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node_modules/@vue/cli-service/lib/util/resolveLoaderError.js

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+const { chalk } = require('@vue/cli-shared-utils')
+
+const rules = [
+  {
+    type: 'cant-resolve-loader',
+    re: /Can't resolve '(.*loader)'/,
+    msg: (e, match) => (
+      `Failed to resolve loader: ${chalk.yellow(match[1])}\n` +
+      `You may need to install it.`
+    )
+  }
+]
+
+exports.transformer = error => {
+  if (error.webpackError) {
+    const message = typeof error.webpackError === 'string'
+      ? error.webpackError
+      : error.webpackError.message || ''
+    for (const { re, msg, type } of rules) {
+      const match = message.match(re)
+      if (match) {
+        return Object.assign({}, error, {
+          // type is necessary to avoid being printed as default error
+          // by friendly-error-webpack-plugin
+          type,
+          shortMessage: msg(error, match)
+        })
+      }
+    }
+    // no match, unknown webpack error without a message.
+    // friendly-error-webpack-plugin fails to handle this.
+    if (!error.message) {
+      return Object.assign({}, error, {
+        type: 'unknown-webpack-error',
+        shortMessage: message
+      })
+    }
+  }
+  return error
+}
+
+exports.formatter = errors => {
+  errors = errors.filter(e => e.shortMessage)
+  if (errors.length) {
+    return errors.map(e => e.shortMessage)
+  }
+}