Add js web stuff to landing page + documentation

go/jsruntime/runtime/@solidjs/router/dist/lifecycle.js

@@ -0,0 +1,69 @@
+import { isServer } from "solid-js/web";
+export function createBeforeLeave() {
+    let listeners = new Set();
+    function subscribe(listener) {
+        listeners.add(listener);
+        return () => listeners.delete(listener);
+    }
+    let ignore = false;
+    function confirm(to, options) {
+        if (ignore)
+            return !(ignore = false);
+        const e = {
+            to,
+            options,
+            defaultPrevented: false,
+            preventDefault: () => (e.defaultPrevented = true)
+        };
+        for (const l of listeners)
+            l.listener({
+                ...e,
+                from: l.location,
+                retry: (force) => {
+                    force && (ignore = true);
+                    l.navigate(to, { ...options, resolve: false });
+                }
+            });
+        return !e.defaultPrevented;
+    }
+    return {
+        subscribe,
+        confirm
+    };
+}
+// The following supports browser initiated blocking (eg back/forward)
+let depth;
+export function saveCurrentDepth() {
+    if (!window.history.state || window.history.state._depth == null) {
+        window.history.replaceState({ ...window.history.state, _depth: window.history.length - 1 }, "");
+    }
+    depth = window.history.state._depth;
+}
+if (!isServer) {
+    saveCurrentDepth();
+}
+export function keepDepth(state) {
+    return {
+        ...state,
+        _depth: window.history.state && window.history.state._depth
+    };
+}
+export function notifyIfNotBlocked(notify, block) {
+    let ignore = false;
+    return () => {
+        const prevDepth = depth;
+        saveCurrentDepth();
+        const delta = prevDepth == null ? null : depth - prevDepth;
+        if (ignore) {
+            ignore = false;
+            return;
+        }
+        if (delta && block(delta)) {
+            ignore = true;
+            window.history.go(-delta);
+        }
+        else {
+            notify();
+        }
+    };
+}