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app_vue/node_modules/@babel/preset-env/lib/polyfills/babel-polyfill.cjs

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+;
+const {
+  getImportSource,
+  getRequireSource,
+  isPolyfillSource
+} = require("./utils.cjs");
+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.`;
+module.exports = function ({
+  template
+}, {
+  regenerator,
+  deprecated,
+  usage
+}) {
+  return {
+    name: "preset-env/replace-babel-polyfill",
+    visitor: {
+      ImportDeclaration(path) {
+        const src = getImportSource(path);
+        if (usage && 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 = getRequireSource(bodyPath);
+          if (usage && 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");
+              `);
+            }
+          }
+        });
+      }
+    }
+  };
+};
+
+//# sourceMappingURL=babel-polyfill.cjs.map