html
<img src="logo.svg" alt="Logo" class="logo-img">
css
.logo-img path {
fill: #000;
}
The above svg loads and is natively fill: #fff but when I use the above css to try change it to black it doesn't change, this is my first time playing with SVG and I am not sure why it's not working.
You could set your SVG as a mask. That way setting a background-color would act as your fill color.
HTML
<div class="logo"></div>
CSS
.logo {
background-color: red;
-webkit-mask: url(logo.svg) no-repeat center;
mask: url(logo.svg) no-repeat center;
}
JSFiddle: https://jsfiddle.net/KuhlTime/2j8exgcb/
MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/mask
Please check whether your browser supports this feature:
https://caniuse.com/#search=mask
If your goal is just to change the color of the logo, and you don't necessarily NEED to use CSS, then don't use javascript or jquery as was suggested by some previous answers.
To precisely answer the original question, just:
Open your logo.svg in a text editor.
look for fill: #fff and replace it with fill: #000
For example, your logo.svg might look like this when opened in a text editor:
<svg fill="#000000" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg">
<path d="M0 0h24v24H0z" fill="none"/>
<path d="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z" fill="#fff"/>
</svg>
... just change the fill and save.
Try pure CSS:
.logo-img {
/* to black */
filter: invert(1);
/* or to blue */
filter: invert(0.5) sepia(1) saturate(5) hue-rotate(175deg);
}
more info in this article https://blog.union.io/code/2017/08/10/img-svg-fill/
If you want a dynamic color, do not want to use javascript and do not want an inline SVG, use a CSS variable. Works in Chrome, Firefox and Safari. edit: and Edge
<svg>
<use href="logo.svg" style="--color_fill: #000;"></use>
</svg>
In your SVG, replace any instances of style="fill: #000" with style="fill: var(--color_fill)".
You will first have to inject the SVG into the HTML DOM.
There is an open source library called SVGInject that does this for you. It uses the onload attribute to trigger the injection.
Here is a minimal example using SVGInject:
<html>
<head>
<script src="svg-inject.min.js"></script>
</head>
<body>
<img src="image.svg" onload="SVGInject(this)" />
</body>
</html>
After the image is loaded the onload="SVGInject(this) will trigger the injection and the <img> element will be replaced by the contents of the SVG file provided in the src attribute.
It solves several issues with SVG injection:
SVGs can be hidden until injection has finished. This is important if a style is already applied during load time, which would otherwise cause a brief "unstyled content flash".
The <img> elements inject themselves automatically. If you add SVGs dynamically, you don't have to worry about calling the injection function again.
A random string is added to each ID in the SVG to avoid having the same ID multiple times in the document if an SVG is injected more than once.
SVGInject is plain Javascript and works with all browsers that support SVG.
Disclaimer: I am the co-author of SVGInject
Edit your SVG file, add fill="currentColor" to svg tag and make sure to remove any other fill property from the file.
For example:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 139.435269383854" id="img" fill="currentColor">...
</svg>
Note that currentColor is a keyword (not a fixed color in use).
After that, you can change the color using CSS, by setting the color property of the element or from it's parent.
Example:
.div-with-svg-inside {
color: red;
}
I forgot to say, you must insert the SVG this way:
<svg>
<use xlink:href='/assets/file.svg#img' href="/assets/file.svg#img"></use>
</svg>
if image is coming from some variable then
<svg>
<use [attr.xlink:href]="somevariable + '#img'" [attr.href]="somevariable + '#img'"></use>
</svg>
Note that `#img` is the id of the `svg` tag inside svg file. Also note `xlink:href` has been deprecated instead you should use `href` or use can use both to support older browser versions.
