Transform optional chaining on the left-hand side of assignment expressions

Transform optional chaining operators into a series of nil checks

Allow parsing of optional properties

Transform optional chaining operators to workaround https://crbug.com/v8/11558

Transform optional chaining operators into a series of nil checks

```js { plugins: [ '@babel/plugin-proposal-optional-chaining', ], presets: [ [ 'babel-preset-gatsby', { 'targets': { 'browsers': [ '>0.25%', 'not dead' ] } } ]

Compile class and object decorators to ES5

Gatsby uses the phenomenal project [Babel](https://babeljs.io/) to enable support for writing modern JavaScript — while still supporting older browsers. This package contains the default Babel setup for all Gatsby projects.

Codemod to migrate from Lodash get and logical and expressions to optional chaining

Compile export default to ES2015

This [Babel](https://babeljs.io/) preset is used for our internal packages. If you're looking for the preset a **Gatsby Site** can use, please refer to [babel-preset-gatsby](https://github.com/gatsbyjs/gatsby/blob/master/packages/babel-preset-gatsby/READM

Babel preset for stage 0 plugins

Allow parsing of optional catch bindings

Compile optional catch bindings

Wraps Throw Expressions in an IIFE

Compile the function.sent meta property to valid ES2015 code

Transform pipeline operator into call expressions

Compile function bind operator to ES5

Compile do expressions to ES5

Allow parsing of optional chaining on the left-hand side of assignment expressions