Include and combine SVG files into your HTML to reference them as SVG templates. Chris Coyier explains this mechanism nicely on his blog CSS-Tricks
If you haven't used grunt before, be sure to check out the Getting Started guide, as it explains how to create a gruntfile as well as install and use grunt plugins. Once you're familiar with that process, install this plugin with this command:
npm install --save-dev grunt-svgtemplater
This task looks through your projects image directory for SVG files, extracts their content, wraps it into individual SVG groups with
id="svg-[filename]" and writes these new groups into your HTML file so you can reference them as templates throughout your site like this:
<svg id="svgtemplater"></svg> in your destination HTML file where you want the combined SVG groups to go. It'll be decorated with style
display: none; automatically so you don't end up with a mess of SVGs somewhere on your site.