Another way of doing it: [https://css-tricks.com/cascading-svg-fill-color/][1]
[1]: https://css-tricks.com/cascading-svg-fill-color/
I suggest to select your color , and go to this pen
https://codepen.io/sosuke/pen/Pjoqqp
it will convert HEX to css filter eg:#64D7D6
equal
filter: invert(88%) sepia(21%) saturate(935%) hue-rotate(123deg) brightness(85%) contrast(97%);
the final snippet
.filterit{
width:270px;
filter: invert(88%) sepia(21%) saturate(935%) hue-rotate(123deg) brightness(85%) contrast(97%);
}
<img src="https://www.flaticon.com/svg/static/icons/svg/1389/1389029.svg"
class="filterit
/>
This answer is based on answer https://stackoverflow.com/a/24933495/3890888 but with a plain JavaScript version of the script used there.
You need to make the SVG to be an inline SVG. You can make use of this script, by adding a class svg to the image:
/*
* Replace all SVG images with inline SVG
*/
document.querySelectorAll('img.svg').forEach(function(img){
var imgID = img.id;
var imgClass = img.className;
var imgURL = img.src;
fetch(imgURL).then(function(response) {
return response.text();
}).then(function(text){
var parser = new DOMParser();
var xmlDoc = parser.parseFromString(text, "text/xml");
// Get the SVG tag, ignore the rest
var svg = xmlDoc.getElementsByTagName('svg')[0];
// Add replaced image's ID to the new SVG
if(typeof imgID !== 'undefined') {
svg.setAttribute('id', imgID);
}
// Add replaced image's classes to the new SVG
if(typeof imgClass !== 'undefined') {
svg.setAttribute('class', imgClass+' replaced-svg');
}
// Remove any invalid XML tags as per http://validator.w3.org
svg.removeAttribute('xmlns:a');
// Check if the viewport is set, if the viewport is not set the SVG wont't scale.
if(!svg.getAttribute('viewBox') && svg.getAttribute('height') && svg.getAttribute('width')) {
svg.setAttribute('viewBox', '0 0 ' + svg.getAttribute('height') + ' ' + svg.getAttribute('width'))
}
// Replace image with new SVG
img.parentNode.replaceChild(svg, img);
});
});
And then, now if you do:
.logo-img path {
fill: #000;
}
Or may be:
.logo-img path {
background-color: #000;
}
JSFiddle: http://jsfiddle.net/erxu0dzz/1/
Use filters to transform to any color.
I recently found this solution, and hope somebody might be able to use it.
Since the solution uses filters, it can be used with any type of image. Not just svg.
If you have a single-color image that you just want to change the color of, you can do this with the help of some filters. It works on multicolor images as well of course, but you can't target a specific color. Only the whole image.
The filters came from the script proposed in How to transform black into any given color using only CSS filters
If you want to change white to any color, you can adjust the invert value in each filter.
.startAsBlack{
display: inline-block;
width: 50px;
height: 50px;
background: black;
}
.black-green{
filter: invert(43%) sepia(96%) saturate(1237%) hue-rotate(88deg) brightness(128%) contrast(119%);
}
.black-red{
filter: invert(37%) sepia(93%) saturate(7471%) hue-rotate(356deg) brightness(91%) contrast(135%);
}
.black-blue{
filter: invert(12%) sepia(83%) saturate(5841%) hue-rotate(244deg) brightness(87%) contrast(153%);
}
.black-purple{
filter: invert(18%) sepia(98%) saturate(2657%) hue-rotate(289deg) brightness(121%) contrast(140%);
}
Black to any color: <br/>
<div class="startAsBlack black-green"></div>
<div class="startAsBlack black-red"></div>
<div class="startAsBlack black-blue"></div>
<div class="startAsBlack black-purple"></div>
Why not create a webfont with your svg image or images, import the webfont in the css and then just change the color of the glyph using the css color attribute?
No javascript needed
Simple..
You can use this code:
<svg class="logo">
<use xlink:href="../../static/icons/logo.svg#Capa_1"></use>
</svg>
First specify the path of svg and then write it's ID, In this case "Capa_1". You can get the ID of svg by opening it in any editor.
In css:
.logo {
fill: red;
}
The answer from #Praveen is solid.
I couldn't get it to respond in my work, so I made a jquery hover function for it.
