Needs compilation step

[fregante]

browserify automatically skips transforms (babel) on external modules so arrow functions are imported as is and don't work in Safari and IE.

I'd suggest rollup + rollup-buble

[fregante]

That doesn't really "fix" it. As is it's incompatible with all versions of Safari and breaks the JS file that imports it. Not to mention UglifyJS, which crashes on =>, preventing the file creation for any browser. mishoo/UglifyJS#448

[sindresorhus]

@bfred-it Not really something I care about, sorry. I made this to solve my own use-case, which is in an Electron app and a Chrome extension, both fully supporting ES2015. I've now document the requirement. There are probably other similar modules out there you can use instead ;)