I have an SVG icon, I'm setting a fixed height for it (50px, say), but I want its width to be auto, that is, whatever it needs to be depending on the icon. (Pretty common and normal scenario, right?).
Now, the problem that I've been beating my head against the wall for, is that instead of embedding the SVG inline in the HTML, I'm intending to define it with the <symbol> tag and then reference it using the <use href="... tag, and doing so apparently requires me to set a fixed width as well as a fixed height or otherwise it will always default to about 150px, instead of just defaulting to the width of icon; this is not the case when you embed the SVG directly, you can see all of this in action in the following two snippets:
Directly-embedded SVG: (Works as expected, width is consistent with the width of the icon)
.icon {
height: 50px;
width: auto;
/* Aesthetics: */
background-color: gray;
border-radius: 5px;
}
<svg class="icon" viewBox="0 0 22.832 27.398">
<g transform="translate(-42.667)"> <g transform="translate(42.667)"> <path class="a" d="M62.074,9.133V7.991a7.991,7.991,0,1,0-15.982,0V9.133a3.429,3.429,0,0,0-3.425,3.425V23.973A3.429,3.429,0,0,0,46.092,27.4H62.074A3.429,3.429,0,0,0,65.5,23.973V12.557A3.429,3.429,0,0,0,62.074,9.133Zm-13.7-1.142a5.708,5.708,0,0,1,11.416,0V9.133H48.375ZM63.216,23.973a1.143,1.143,0,0,1-1.142,1.142H46.092a1.143,1.143,0,0,1-1.142-1.142V12.557a1.143,1.143,0,0,1,1.142-1.142H62.074a1.143,1.143,0,0,1,1.142,1.142Z" transform="translate(-42.667)"></path> </g> <g transform="translate(50.658 13.128)"> <path class="a" d="M195.425,245.333a3.416,3.416,0,0,0-1.142,6.639v1.922a1.142,1.142,0,1,0,2.283,0v-1.922a3.416,3.416,0,0,0-1.142-6.639Zm0,4.566a1.142,1.142,0,1,1,1.142-1.142A1.143,1.143,0,0,1,195.425,249.9Z" transform="translate(-192 -245.333)"></path> </g> </g>
</svg>
But using the <use> tag: (Width is coming from nowhere!)
.icon {
height: 50px;
width: auto;
/* Aesthetics: */
background-color: gray;
border-radius: 5px;
}
<svg style="display: none;">
<symbol id="lock" viewBox="0 0 22.832 27.398">
<g transform="translate(-42.667)"> <g transform="translate(42.667)"> <path class="a" d="M62.074,9.133V7.991a7.991,7.991,0,1,0-15.982,0V9.133a3.429,3.429,0,0,0-3.425,3.425V23.973A3.429,3.429,0,0,0,46.092,27.4H62.074A3.429,3.429,0,0,0,65.5,23.973V12.557A3.429,3.429,0,0,0,62.074,9.133Zm-13.7-1.142a5.708,5.708,0,0,1,11.416,0V9.133H48.375ZM63.216,23.973a1.143,1.143,0,0,1-1.142,1.142H46.092a1.143,1.143,0,0,1-1.142-1.142V12.557a1.143,1.143,0,0,1,1.142-1.142H62.074a1.143,1.143,0,0,1,1.142,1.142Z" transform="translate(-42.667)" /> </g> <g transform="translate(50.658 13.128)"> <path class="a" d="M195.425,245.333a3.416,3.416,0,0,0-1.142,6.639v1.922a1.142,1.142,0,1,0,2.283,0v-1.922a3.416,3.416,0,0,0-1.142-6.639Zm0,4.566a1.142,1.142,0,1,1,1.142-1.142A1.143,1.143,0,0,1,195.425,249.9Z" transform="translate(-192 -245.333)" /> </g> </g>
</symbol>
</svg>
<svg class="icon">
<use href="#lock"></use>
</svg>
I've already checked out this question, as well as this one, and I've realized that by adding the "viewBox" of the icon to the referencing SVG, the problem would be solved, like this:
.icon {
height: 50px;
width: auto;
/* Aesthetics: */
background-color: gray;
border-radius: 5px;
}
<svg style="display: none;">
<symbol id="lock" viewBox="0 0 22.832 27.398">
