loading theme from other domain fails with CORS error

[trusktr]

When I try

new MapView({
  theme: 'https://www.harp.gl/docs/master/examples/resources/berlin_tilezen_effects_outlines.json',
})

I get a familiar CORS error in the app:

MapView: Failed to load theme from https://www.harp.gl/docs/master/examples/resources/berlin_tilezen_effects_outlines.json: TypeError: Failed to fetch TypeError: Failed to fetch

How can we make this work?

[zbigg]

I didn't try for long time, but you may @here/harp-map-theme hosted directly from unpkg.com, try this:

https://unpkg.com/@here/harp-map-theme@0.28.0/resources/berlin_tilezen_effects_outlines.json

Same url with browser for available themes: https://unpkg.com/browse/@here/harp-map-theme@0.28.0

At least, unpkg shouldn't emit CORS failures.