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babel-preset-stage-3

The gist of Stage 3 is:

Stage 3: candidate

What is it? The proposal is mostly finished and now needs feedback from implementations and users to progress further.

What’s required? The spec text must be complete. Designated reviewers (appointed by TC39, not by the champion) and the ECMAScript spec editor must sign off on the spec text. There must be at least two spec-compliant implementations (which don’t have to be enabled by default).

What’s next? Henceforth, changes should only be made in response to critical issues raised by the implementations and their use.

This preset includes the following plugins:

• transform-object-rest-spread
• transform-async-generator-functions

trailing-commas, async, exponentiation will be removed in the next major since they are stage 4 already

• syntax-trailing-function-commas
• transform-async-to-generator
• transform-exponentiation-operator

Install

npm install --save-dev babel-preset-stage-3

Usage

Via .babelrc (Recommended)

.babelrc

{
  "presets": ["stage-3"]
}

Via CLI

babel script.js --presets stage-3

Via Node API

require("babel-core").transform("code", {
  presets: ["stage-3"]
});

References

• Chapter "The TC39 process for ECMAScript features" in "Exploring ES2016 and ES2017" by Axel Rauschmayer