<g transform="translate(-42.667)"> <g transform="translate(42.667)"> <path class="a" d="M62.074,9.133V7.991a7.991,7.991,0,1,0-15.982,0V9.133a3.429,3.429,0,0,0-3.425,3.425V23.973A3.429,3.429,0,0,0,46.092,27.4H62.074A3.429,3.429,0,0,0,65.5,23.973V12.557A3.429,3.429,0,0,0,62.074,9.133Zm-13.7-1.142a5.708,5.708,0,0,1,11.416,0V9.133H48.375ZM63.216,23.973a1.143,1.143,0,0,1-1.142,1.142H46.092a1.143,1.143,0,0,1-1.142-1.142V12.557a1.143,1.143,0,0,1,1.142-1.142H62.074a1.143,1.143,0,0,1,1.142,1.142Z" transform="translate(-42.667)" /> </g> <g transform="translate(50.658 13.128)"> <path class="a" d="M195.425,245.333a3.416,3.416,0,0,0-1.142,6.639v1.922a1.142,1.142,0,1,0,2.283,0v-1.922a3.416,3.416,0,0,0-1.142-6.639Zm0,4.566a1.142,1.142,0,1,1,1.142-1.142A1.143,1.143,0,0,1,195.425,249.9Z" transform="translate(-192 -245.333)" /> </g> </g>
</symbol>
</svg>
<svg class="icon" viewBox="0 0 22.832 27.398"> <!-- Copy-pasted the viewbox here -->
<use href="#lock"></use>
</svg>
But obviously this is very inconvenient, repetitive, error-prone, and indeed ugly to write. So, I'd appreciate any workarounds. Isn't there a way to set the viewBox attribute to "auto" or something which means "whatever the inner SVG is", so as to avoid writing (or copy-pasting, rather) the viewBox each time you want to reference an icon?
To be honest, I think everyone would intuitively kind of expect this to work like regular embedded SVGs since the viewBox is already set once on the symbol that is being referenced.
I'd highly recommend:
Make all your icons have a consistent viewBox. For example, "0 0 24 24" is a common one that many icon libraries use. That way you don't have to find and copy the correct viewBox where you need it. It's always "0 0 24 24".
Add a class to the referencing <svg> that you can use for setting the icon width.
<svg class="icon lock" viewBox="0 0 24 24">
<use href="#lock"></use>
</svg>
Then in your CSS:
.icon {
// as above
}
.icon.lock {
width: 45px;
height: 50px;
}
.icon.something-else {
width: 35px;
height: 50px;
}
As long as your icon is horizontally centred in its viewBox, everything will work.
Default size (square) icons need no extra CSS. You only need to add a CSS rule for the non-square ones.
If you're not opposed to using some JavaScript, the following should work. Load it once, no matter how many icons you have on your page.
document.querySelectorAll(".icon").forEach(node => {
const href = node.querySelector("use").href.baseVal;
const icon = document.querySelector(href);
const vb = icon.viewBox.baseVal;
node.setAttribute("viewBox", `${vb.x} ${vb.y} ${vb.width} ${vb.height}`);
});
.icon {
height: 50px;
width: auto;
/* Aesthetics: */
background-color: gray;
border-radius: 5px;
}
<svg style="display: none;">
<symbol id="lock" viewBox="0 0 22.832 27.398">
<g transform="translate(-42.667)">
<g transform="translate(42.667)">
<path
class="a"
d="M62.074,9.133V7.991a7.991,7.991,0,1,0-15.982,0V9.133
a3.429,3.429,0,0,0-3.425,3.425V23.973A3.429,3.429,0,0,0,46.092,27.4
H62.074A3.429,3.429,0,0,0,65.5,23.973V12.557
A3.429,3.429,0,0,0,62.074,9.133Z
m-13.7-1.142a5.708,5.708,0,0,1,11.416,0V9.133H48.375Z
M63.216,23.973a1.143,1.143,0,0,1-1.142,1.142H46.092
a1.143,1.143,0,0,1-1.142-1.142V12.557a1.143,1.143,0,0,1,1.142-1.142
H62.074a1.143,1.143,0,0,1,1.142,1.142Z"
