wip: add router

packages/router/src/utils.rs

@@ -0,0 +1,31 @@
+use wasm_bindgen::JsCast;
+use web_sys::window;
+
+pub fn fetch_base_url() -> Option<String> {
+    match window()
+        .unwrap()
+        .document()
+        .unwrap()
+        .query_selector("base[href]")
+    {
+        Ok(Some(base)) => {
+            let base = JsCast::unchecked_into::<web_sys::HtmlBaseElement>(base).href();
+
+            let url = web_sys::Url::new(&base).unwrap();
+            let base = url.pathname();
+
+            let base = if base != "/" {
+                strip_slash_suffix(&base)
+            } else {
+                return None;
+            };
+
+            Some(base.to_string())
+        }
+        _ => None,
+    }
+}
+
+pub(crate) fn strip_slash_suffix(path: &str) -> &str {
+    path.strip_suffix('/').unwrap_or(path)
+}