Promise needs a featurefill import since IE 11 doesn't have native support.

Do you want to request a feature or report a bug?

bug

What is the current behavior?

$ git clone https://github.com/tinymce/tinymce
$ yarn
$ grunt
Running "shell:tsc" (shell) task

Running "tslint:files" (tslint) task
>> ERROR: src/core/main/ts/api/util/Promise.ts:132:12 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> ERROR: src/core/main/ts/api/util/Promise.ts:140:12 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> ERROR: src/core/main/ts/api/util/Promise.ts:171:12 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> ERROR: src/core/main/ts/api/util/Promise.ts:177:12 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> ERROR: src/core/main/ts/api/util/Promise.ts:183:12 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> ERROR: src/themes/silver/demo/ts/components/DialogComponentsDemo.ts:298:21 - Promise needs a featurefill import since IE 11 doesn't have native support.
>> 6 errors and 0 warnings in 1516 files
Warning: Task "tslint:files" failed. Use --force to continue.

Aborted due to warnings.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via fiddle.tinymce.com or similar.

What is the expected behavior?

Which versions of TinyMCE, and which browser / OS are affected by this issue? Did this work in previous versions of TinyMCE?

[TheSpyder]

Sorry. An update was pushed to our TSLint rules before the TinyMCE master branch was ready to be published (we’re about to make a major change that restructures our open source projects into a monorepo).

For now, if you downgrade @ephox/tslint-rules to version 1.0.9 the build will work again. We will consider reverting the rules package until next week if this becomes a major problem.

[TheSpyder]

This should now be fixed.