From b6ad08a18231f6965dae27f6a154ec160b256525 Mon Sep 17 00:00:00 2001
From: Folyd <lyshuhow@gmail.com>
Date: Mon, 8 Aug 2022 21:43:42 +0800
Subject: [PATCH] Only load macro railroad wasm file in macro pages

---
 extension/script/macro-railroad.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/extension/script/macro-railroad.js b/extension/script/macro-railroad.js
index 246969a..1041f71 100644
--- a/extension/script/macro-railroad.js
+++ b/extension/script/macro-railroad.js
@@ -5,10 +5,13 @@ document.addEventListener("DOMContentLoaded", async () => {
 async function load() {
     if (!isRustDoc()) return;
 
+    let macros = document.querySelectorAll('pre.macro');
+    if (!macros || macros.length === 0) return;
+
     await wasm_bindgen(chrome.runtime.getURL('wasm/macro-railroad.wasm'));
     injectCss();
 
-    for (let macro of document.querySelectorAll('pre.macro')) {
+    for (let macro of macros) {
         let parentNode = macro.parentNode;
         if (!parentNode) continue;