CSS
.svg path {
transition:0.3s all !important;
}
JS / JQuery
// code from above wrapped into a function
replaceSVG();
// hover function
// hover over an element, and find the SVG that you want to change
$('.element').hover(function() {
var el = $(this);
var svg = el.find('svg path');
svg.attr('fill', '#CCC');
}, function() {
var el = $(this);
var svg = el.find('svg path');
svg.attr('fill', '#3A3A3A');
});
If you are just switching the image between the real color and the black-and-white, you can set one selector as:
{filter:none;}
and another as:
{filter:grayscale(100%);}
To expand on #gringo answer, the Javascript method described in other answers works, but requires the user to download unnecessary image files, and IMO, it bloats your code.
I think a better approach would be to to migrate all 1-color vector graphics to a webfont file. I've used Fort Awesome in the past, and it works great to combine your custom icons/images in SVG format, along with any 3rd party icons you may be using (Font Awesome, Bootstrap icons, etc.) into a single webfont file the user has to download. You can also customize it, so you only include the 3rd party icons you're using. This reduces the number of requests the page has to make, and you're overall page weight, especially if you're already including any 3rd party icons libraries.
If you prefer a more dev oriented option, you could Google "npm svg webfont", and use one of the node modules that's most appropriate for your environment.
Once, you've done either of those two options, then you could easily change the color via CSS, and most likely, you've sped up your site in the process.
Since SVG is basically code, you need just contents. I used PHP to obtain content, but you can use whatever you want.
<?php
$content = file_get_contents($pathToSVG);
?>
Then, I've printed content "as is" inside a div container
<div class="fill-class"><?php echo $content;?></div>
To finnaly set rule to container's SVG childs on CSS
.fill-class > svg {
fill: orange;
}
I got this results with a material icon SVG:
Mozilla Firefox 59.0.2 (64-bit) Linux
Google Chrome66.0.3359.181 (Build oficial) (64 bits) Linux
Opera 53.0.2907.37 Linux
The main problem in your case is that you are importing the svg from an <img> tag which will hide the SVG structure.
You need to use the <svg> tag in conjunction with the <use> to get the desired effect. To make it work, you need to give an id to the path you want to use in the SVG file <path id='myName'...> to then be able to retrieve them from the <use xlink:href="#myName"/> tag.
Try the snipped below.
.icon {
display: inline-block;
width: 2em;
height: 2em;
transition: .5s;
fill: currentColor;
stroke-width: 5;
}
.icon:hover {
fill: rgba(255,255,255,0);
stroke: black;
stroke-width: 2;
}
.red {
color: red;
}
.blue {
color: blue;
}
<svg width="0" height="0">
<defs>
<path id="home" d="M100 59.375l-18.75-18.75v-28.125h-12.5v15.625l-18.75-18.75-50 50v3.125h12.5v31.25h31.25v-18.75h12.5v18.75h31.25v-31.25h12.5z"/>
</svg>
<span class="icon red">
<svg viewbox="0 0 100 100">
<use xlink:href="#home"/>
</svg>
</span>
<span class="icon blue">
<svg viewbox="0 0 100 100">
<use xlink:href="#home"/>
</svg>
</span>
Note that you can put any URL before the fragment # if you want to load the SVG from an external source (and not embed it into your HTML). Also, usually you do not specify the fill into the CSS. It's better to consider using fill:"currentColor" within the SVG itself. The corresponding element's CSS color value will then be used in place.
This might be helpful for people using PHP in combination with .svg images that they want to manipulate with CSS.
You can't overwrite properties inside a img tag with CSS. But when the svg source code is embedded in the HTML you surely can. I like to resolve this issue with a require_once function where I include a .svg.php file. It's like importing an image but you can still overwrite styles with CSS!
