1 | ;
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2 |
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3 | const babel = require("@babel/core");
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4 |
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5 | module.exports = function injectCaller(opts, target) {
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6 | if (!supportsCallerOption()) return opts;
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7 | return Object.assign({}, opts, {
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8 | caller: Object.assign({
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9 | name: "babel-loader",
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10 | // Provide plugins with insight into webpack target.
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11 | // https://github.com/babel/babel-loader/issues/787
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12 | target,
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13 | // Webpack >= 2 supports ESM and dynamic import.
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14 | supportsStaticESM: true,
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15 | supportsDynamicImport: true,
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16 | // Webpack 5 supports TLA behind a flag. We enable it by default
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17 | // for Babel, and then webpack will throw an error if the experimental
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18 | // flag isn't enabled.
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19 | supportsTopLevelAwait: true
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20 | }, opts.caller)
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21 | });
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22 | }; // TODO: We can remove this eventually, I'm just adding it so that people have
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23 | // a little time to migrate to the newer RCs of @babel/core without getting
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24 | // hard-to-diagnose errors about unknown 'caller' options.
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25 |
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26 |
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27 | let supportsCallerOptionFlag = undefined;
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28 |
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29 | function supportsCallerOption() {
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30 | if (supportsCallerOptionFlag === undefined) {
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31 | try {
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32 | // Rather than try to match the Babel version, we just see if it throws
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33 | // when passed a 'caller' flag, and use that to decide if it is supported.
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34 | babel.loadPartialConfig({
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35 | caller: undefined,
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36 | babelrc: false,
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37 | configFile: false
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38 | });
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39 | supportsCallerOptionFlag = true;
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40 | } catch (err) {
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41 | supportsCallerOptionFlag = false;
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42 | }
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43 | }
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44 |
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45 | return supportsCallerOptionFlag;
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46 | } |
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