bottom of your html file). You can also wrap your code in a load event function such as...
window.onload = function(){
var element = document.getElementById("testsvg");
var hammertime = Hammer(element).on('doubletap', function(event){
alert("doubletap!");
return false;
});
}

How to access SVG elements with Javascript

I'm messing around with SVG and I was hoping I could create SVG files in Illustrator and access elements with Javascript.
Here's the SVG file Illustrator kicks out (It also seems to add a load of junk to the beginning of the file that I've removed)
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="276.843px" height="233.242px" viewBox="0 0 276.843 233.242" enable-background="new 0 0 276.843 233.242"
xml:space="preserve">
<path id="delta" fill="#231F20" d="M34.074,86.094L0,185.354l44.444,38.519l80.741-0.74l29.63-25.186l-26.667-37.037
c0,0-34.815-5.926-37.778-6.667s-13.333-28.889-13.333-28.889l7.407-18.519l31.111-2.963l5.926-21.481l-12.593-38.519l-43.704-5.185
L34.074,86.094z"/>
<path id="cargo" fill="#DFB800" d="M68.148,32.761l43.704,4.445l14.815,42.963l-7.407,26.667l-33.333,2.963l-4.444,14.074
l54.074-1.481l22.222,36.296l25.926-3.704l25.926-54.074c0,0-19.259-47.408-21.481-47.408s-31.852-0.741-31.852-0.741
l-19.259-39.259L92.593,8.316L68.148,32.761z"/>
<polygon id="beta" fill="#35FF1F" points="86.722,128.316 134.593,124.613 158.296,163.872 190.889,155.724 214.593,100.909
194.593,52.02 227.186,49.057 246.444,92.02 238.297,140.909 216.074,172.761 197.556,188.316 179.778,169.798 164.963,174.983
163.481,197.946 156.815,197.946 134.593,159.428 94.593,151.279 "/>
<path class="monkey" id="alpha" fill="#FD00FF" d="M96.315,4.354l42.963,5.185l18.519,42.222l71.852-8.148l20.74,46.667l-5.926,52.593
l-24.444,34.074l-25.185,15.555l-14.074-19.259l-8.889,2.964l-1.481,22.222l-14.074,2.963l-25.186,22.963l-74.074,4.444
l101.481,4.444c0,0,96.297-17.777,109.63-71.852S282.24,53.983,250.389,20.65S96.315,4.354,96.315,4.354z"/>
</svg>
As you can probably see, each element has an ID, and I was hoping to be able to access individual elements with Javascript so I could change the Fill attribute and respond to events such as click.
The HTML is bog basic
<!DOCTYPE html>
<html>
<head>
<title>SVG Illustrator Test</title>
</head>
<body>
<object data="alpha.svg" type="image/svg+xml" id="alphasvg" width="100%" height="100%"></object>
</body>
</html>
I guess this is two questions really.
Is it possible to do it this way, as opposed to using something like Raphael or jQuery SVG.
If it is possible, what's the technique?
UPDATE
At the moment, I've resorted to using Illustrator to create the SVG file, and I'm using Raphaël JS to create paths and simply copying the point data from the SVG file and pasting it into path() function. Creating complex paths such as might be needed for a map, by coding the point data manually is (to my knowledge) prohibitively complex.

Is it possible to do it this way, as opposed to using something like Raphael or jQuery SVG?
Definitely.
If it is possible, what's the technique?
This annotated code snippet works:
<!DOCTYPE html>
<html>
<head>
<title>SVG Illustrator Test</title>
</head>
<body>
<object data="alpha.svg" type="image/svg+xml"
id="alphasvg" width="100%" height="100%"></object>
<script>
var a = document.getElementById("alphasvg");
// It's important to add an load event listener to the object,
// as it will load the svg doc asynchronously
a.addEventListener("load",function(){
// get the inner DOM of alpha.svg
var svgDoc = a.contentDocument;
// get the inner element by id
var delta = svgDoc.getElementById("delta");
// add behaviour
delta.addEventListener("mousedown",function(){
alert('hello world!')
}, false);
}, false);
</script>
</body>
</html>
Note that a limitation of this technique is that it is restricted by the same-origin policy, so alpha.svg must be hosted on the same domain as the .html file, otherwise the inner DOM of the object will be inaccessible.
Important thing to run this HTML, you need host HTML file to web server like IIS, Tomcat

In case you use jQuery you need to wait for $(window).load, because the embedded SVG document might not be yet loaded at $(document).ready
$(window).load(function () {
//alert("Document loaded, including graphics and embedded documents (like SVG)");
var a = document.getElementById("alphasvg");
//get the inner DOM of alpha.svg
var svgDoc = a.contentDocument;
//get the inner element by id
var delta = svgDoc.getElementById("delta");
delta.addEventListener("mousedown", function(){ alert('hello world!')}, false);
});

If you are using an <img> tag for the SVG, then you cannot manipulate its contents (as far as I know).
As the accepted answer shows, using <object> is an option.
I needed this recently and used gulp-inject during my gulp build to inject the contents of an SVG file directly into the HTML document as an <svg> element, which is then very easy to work with using CSS selectors and querySelector/getElementBy*.

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