Roman 85fc6a7daa [chroma-js] Fix return type of alpha method and add valid (#37819) ...

* Fix return type of `alpha` method

* Add static `valid` method

2019-08-29 17:54:39 -07:00

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v0

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chroma-js-tests.ts

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index.d.ts

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tsconfig.json

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tslint.json

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