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app_vue/node_modules/@vue/cli-service/lib/util/targets.js

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+// copied from @vue/babel-preset-app
+
+const { semver } = require('@vue/cli-shared-utils')
+const { default: getTargets } = require('@babel/helper-compilation-targets')
+
+// See the result at <https://github.com/babel/babel/blob/v7.13.15/packages/babel-compat-data/data/native-modules.json>
+const allModuleTargets = getTargets(
+  { esmodules: true },
+  { ignoreBrowserslistConfig: true }
+)
+
+function getIntersectionTargets (targets, constraintTargets) {
+  const intersection = Object.keys(constraintTargets).reduce(
+    (results, browser) => {
+      // exclude the browsers that the user does not need
+      if (!targets[browser]) {
+        return results
+      }
+
+      // if the user-specified version is higher the minimum version that supports esmodule, than use it
+      results[browser] = semver.gt(
+        semver.coerce(constraintTargets[browser]),
+        semver.coerce(targets[browser])
+      )
+        ? constraintTargets[browser]
+        : targets[browser]
+
+      return results
+    },
+    {}
+  )
+
+  return intersection
+}
+
+function getModuleTargets (targets) {
+  // use the intersection of modern mode browsers and user defined targets config
+  return getIntersectionTargets(targets, allModuleTargets)
+}
+
+function doAllTargetsSupportModule (targets) {
+  const browserList = Object.keys(targets)
+
+  return browserList.every(browserName => {
+    if (!allModuleTargets[browserName]) {
+      return false
+    }
+
+    return semver.gte(
+      semver.coerce(targets[browserName]),
+      semver.coerce(allModuleTargets[browserName])
+    )
+  })
+}
+
+// get browserslist targets in current working directory
+const projectTargets = getTargets()
+const projectModuleTargets = getModuleTargets(projectTargets)
+const allProjectTargetsSupportModule = doAllTargetsSupportModule(projectTargets)
+
+module.exports = {
+  getTargets,
+  getModuleTargets,
+  getIntersectionTargets,
+  doAllTargetsSupportModule,
+
+  projectTargets,
+  projectModuleTargets,
+  allProjectTargetsSupportModule
+}