warn when creating a client without url (#512)

* warn when creating a client without url * convert to throwing an error
urql-graphql · Jan 17, 2020 · 4c75bf7 · 4c75bf7
1 parent cd8ea77
commit 4c75bf7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/client.ts b/src/client.ts
@@ -90,6 +90,9 @@ export class Client {
   activeOperations = Object.create(null) as ActiveOperations;
 
   constructor(opts: ClientOptions) {
+    if (process.env.NODE_ENV !== 'production' && !opts.url) {
+      throw new Error('You are creating an urql-client without a url.');
+    }
     this.url = opts.url;
     this.fetchOptions = opts.fetchOptions;
     this.fetch = opts.fetch;