error when no targets option is passed

2016-10-12 22:07:14 -04:00 · 2016-10-12 22:07:14 -04:00 · 208e0ed4a4
commit 208e0ed4a4
parent 15f05c0e9e
1 changed files with 16 additions and 0 deletions
--- a/experimental/babel-preset-env/src/index.js
+++ b/experimental/babel-preset-env/src/index.js
@ -117,6 +117,22 @@ export const validateModulesOption = (modulesOpt = "commonjs") => {
 };

 export default function buildPreset(context, opts) {
+  if (!opts.targets) {
+    throw new Error(
+`
+babel-preset-env requires a "targets" option:
+{
+  "presets": [
+    ["env", {
+      "targets": {
+        "chrome": 50
+      }
+    }]
+  ]
+}
+`);
+  }
+
  const loose = validateLooseOption(opts.loose);
  const moduleType = validateModulesOption(opts.modules);
  const targets = getTargets(opts.targets);