amis-rpc-design/node_modules/babel-core/README.md

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2023-10-07 19:42:30 +08:00
## babel-bridge
This repo holds what we're calling a "bridge" package that is meant to ease the
transition for libraries that use "babel-core" as a peer dependency for Babel 6.
The issue with Babel 7's transition to scopes is that if a package depends on
Babel 6, they may want to add support for Babel 7 alongside. Because Babel 7
will be released as `@babel/core` instead of `babel-core`, maintainers have
no way to do that transition without making a breaking change. e.g.
```js
peerDependencies: {
"babel-core": "6.x"
}
```
cannot change to
```js
peerDependencies: {
"@babel/core": "6.x"
}
```
without it being a breaking change.
### Solution
To address this, we're releasing this bridge package, to allow users to do
```js
peerDependencies: {
"babel-core": "6.x | ^7.0.0-bridge"
}
```
then where users of this package would originally have done
```sh
npm i some-package babel-core
```
to install Babel 6, they could now do
```sh
npm i some-package babel-core@^7.0.0-bridge @babel/core
```
to install the bridge package, and install Babel 7's core.