I discovered this a few days ago, and have already used it a few times. Seems to be a lot easier to use than other generators. The only problem I've had is when you add prefixes to the grid names, and then create a CodePen, the prefixes don't show up in the CodePen.

Edge fails in the below code on TrimEnd with this message

Microsoft Edge 44.17763.1.0

Object doesn't support property or method 'trimEnd'

: function createTemplateArr(number) { return '1fr ' .repeat(number) .trimEnd() .split(' ') }

MDN's compat chart doesn't make clear if Edge supports this or not but manual experimentation suggests not although trimRight is supported so a possible polyfill. I filed a bug against Edge just now.

Chrome iPhone, just seeing purple nothing else.

On Safari 11.1.1 TypeError: "1fr ".repeat(e).trimEnd is not a function.

> TypeError: "1fr ".repeat(...).trimEnd is not a function

Firefox 60 ESR

Firefox on UBUNTU , there is nothing to see.

Seems to break if the names have spaces

Chrome Android, cannot add text