wesbos

function testCSSVariables() {
 var color = 'rgb(255, 198, 0)';
 var el = document.createElement('span');

 el.style.setProperty('--color', color);
 el.style.setProperty('background', 'var(--color)');
 document.body.appendChild(el);

 var styles = getComputedStyle(el);
 var doesSupport = styles.backgroundColor === color;

cobyism

Deploying a subfolder to GitHub Pages

Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.

For the sake of this example, let’s pretend the subfolder containing your site is named dist.

Step 1

Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).