First include the svg file:
<?php require_once( '/assets/images/my-icon.svg.php' ); ?>
And it includes this icon for example:
<svg xmlns="http://www.w3.org/2000/svg" width="20.666" height="59.084" viewBox="0 0 20.666 59.084"><g transform="translate(-639.749 -3139)"><path d="M648.536,3173.876c0-2.875-1.725-3.8-3.471-3.8-1.683,0-3.49.9-3.49,3.8,0,3,1.786,3.8,3.49,3.8C646.811,3177.676,648.536,3176.769,648.536,3173.876Zm-3.471,2.341c-.883,0-1.437-.513-1.437-2.341,0-1.971.615-2.381,1.437-2.381.862,0,1.438.349,1.438,2.381,0,1.907-.616,2.339-1.438,2.339Z" fill="#142312"/><path d="M653.471,3170.076a1.565,1.565,0,0,0-1.416.9l-6.558,13.888h1.2a1.565,1.565,0,0,0,1.416-.9l6.559-13.887Z" fill="#142312"/><path d="M655.107,3177.263c-1.684,0-3.471.9-3.471,3.8,0,3,1.766,3.8,3.471,3.8,1.745,0,3.49-.9,3.49-3.8C658.6,3178.186,656.851,3177.263,655.107,3177.263Zm0,6.139c-.884,0-1.438-.514-1.438-2.34,0-1.972.617-2.381,1.438-2.381.862,0,1.437.349,1.437,2.381,0,1.909-.616,2.34-1.437,2.34Z" fill="#142312"/><path d="M656.263,3159.023l-1.49-14.063a1.35,1.35,0,0,0,.329-.293,1.319,1.319,0,0,0,.268-1.123l-.753-3.49a1.328,1.328,0,0,0-1.306-1.054h-6.448a1.336,1.336,0,0,0-1.311,1.068l-.71,3.493a1.344,1.344,0,0,0,.276,1.112,1.532,1.532,0,0,0,.283.262l-1.489,14.087c-1.7,1.727-4.153,4.871-4.153,8.638v28.924a1.339,1.339,0,0,0,1.168,1.49,1.357,1.357,0,0,0,.17.01h17.981a1.366,1.366,0,0,0,1.337-1.366v-29.059C660.414,3163.893,657.963,3160.749,656.263,3159.023Zm-8.307-17.349h4.274l.176.815H647.79Zm9.785,43.634v10.1H642.434v-17.253a4.728,4.728,0,0,1-2.028-4.284,4.661,4.661,0,0,1,2.028-4.215v-2c0-3.162,2.581-5.986,3.687-7.059a1.356,1.356,0,0,0,.4-.819l1.542-14.614H652.1l1.545,14.618a1.362,1.362,0,0,0,.4.819c1.109,1.072,3.688,3.9,3.688,7.059v9.153a5.457,5.457,0,0,1,0,8.5Z" fill="#142312"/></g></svg>
Now we can easily change the fill color like this with CSS:
svg path {
fill: blue;
}
I first tried to solve this problem with file_get_contents() but the solution above is much faster.
open the svg icon in your code editor and add a class after the path tag:
<path class'colorToChange' ...
You can add class to svg and change the color like this:
codepen
Know this is an old question but recently we came across the same issue, and we solved it from the server side. This is a php specific answer but I am positive that other envs have something similar.
instead of using the img tag you render the svg as svg from the get-go.
public static function print_svg($file){
$iconfile = new \DOMDocument();
$iconfile->load($file);
$tag = $iconfile->saveHTML($iconfile->getElementsByTagName('svg')[0]);
return $tag;
}
now when you render the file you will get complete inline svg
For me, my svgs looked different when having them as img and svg. So my solution converts the img to csv, changes styles internally and back to img (although it requires a bit more work), I believe "blob" also has better compatibility than the upvoted answer using "mask".
