TypeError: Cannot read property 'magicString' of undefined about buble

[trusktr]

I made a reproduction here: https://github.com/trusktr/infamous/tree/Rich-Harris-buble-issue-85

To reproduce run npm i && npm run build-global.

[adrianheine]

Your actual error:

Tagged template strings are not supported. Use transforms: { templateString: false } to skip transformation and disable this error, or transforms: { dangerousTaggedTemplateString: true } if you know what you're doing (38:33)

[adrianheine]

If you update your bublé dependency you should get the actual error.

[trusktr]

Ah, I see, it was just an unhelpful error message. I'll update, and use Babel for that.

[adrianheine]

You can definitely use tagged template strings with bublé, it just doesn't provide a raw property, which probably most tag functions don't use.

[trusktr]

Hehe, funny thing is I'm using the raw property to implement regexr which relies on raw to make it easy to compose RegExps with template strings without having to double-escape everything. f.e.

const r = require('regexr')
const number = r`${r.integer}|${r.digit}*\.${r.integer}|${r.integer}\.${r.digit}*`
const wholeStringNumber = r`^${number}$`

r.integer instanceof RegExp // true
number instanceof RegExp // true
wholeStringNumber instanceof RegExp // true

Yep, after updating the message is much more helpful:

[!] (buble plugin) CompileError: Tagged template strings are not supported. Use `transforms: { templateString: false }` to skip transformation and disable this error, or `transforms: { dangerousTaggedTemplateString: true }` if you know what you're doing (11:20)

[trusktr]

It'd be great if the playground was configurable so we can test out various options. f.e. wish this could work for just taking a look at what it does without having to go install stuff and do it from command line: https://buble.surge.sh/#function%20foo()%20%7B%7D%0Aconst%20f%20%3D%20foo%60asdfasdfasdf%60

[trusktr]

Ah, this is nice, a Rollup-in-browser fiddle with Buble: https://jsfiddle.net/rwk0qt4f/22 !

[LeeeeeeM]

For some users, rollup does not support the syntax (for .... of)