transform="translate(-42.667)">
</path>
</g>
<g transform="translate(50.658 13.128)">
<path
class="a"
d="M195.425,245.333a3.416,3.416,0,0,0-1.142,6.639v1.922
a1.142,1.142,0,1,0,2.283,0v-1.922a3.416,3.416,0,0,0-1.142-6.639Z
m0,4.566a1.142,1.142,0,1,1,1.142-1.142
A1.143,1.143,0,0,1,195.425,249.9Z"
transform="translate(-192 -245.333)">
</path>
</g>
</g>
</symbol>
</svg>
<svg class="icon">
<use href="#lock"></use>
</svg>
If you want to add icons dynamically - after page load, the following would also be an improvement over adding a manual viewBox:
function iconLoaded(event) {
const node = event.target;
const href = node.querySelector("use").href.baseVal;
const icon = document.querySelector(href);
const vb = icon.viewBox.baseVal;
node.setAttribute("viewBox", `${vb.x} ${vb.y} ${vb.width} ${vb.height}`);
}
.icon {
height: 50px;
width: auto;
/* Aesthetics: */
background-color: gray;
border-radius: 5px;
}
<svg style="display: none;">
<symbol id="lock" viewBox="0 0 22.832 27.398">
<g transform="translate(-42.667)">
<g transform="translate(42.667)">
<path
class="a"
d="M62.074,9.133V7.991a7.991,7.991,0,1,0-15.982,0V9.133
a3.429,3.429,0,0,0-3.425,3.425V23.973A3.429,3.429,0,0,0,46.092,27.4
H62.074A3.429,3.429,0,0,0,65.5,23.973V12.557
A3.429,3.429,0,0,0,62.074,9.133Z
m-13.7-1.142a5.708,5.708,0,0,1,11.416,0V9.133H48.375Z
M63.216,23.973a1.143,1.143,0,0,1-1.142,1.142H46.092
a1.143,1.143,0,0,1-1.142-1.142V12.557a1.143,1.143,0,0,1,1.142-1.142
H62.074a1.143,1.143,0,0,1,1.142,1.142Z"
transform="translate(-42.667)">
</path>
</g>
<g transform="translate(50.658 13.128)">
<path
class="a"
d="M195.425,245.333a3.416,3.416,0,0,0-1.142,6.639v1.922
a1.142,1.142,0,1,0,2.283,0v-1.922a3.416,3.416,0,0,0-1.142-6.639Z
m0,4.566a1.142,1.142,0,1,1,1.142-1.142
A1.143,1.143,0,0,1,195.425,249.9Z"
transform="translate(-192 -245.333)">
</path>
</g>
</g>
</symbol>
</svg>
<svg class="icon" onload="iconLoaded(event)">
<use href="#lock"></use>
</svg>
I have some silhouette type images and they need to be able to change color, sometimes just to display in different locations, sometimes for hover effects.
This is easy enough to do with the SVG directly embedded into the HTML. Copy-paste and CSS to your heart's desire.
But then I have to copy-paste or programatically insert everywhere I want it. Some of these are used dozens of times. It just seems poor practice to re-transmit the same SVG markup repeatedly.
Is there a best-of-both-worlds solution, where I can CSS the paths and also somehow reuse the SVG on the front-end?
There is a tag in svg that let's you reuse "symbols". I think that is as close as you'll get.
You create a symbol by wrapping your paths etc in a symbol-element. Give it an id (so you can re-use it later):
<svg style="display: none;">
<symbol id="ic">
<paths and polygons and other fun stuff>
</symbol>
</svg>
Now you can reuse this symbol with <use> and xlink:href pointing to the symbol you made. And you can add classes freely to change things up:
<svg viewBox="0 0 100 125" xmlns:xlink="http://www.w3.org/1999/xlink">
<use xlink:href="#ic" class="ic-blue" x="0" y="0" />
</svg>
Examples and code shamelessly plucked from https://tympanus.net/codrops Go read their content and click their ads! If there ever was a site deserving an exception in your ad-blocker, this is it.
