diff --git a/docs/font-inspector.html b/docs/font-inspector.html
index 2dab41be..44a1de92 100644
--- a/docs/font-inspector.html
+++ b/docs/font-inspector.html
@@ -288,6 +288,9 @@ <h1>Free Software</h1>
 }
 
 const form = document.forms.demo;
+const loadScript = (src) => new Promise((onload) => document.documentElement.append(
+  Object.assign(document.createElement('script'), {src, onload})
+));
 async function display(file, name) {
     form.fontname.innerText = name;
     const isWoff2 = name.endsWith('.woff2');