initial commit

src/utils.js

@@ -0,0 +1,38 @@
+export let last_update = Date.now();
+
+export function calc_delta_time()
+{
+    let now = Date.now();
+    let dt = (now - last_update) / 1e3;
+    dt = Math.min(dt, 0.016);
+    last_update = now;
+    return dt;
+}
+
+export function event_listener_array(whos, event_names, callback, options = null)
+{
+    if (!Array.isArray(whos))
+    {
+        whos = [whos];
+    }
+    for (const name of event_names)
+    {
+        for (const who of whos)
+        {
+            who.addEventListener(name, callback, options);
+        }
+    }
+}
+
+export async function import_js_as_module(url)
+{
+    return new Promise((resole, reject) =>
+    {
+        const body = document.getElementsByTagName('body')[0];
+        const script = document.createElement('script');
+        script.type = 'module';
+        script.src = url;
+        script.onload = resole;
+        body.appendChild(script);
+    });
+}