https://tympanus.net/codrops/2015/07/16/styling-svg-use-content-css/
body {
padding: 2em;
}
svg {
width: 100px;
height: 125px;
border: 1px solid #ddd;
}
use.ic-1 {
fill: skyblue;
}
use.ic-2 {
fill: #FDC646;
}
use.ic-3 {
fill: #FF2D49;
}
svg path {
fill: inherit;
}
<svg style="display: none;">
<symbol id="ic">
<path fill="#000000" d="M81,40.933c0-4.25-3-7.811-6.996-8.673c-0.922-5.312-3.588-10.178-7.623-13.844 c-2.459-2.239-5.326-3.913-8.408-4.981c-0.797-3.676-4.066-6.437-7.979-6.437c-3.908,0-7.184,2.764-7.979,6.442 c-3.078,1.065-5.939,2.741-8.396,4.977c-4.035,3.666-6.701,8.531-7.623,13.844C22.002,33.123,19,36.682,19,40.933 c0,2.617,1.145,4.965,2.957,6.589c0.047,0.195,0.119,0.389,0.225,0.568l26.004,43.873c0.383,0.646,1.072,1.04,1.824,1.04 c0.748,0,1.439-0.395,1.824-1.04L77.82,48.089c0.105-0.179,0.178-0.373,0.225-0.568C79.855,45.897,81,43.549,81,40.933z M49.994,11.235c2.164,0,3.928,1.762,3.928,3.93c0,2.165-1.764,3.929-3.928,3.929s-3.928-1.764-3.928-3.929 C46.066,12.997,47.83,11.235,49.994,11.235z M27.842,36.301c0.014,0,0.027,0,0.031,0c1.086,0,1.998-0.817,2.115-1.907 c0.762-7.592,5.641-13.791,12.303-16.535c1.119,3.184,4.146,5.475,7.703,5.475c3.561,0,6.588-2.293,7.707-5.48 c6.664,2.742,11.547,8.944,12.312,16.54c0.115,1.092,1.037,1.929,2.143,1.907c2.541,0.013,4.604,2.087,4.604,4.631 c0,1.684-0.914,3.148-2.266,3.958H25.508c-1.354-0.809-2.268-2.273-2.268-3.958C23.24,38.389,25.303,36.316,27.842,36.301z M50.01,86.723L27.73,49.13h44.541L50.01,86.723z"/>
</symbol>
</svg>
<svg viewBox="0 0 100 125" xmlns:xlink="http://www.w3.org/1999/xlink">
<use class="ic-1" xlink:href="#ic" x="0" y="0" />
</svg>
<svg viewBox="0 0 100 125" xmlns:xlink="http://www.w3.org/1999/xlink">
<use class="ic-2" xlink:href="#ic" x="0" y="0" />
</svg>
<svg viewBox="0 0 100 125" xmlns:xlink="http://www.w3.org/1999/xlink">
<use class="ic-3" xlink:href="#ic" x="0" y="0" />
</svg>
I'm currently uninstalling a page builder on my website, but I want to keep some of its styles.
I copied the html of an element, it used to have a red color on the stripes which are now black/grey, but I got problems changing the color of them.
Only color I can change is the background.
<svg xmlns="http://www.w3.org/2000/svg" style="max-height:100px;
margin-bottom: 30px;" viewBox="0 0 1000 100" preserveAspectRatio="none">
<path style="width: 2500px;" opacity="0.33" d="M473,67.3c-203.9,88.3-263.1-34-320.3,0C66,119.1,0,59.7,0,59.7V0h1000v59.7 c0,0-62.1,26.1-94.9,29.3c-32.8,3.3-62.8-12.3-75.8-22.1C806,49.6,745.3,8.7,694.9,4.7S492.4,59,473,67.3z"></path>
<path style="width: 2500px;" opacity="0.66" d="M734,67.3c-45.5,0-77.2-23.2-129.1-39.1c-28.6-8.7-150.3-10.1-254,39.1 s-91.7-34.4-149.2,0C115.7,118.3,0,39.8,0,39.8V0h1000v36.5c0,0-28.2-18.5-92.1-18.5C810.2,18.1,775.7,67.3,734,67.3z"></path>
<path style="width: 2500px;" d="M766.1,28.9c-200-57.5-266,65.5-395.1,19.5C242,1.8,242,5.4,184.8,20.6C128,35.8,132.3,44.9,89.9,52.5C28.6,63.7,0,0,0,0 h1000c0,0-9.9,40.9-83.6,48.1S829.6,47,766.1,28.9z"></path>
</svg>
Thanks for any help in advance!
You probabily want to include the css files from your page builder to add the style to your HTML page.
