Is there a null-safe property access (null propagation / existence) operator in ES6 (ES2015/JavaScript.next/Harmony) like ?. in CoffeeScript for example? Or is it planned for ES7?
var aThing = getSomething() ... aThing = possiblyNull?.thing
This will be roughly like:
if (possiblyNull != null) aThing = possiblyNull.thing
Ideally the solution should not assign (even undefined) to aThing if possiblyNull is null
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Answer
Update (2020-01-31): Seems people are still finding this, here’s the current story:
- Optional Chaining specification (Stage 4): https://github.com/tc39/proposal-optional-chaining
- babel-preset-env: This is probably what you want https://babeljs.io/docs/en/babel-preset-env
- Babel v7 Plugin: https://babeljs.io/docs/en/babel-plugin-proposal-optional-chaining
Update (2017-08-01): If you want to use an official plugin, you can try the alpha build of Babel 7 with the new transform. Your mileage may vary
https://www.npmjs.com/package/babel-plugin-transform-optional-chaining
Original:
A feature that accomplishes that is currently in stage 1: Optional Chaining.
https://github.com/tc39/proposal-optional-chaining
If you want to use it today, there is a Babel plugin that accomplishes that.