Add workaround for minification quirk in Metro Bundler (#737)

urql-graphql · Apr 22, 2020 · 67db164 · 67db164
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diff --git a/.changeset/afraid-flies-matter.md b/.changeset/afraid-flies-matter.md
@@ -0,0 +1,5 @@
+---
+'@urql/core': patch
+---
+
+Hoist variables in unminified build output for Metro Bundler builds which otherwise fails for `process.env.NODE_ENV` if-clauses.
diff --git a/scripts/rollup/plugins.js b/scripts/rollup/plugins.js
@@ -112,6 +112,9 @@ const terserPretty = terser({
   keep_fnames: true,
   ie8: false,
   compress: {
+    // We need to hoist vars for process.env.NODE_ENV if-clauses for Metro:
+    hoist_vars: true,
+    hoist_funs: true,
     pure_getters: true,
     toplevel: true,
     booleans_as_integers: false,