let img = yourimgs[0];
if (img.src.includes(".svg")) {
var ajax = new XMLHttpRequest();
ajax.open("GET", img.src, true);
ajax.send();
ajax.onload = function (e) {
svg = e.target.responseText;
svgText = "";
//change your svg-string as youd like, for example
// replacing the hex color between "{fill:" and ";"
idx = svg.indexOf("{fill:");
substr = svg.substr(idx + 6);
str1 = svg.substr(0, idx + 6);
str2 = substr.substr(substr.indexOf(";"));
svgText = str1 + "#ff0000" + str2;
let blob = new Blob([svgText], { type: "image/svg+xml" });
let url = URL.createObjectURL(blob);
let image = document.createElement("img");
image.src = url;
image.addEventListener("load", () => URL.revokeObjectURL(url), {
once: true,
});
img.replaceWith(image);
};
}
Simple JS
Use following short function ImgToSvg which swap img to svg (including class list)
<img src="logo.svg" onload="ImgToSvg(this)" class="logo-img"/>
const ImgToSvg= async (img) => {
const s = document.createElement('div');
s.innerHTML = await (await fetch(img.src)).text();
s.firstChild.classList = img.classList;
img.replaceWith(s.firstChild)
}
.logo-img {
fill: yellow;
}
<img onload="ImgToSvg(this)" class="logo-img" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMzAwIiBoZWlnaHQ9IjMwMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cmVjdCB4PSIyIiB5PSIyIiB3aWR0aD0iMjk2IiBoZWlnaHQ9IjI5NiIgc3R5bGU9InN0cm9rZTojNTU1NTU1O3N0cm9rZS13aWR0aDoyIi8+PHRleHQgeD0iNTAlIiB5PSI1MCUiIGZvbnQtc2l6ZT0iMTgiIHRleHQtYW5jaG9yPSJtaWRkbGUiIGFsaWdubWVudC1iYXNlbGluZT0ibWlkZGxlIiBmb250LWZhbWlseT0ibW9ub3NwYWNlLCBzYW5zLXNlcmlmIiBmaWxsPSIjNTU1NTU1Ij4zMDAmIzIxNTszMDA8L3RleHQ+PC9zdmc+" />
<!-- in this snippet I use dataURI in img src to avoid CORS problems witch reading svg data from external source by js -->
This is improvement of Waruyama answer by providing short js function
I wanted to change specific paths and/or colors only and even colorize paths differently. Also, in my case some CSS was applied to the IMG-tag directly, hence I wanted to let it be original IMG-element to not mess around with positioning and alignment.
Thanks to inspiration from this answer: https://stackoverflow.com/a/43015413/1444589, this is what worked for me:
let img = document.querySelector('img[class^="YourClassName"]');
let imgURL = img.src;
fetch(imgURL)
.then(response => response.text())
.then(text => {
let parser = new DOMParser();
let xmlDoc = parser.parseFromString(text, 'text/xml');
let svg = xmlDoc.getElementsByTagName('svg')[0];
let paths = xmlDoc.getElementsByTagName('path');
// access individual path elements directly
let leftShape = paths[0];
leftShape.setAttribute('fill', '#4F4F4F');
// or find specific color
const pathsArr = Array.from(paths);
let skirtShape = pathsArr.find(path => path.getAttribute('fill') === '#F038A5');
skirtShape.setAttribute('fill', '#0078D6');
// Replace old SVG with colorized SVG
// positioning and alignment is left untouched
let base64Str = btoa(new XMLSerializer().serializeToString(svg));
img.src = 'data:image/svg+xml;base64, ' + base64Str;
});
Why not just using CSS's filter property to manipulate the color on :hover or whatever other state? I found it works over SVG images into img tags. At least, it's almost fully supported in 2020. It seams to me the simpliest solution. The only caveat is having to tweak the filter properties in order to find the target color. But you have also this very useful tool.
for that matters you have to use your SVG as an inline HTML.
say here's your logo.svg code (when you open it on textEditor):
Logo.SVG
<svg width="139" height="100" xmlns="http://www.w3.org/2000/svg">
<!-- Note that I've Added Class Attribute 'logo-img' Here -->
<g transform="translate(-22 -45)" fill="none" fill-rule="evenodd">
<path
d="M158.023 48.118a7.625 7.625 0 01-.266 10.78l-88.11 83.875a7.625 7.625 0 01-10.995-.5l-33.89-38.712a7.625 7.625 0 0111.475-10.045l28.653 32.73 82.353-78.394a7.625 7.625 0 0110.78.266z"
fill="#00000" />
</g>
</svg>
add your desired Class/ID to it (i've added 'logo-img'):
Edited Svg
<svg class="logo-img" width="139" height="100" xmlns="http://www.w3.org/2000/svg">
<!-- Note that I've Added Class Attribute 'logo-img' Here -->
...
