From 16a60a333f1ab13e8dec084428e2abbe2b4eab75 Mon Sep 17 00:00:00 2001
From: Drew Vogel <dvogel@github>
Date: Sun, 23 Feb 2020 09:49:30 -0500
Subject: [PATCH] Fix: avoid prime worker message spam.

The prime worker can receive messages posted by browser extensions (e.g.
react-devtools-bridge). Since the message lacked the necessary inputs,
the prime algorithm would start but never terminate.
---
 lib/prime.worker.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/prime.worker.js b/lib/prime.worker.js
index ce1355d9a..e474fe49c 100644
--- a/lib/prime.worker.js
+++ b/lib/prime.worker.js
@@ -19,8 +19,10 @@ var BIG_TWO = new BigInteger(null);
 BIG_TWO.fromInt(2);
 
 self.addEventListener('message', function(e) {
-  var result = findPrime(e.data);
-  self.postMessage(result);
+  if (e.data.hex && e.data.workLoad) {
+    var result = findPrime(e.data);
+    self.postMessage(result);
+  }
 });
 
 // start receiving ranges to check