babel-polyfill.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var _utils = require("./utils");
const BABEL_POLYFILL_DEPRECATION = `
\`@babel/polyfill\` is deprecated. Please, use required parts of \`core-js\`
and \`regenerator-runtime/runtime\` separately`;
const NO_DIRECT_POLYFILL_IMPORT = `
When setting \`useBuiltIns: 'usage'\`, polyfills are automatically imported when needed.
Please remove the direct import of \`SPECIFIER\` or use \`useBuiltIns: 'entry'\` instead.`;
function _default({
template
}, {
regenerator,
deprecated,
usage
}) {
return {
name: "preset-env/replace-babel-polyfill",
visitor: {
ImportDeclaration(path) {
const src = (0, _utils.getImportSource)(path);
if (usage && (0, _utils.isPolyfillSource)(src)) {
console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
if (!deprecated) path.remove();
} else if (src === "@babel/polyfill") {
if (deprecated) {
console.warn(BABEL_POLYFILL_DEPRECATION);
} else if (regenerator) {
path.replaceWithMultiple(template.ast`
import "core-js";
import "regenerator-runtime/runtime.js";
`);
} else {
path.replaceWith(template.ast`
import "core-js";
`);
}
}
},
Program(path) {
path.get("body").forEach(bodyPath => {
const src = (0, _utils.getRequireSource)(bodyPath);
if (usage && (0, _utils.isPolyfillSource)(src)) {
console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
if (!deprecated) bodyPath.remove();
} else if (src === "@babel/polyfill") {
if (deprecated) {
console.warn(BABEL_POLYFILL_DEPRECATION);
} else if (regenerator) {
bodyPath.replaceWithMultiple(template.ast`
require("core-js");
require("regenerator-runtime/runtime.js");
`);
} else {
bodyPath.replaceWith(template.ast`
require("core-js");
`);
}
}
});
}
}
};
}
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