</svg>
Now apply Your Css Rules:
CSS
.logo-img path {
fill: #000;
}
Pro
With this way you can animate on user's actions (hover, selected,...)
Con
Your HTML File would be a mess.
Heres a Stack Snippet
<style>
body {
display: flex;
justify-content: center;
}
.logo-img path {
transition: .5s all linear;
}
.logo-img path {
fill: coral;
}
.logo-img:hover path{
fill: darkblue;
}
</style>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<svg class="logo-img" width="139" height="100" xmlns="http://www.w3.org/2000/svg">
<!-- Note that I've Added Class Attribute 'logo-img' Here -->
<g transform="translate(-22 -45)" fill="none" fill-rule="evenodd">
<path
d="M158.023 48.118a7.625 7.625 0 01-.266 10.78l-88.11 83.875a7.625 7.625 0 01-10.995-.5l-33.89-38.712a7.625 7.625 0 0111.475-10.045l28.653 32.73 82.353-78.394a7.625 7.625 0 0110.78.266z"
fill="#00000" />
</g>
</svg>
</body>
</html>
If your shape(s) are always one solid color and you have more than a couple, you can use Fontello and make a custom icon font with a whole series of your own custom SVG shapes. Then you can set/animate the size and color of all of them with CSS alone.
For all the possible use cases for this question, this is an essential paradigm to consider. I've used it in many projects. In any case, if you haven't heard of Fontello, you need to find out about it. If you know of a similar solution that is better, I would love to know.
Possible downfalls:
Icon/shape fonts are known to mess with screen readers, so that may take some handling.
Fontello can be finicky with importing shapes, and it may take some trial and error with authoring and exporting them.
Avoid any and all grouping, and use only single non-nested compound shapes.
Directly to svg fill css will not work you can use as below
<style>
svg path {
fill: red;
}
</style>
<svg xmlns="http://www.w3.org/2000/svg" width="20.666" height="59.084" viewBox="0 0 20.666 59.084"><g transform="translate(-639.749 -3139)"><path d="M648.536,3173.876c0-2.875-1.725-3.8-3.471-3.8-1.683,0-3.49.9-3.49,3.8,0,3,1.786,3.8,3.49,3.8C646.811,3177.676,648.536,3176.769,648.536,3173.876Zm-3.471,2.341c-.883,0-1.437-.513-1.437-2.341,0-1.971.615-2.381,1.437-2.381.862,0,1.438.349,1.438,2.381,0,1.907-.616,2.339-1.438,2.339Z" fill="#142312"/><path d="M653.471,3170.076a1.565,1.565,0,0,0-1.416.9l-6.558,13.888h1.2a1.565,1.565,0,0,0,1.416-.9l6.559-13.887Z" fill="#142312"/><path d="M655.107,3177.263c-1.684,0-3.471.9-3.471,3.8,0,3,1.766,3.8,3.471,3.8,1.745,0,3.49-.9,3.49-3.8C658.6,3178.186,656.851,3177.263,655.107,3177.263Zm0,6.139c-.884,0-1.438-.514-1.438-2.34,0-1.972.617-2.381,1.438-2.381.862,0,1.437.349,1.437,2.381,0,1.909-.616,2.34-1.437,2.34Z" fill="#142312"/><path d="M656.263,3159.023l-1.49-14.063a1.35,1.35,0,0,0,.329-.293,1.319,1.319,0,0,0,.268-1.123l-.753-3.49a1.328,1.328,0,0,0-1.306-1.054h-6.448a1.336,1.336,0,0,0-1.311,1.068l-.71,3.493a1.344,1.344,0,0,0,.276,1.112,1.532,1.532,0,0,0,.283.262l-1.489,14.087c-1.7,1.727-4.153,4.871-4.153,8.638v28.924a1.339,1.339,0,0,0,1.168,1.49,1.357,1.357,0,0,0,.17.01h17.981a1.366,1.366,0,0,0,1.337-1.366v-29.059C660.414,3163.893,657.963,3160.749,656.263,3159.023Zm-8.307-17.349h4.274l.176.815H647.79Zm9.785,43.634v10.1H642.434v-17.253a4.728,4.728,0,0,1-2.028-4.284,4.661,4.661,0,0,1,2.028-4.215v-2c0-3.162,2.581-5.986,3.687-7.059a1.356,1.356,0,0,0,.4-.819l1.542-14.614H652.1l1.545,14.618a1.362,1.362,0,0,0,.4.819c1.109,1.072,3.688,3.9,3.688,7.059v9.153a5.457,5.457,0,0,1,0,8.5Z" fill="#142312"/></g></svg>
