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index.ts
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index.ts
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import { declare } from "@babel/helper-plugin-utils";
const SUPPORTED_MODULES = ["commonjs", "amd", "systemjs"];
const MODULES_NOT_FOUND = `\
@babel/plugin-transform-dynamic-import depends on a modules
transform plugin. Supported plugins are:
- @babel/plugin-transform-modules-commonjs ^7.4.0
- @babel/plugin-transform-modules-amd ^7.4.0
- @babel/plugin-transform-modules-systemjs ^7.4.0
If you are using Webpack or Rollup and thus don't want
Babel to transpile your imports and exports, you can use
the @babel/plugin-syntax-dynamic-import plugin and let your
bundler handle dynamic imports.
`;
export default declare(api => {
api.assertVersion(7);
return {
name: "transform-dynamic-import",
inherits: USE_ESM
? undefined
: IS_STANDALONE
? undefined
: // eslint-disable-next-line no-restricted-globals
require("@babel/plugin-syntax-dynamic-import").default,
pre() {
// We keep using the old name, for compatibility with older
// version of the CommonJS transform.
this.file.set(
"@babel/plugin-proposal-dynamic-import",
PACKAGE_JSON.version,
);
},
visitor: {
Program() {
const modules = this.file.get("@babel/plugin-transform-modules-*");
if (!SUPPORTED_MODULES.includes(modules)) {
throw new Error(MODULES_NOT_FOUND);
}
},
},
};
});