diff --git a/dbus-vis/preload.js b/dbus-vis/preload.js
new file mode 100644
index 0000000..fe6bb56
--- /dev/null
+++ b/dbus-vis/preload.js
@@ -0,0 +1,17 @@
+// All of the Node.js APIs are available in the preload process.
+// It has the same sandbox as a Chrome extension.
+
+const dialog = require('electron').remote.dialog;  // Must add "remote"
+
+window.addEventListener('DOMContentLoaded', () => {
+  const replaceText = (selector, text) => {
+    const element = document.getElementById(selector);
+    if (element) element.innerText = text;
+  };
+
+  for (const type of ['chrome', 'node', 'electron']) {
+    replaceText(`${type}-version`, process.versions[type]);
+  }
+})
+
+console.log(document.getElementById('btn_open_file'));