This worked for me
I have the following SVG graphic:
<svg version="1.1" id="diagram" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="375px" height="150px">
<path d="M45,11.5H33.333c0.735-1.159,1.167-2.528,1.167-4C34.5,3.364,31.136,0,27,0s-7.5,3.364-7.5,7.5c0,1.472,0.432,2.841,1.167,4H9l-9,32h54L45,11.5z M22.5,7.5C22.5,5.019,24.519,3,27,3s4.5,2.019,4.5,4.5c0,1.752-1.017,3.257-2.481,4h-4.037 C23.517,10.757,22.5,9.252,22.5,7.5z" id="control"/>
</svg>
I want to programmatically change the scale of this object, but I want it to scale from the center point.
I've tried wrapping it around a <g> tag, like so
<g transform="translate(0,0)">
<path x="0" y="0" id="control" transform="scale(2)">...</path>
</g>
But this doesn't seem to work. It seems that scaling a path requires manipulation of the path's matrix, which seems horrifically difficult. Annoyingly, it's easy to scale using additive="sum" property but in this instance, I am not using a transform animation.
Can anyone help me out?
Edit: Managed to get this working nicely, for anyone who is stuck on the same thing, here is a nice way of doing it programmatically:
var elem = document.getElementById("control");
var bBox = elem.getBBox();
var scaleX = 2;
var scaleY = 2;
$(elem).attr("transform", `scale(${scaleX}, ${scaleY}) translate(${-bBox.width/2},${-bBox.height/2})`);
If you know the coordinates of the center point, then you can combine a translate and scale in one transformation. The translation is calculated as: (1 - scale) * currentPosition.
If the center is (10, 20) and you are scaling by 3 then translate by (1 - 3)*10, (1 - 3)*20 = (-20, -40):
<g transform="translate(-20, -40) scale(3)">
<path d="M45,11.5H33.333c0.735-1.159,1.167-2.528,1.167-4C34.5,3.364,31.136,0,27,0s-7.5,3.364-7.5,7.5c0,1.472,0.432,2.841,1.167,4H9l-9,32h54L45,11.5z M22.5,7.5C22.5,5.019,24.519,3,27,3s4.5,2.019,4.5,4.5c0,1.752-1.017,3.257-2.481,4h-4.037 C23.517,10.757,22.5,9.252,22.5,7.5z" id="control"/>
</g>
The transformations are applied in reverse order from the one they are declared, so in the example, above, the scale is performed first and then the translate. Scaling affects the coordinates so the translation here is in scaled coordinates.
You can calculate the center point programmatically using element.getBBox().
You can alter the origin to center:
.scaled-path-svg {
svg {
path {
transform-origin: center;
transform: scale(1.1);
}
}
}
The answer provided by aetheria earlier is great. There is another thing to take care of as well -- stroke-width, so that the outline stays of the same width while the object scales. Usage:
stroke-width: (1/scaling-factor)
So, if your scaling is by say 2, then:
stroke-width: (0.5)
NOTE: You shouldn't missout the transform: translate(...) scale(2) as mentioned by aetheria.