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noblesilence/detect-modern-browser.js

Created March 6, 2018 03:21
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detect-modern-browser.js
<script>document.documentElement.className="js";var supportsCssVars=function(){var e,t=document.createElement("style");return t.innerHTML="root: { --tmp-var: bold; }",document.head.appendChild(t),e=!!(window.CSS&&window.CSS.supports&&window.CSS.supports("font-weight","var(--tmp-var)")),t.parentNode.removeChild(t),e};supportsCssVars()||alert("Please view this in a modern browser such as latest version of Chrome or Microsoft Edge.");</script>
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