Fix Tinter.setTheme to not fire using Firefox

MTRNord · web-flow · commit 58de839621b6 · 2018-05-31T22:32:29.000+02:00
This if checks if we got a Firefox using a variable that is undefined everywhere except in Firefox. In Firefox because of how it renders the DOM ensure that css is always loaded before it loads/runs the js code. Therefor onload 1. never triggers and 2. we can just call setTheme.
diff --git a/src/vector/index.js b/src/vector/index.js
@@ -313,9 +313,13 @@ async function loadApp() {
                 // FIXME: we should probably block loading the app or even
                 // showing a spinner until the theme is loaded, to avoid
                 // flashes of unstyled content.
-                a.onload = () => {
+                if (typeof InstallTrigger !== 'undefined') {
                     Tinter.setTheme(theme);
-                };
+                } else {
+                    a.onload = () => {
+                        Tinter.setTheme(theme);
+                    };
+                }
             } else {
                 // Firefox requires this to not be done via `setAttribute`
                 // or via HTML.