But for now, if you want your <svg> to be red use the property fill:
path {
fill: red;
}
<svg xmlns="http://www.w3.org/2000/svg" style="max-height:100px;
margin-bottom: 30px;" viewBox="0 0 1000 100" preserveAspectRatio="none">
<path style="width: 2500px;" opacity="0.33" d="M473,67.3c-203.9,88.3-263.1-34-320.3,0C66,119.1,0,59.7,0,59.7V0h1000v59.7 c0,0-62.1,26.1-94.9,29.3c-32.8,3.3-62.8-12.3-75.8-22.1C806,49.6,745.3,8.7,694.9,4.7S492.4,59,473,67.3z"></path>
<path style="width: 2500px;" opacity="0.66" d="M734,67.3c-45.5,0-77.2-23.2-129.1-39.1c-28.6-8.7-150.3-10.1-254,39.1 s-91.7-34.4-149.2,0C115.7,118.3,0,39.8,0,39.8V0h1000v36.5c0,0-28.2-18.5-92.1-18.5C810.2,18.1,775.7,67.3,734,67.3z"></path>
<path style="width: 2500px;" d="M766.1,28.9c-200-57.5-266,65.5-395.1,19.5C242,1.8,242,5.4,184.8,20.6C128,35.8,132.3,44.9,89.9,52.5C28.6,63.7,0,0,0,0 h1000c0,0-9.9,40.9-83.6,48.1S829.6,47,766.1,28.9z"></path>
</svg>
I'm trying to animate some vector graphics. Therefore I need to use svg inline or use something like https://github.com/jonathantneal/svg4everybody for external embedding in IE. So my HTML looks like this currently:
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
<symbol id="chart" viewBox="0 0 1042 1024"><!-- SVG CODE --></symbol>
</svg>
<svg role="img" class="icon" width="200" height="200">
<use xlink:href="#chart"></use>
</svg>
http://codepen.io/anon/pen/LEWjvX
But as you might see the SVG is pretty small, although I used width both in the HTML and CSS (not sure if I need both?). It just doesn't scale. According to many articles I read about this problem (like this one http://css-tricks.com/svg-symbol-good-choice-icons/ or http://css-tricks.com/scale-svg/) it should work that way. What am I doing wrong?
FYI: I used icomoon to create the SVG sprite and Illustrator to create the SVGs. To animate the SVG I gave most of the paths a class name, if that makes any difference.
I'm not sure I understand clearly what's the problem you're asking for help so I'll try to answer a maximum I saw in your snippet.
If you can't see the chart, I think it's more because of the default fill color being black, than because of the size. If you add fill: #FFF into your #wrapper's css or in an appropriate svg{} statement, you'll see it clearly.
If your compass is so small, I think it's because your drawn pathes only are 50px large in a 1024x1024 document. (You're setting a viewBox="0 0 1024 1024" to your <symbol> element but setting it to something like 0 0 50 50 will help if you want to use transformations later, or even better, redraw it in a document where they fit right).
You say that you want to animate those graphics. There are actually a lot of ways to do so. You can look to CSS animations (via a style sheet) or SMIL (directly in the inline svg) or via javascript (by modifying directly the attributes as noticed in Nicholas Kyriakides answer). Look at the examples in the snippet below.
var scale = 1;
window.onload = function(){
document.getElementById('p').addEventListener('click', function(){document.getElementById('linked').setAttribute('transform', 'scale('+(scale+=.1)+')');}, false);
document.getElementById('m').addEventListener('click', function(){document.getElementById('linked').setAttribute('transform', 'scale('+(scale-=.1)+')');}, false);
};
.icon {
width: 400px;
height: 200px;
}
.wrapper {
background: black;
width: 80%;
max-width: 400px;
margin: 0 auto;
color:#fff;
fill: #fff;
}
text {
cursor: pointer;
}
.icon:hover{
cursor: pointer;
}
.icon:hover .chart{
fill: #FAF;
-webkit-animation: color 5s;
animation: color 5s forwards alternate;
}
#-webkit-keyframes color{
0%{ fill : #FFF;}
10%{ fill : #508694;}
50%{fill: #FBB03B;}
