Created
August 25, 2016 08:05
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Test if ES6 is ~fully supported
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| var supportsES6 = function() { | |
| try { | |
| new Function("(a = 0) => a"); | |
| return true; | |
| } | |
| catch (err) { | |
| return false; | |
| } | |
| }(); |
@triblondon Yup, the critical test is the a = 0 (all browsers supporting default parameters have a fairly complete support of ES6 -- for example, Edge 13 will be rejected by this test despite a decent ES6 coverage).
<html>
<head>
<script>
if (typeof Symbol === 'undefined') {
document.write('<script crossorigin="anonymous" src="https://polyfill.io/v3/polyfill.min.js?features=es6,es7&flags=gated"><\/script>')
}
</script>
</head>
<body>
</body>
</html>
@triblondon Yup, the critical test is the
a = 0(all browsers supporting default parameters have a fairly complete support of ES6 -- for example, Edge 13 will be rejected by this test despite a decent ES6 coverage).
I wanna know how to prove “all browsers supporting default parameters have a fairly complete support of ES6”
Thankfully， if you can show links or refs
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@rik optimising for the modern browsers, you could
<link rel=preload>it