90%{ fill : #D19B6F;}
100%{ fill : #FFF;}
}
#keyframes color{
0%{ fill : #FFF;}
10%{ fill : #508694;}
50%{fill: #FBB03B;}
90%{ fill : #D19B6F;}
100%{ fill : #FFF;}
}
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
<symbol id="chart" viewBox="0 0 1042 1024">
<path class="chart" d="M893.78 455.769h145.017v568.231h-145.017v-568.231z" />
<path class="chart" d="M671.815 0h145.017v1024h-145.017v-1024z" />
<path class="chart bar3" d="M446.89 624.462h145.017v396.578h-145.017v-396.578z" />
<path class="chart" d="M224.925 227.884h145.017v796.116h-145.017v-796.116z" />
<path class="chart" d="M0 71.029h145.017v952.971h-145.017v-952.971z" />
</symbol>
<symbol id="compass" viewBox="0 0 46.6 46.6">
<path class="compas__outer" fill="#FFFFFF" d="M22.7,0C10.2,0,0,10.2,0,22.7c0,12.5,10.2,22.7,22.7,22.7 c12.5,0,22.7-10.2,22.7-22.7C45.4,10.2,35.3,0,22.7,0L22.7,0z M22.7,42.9c-11.1,0-20.1-9-20.1-20.1c0-11.1,9-20.1,20.1-20.1 c11.1,0,20.1,9,20.1,20.1C42.9,33.8,33.8,42.9,22.7,42.9L22.7,42.9z M22.7,42.9"/>
<path class="compass__needle" fill="#FFFFFF" d="M24.7,20.7C24,20,23,19.7,22,19.9l1.5-1.5l-12-6.9l6.9,12l1.5-1.5 c-0.2,0.9,0,2,0.8,2.7c0.7,0.7,1.8,1,2.7,0.8L21.9,27l12,6.9l-6.9-12l-1.5,1.5C25.7,22.5,25.5,21.4,24.7,20.7L24.7,20.7z M21.8,23.6c-0.5-0.5-0.5-1.3,0-1.8c0.5-0.5,1.3-0.5,1.8,0c0.5,0.5,0.5,1.3,0,1.8C23.1,24.1,22.3,24.1,21.8,23.6L21.8,23.6z M31.9,31.9l-8.7-5.1l3.7-3.7L31.9,31.9z M31.9,31.9">
<animateTransform attributeName="transform" begin="0s" dur="2s" type="rotate" from="0 22.7 22.7" to="360 22.7 22.7" repeatCount="indefinite" />
</path>
</symbol>
<symbol id="linked-in" viewBox="0 0 1070 1024">
<path d="M241.778 1024v-689.778h-227.556v689.778h227.556zM128 238.222c78.222 0 128-53.333 128-120.889s-46.222-117.333-128-117.333c-78.222 0-128 49.778-128 120.889 0 64 49.778 117.333 128 117.333v0 0zM369.778 1024c0 0 3.556-625.778 0-689.778h227.556v99.556c28.444-46.222 85.333-117.333 209.778-117.333 149.333 0 263.111 99.556 263.111 309.333v394.667h-227.556v-366.222c0-92.444-32-156.444-117.333-156.444-64 0-99.556 42.667-117.333 85.333-7.111 14.222-7.111 35.556-7.111 56.889v384h-231.111z" fill="#FFF"/>
</symbol>
</svg>
<div class="wrapper">
<h1>CSS #keyframe</h1>
<svg role="img" class="icon" width="400" height="200">
<!-- I had to get it out of the <use> because webkit browsers ##ø‡~! http://codepen.io/AmeliaBR/pen/lshrp-->
<g id="chart">
<path class="chart" d="M172.1,90.6H200V200h-27.9V90.6L172.1,90.6z"/>
<path class="chart" d="M129.3,2.8h27.9V200h-27.9L129.3,2.8L129.3,2.8z"/>
<path class="chart" d="M86,123.1H114v76.4H86V123.1L86,123.1z"/>
<path class="chart" d="M43.3,46.7h27.9V200H43.3L43.3,46.7L43.3,46.7z"/>
<path class="chart" d="M0,16.5h27.9V200H0C0,200,0,16.5,0,16.5z"/>
</g>
<use xlink:href="#chart" id="charts" x="100"></use>
</svg>
<h1>SMIL animateTransfrom</h1>
<svg viewBox="0 0 1024 1024" preserveAspectRatio="xMidYMin slice" style="width: 100%; padding-bottom: 80%; height: 70px; overflow: visible">
<use xlink:href="#compass"></use>
</svg>
<h1>Javascript</h1>
<svg viewBox="0 0 1024 1024">
<use xlink:href="#linked-in" id="linked"></use>
<text id="p" font-size="200" y="140" x="650">+</text>
<text id="m" font-size="200" y="140" fill="" x="800">-</text>
</svg>
</div>
Try this; change the viewBox of the symbol to be closer to size it was designed in. I did a quick look for the outer dimensions of the paths, then assumed 100x100.
<symbol id="compass" viewBox="0 0 100 100">
CodePen: http://codepen.io/rfornal-ssi/pen/GgWMvZ
I only adjusted one part, assuming that you can more forward with the rest of the code from this point.
UPDATE:
Based on testing by the OP, we learned that add viewBox to the <svg> tag itself is not needed since <symbol> tags are used.