Add some helpful wrapper around web_sys

emigui_wasm/Cargo.toml

@@ -18,10 +18,12 @@ emigui = { path = "../emigui" }
 [dependencies.web-sys]
 version = "0.3"
 features = [
+  'console',
   'Document',
   'Element',
   'HtmlCanvasElement',
   'Performance',
+  'Storage',
   'WebGlBuffer',
   'WebGlProgram',
   'WebGlRenderingContext',

emigui_wasm/src/lib.rs

@@ -5,3 +5,35 @@ extern crate wasm_bindgen;
 extern crate emigui;
 
 pub mod webgl;
+
+// ----------------------------------------------------------------------------
+// Helpers to hide some of the verbosity of web_sys
+
+pub fn console_log(s: String) {
+    web_sys::console::log_1(&s.into());
+}
+
+pub fn now_sec() -> f64 {
+    web_sys::window()
+        .expect("should have a Window")
+        .performance()
+        .expect("should have a Performance")
+        .now()
+        / 1000.0
+}
+
+pub fn local_storage() -> Option<web_sys::Storage> {
+    web_sys::window()?.local_storage().ok()?
+}
+
+pub fn local_storage_get(key: &str) -> Option<String> {
+    local_storage().map(|storage| storage.get_item(key).ok())??
+}
+
+pub fn local_storage_set(key: &str, value: &str) {
+    local_storage().map(|storage| storage.set_item(key, value));
+}
+
+pub fn local_storage_remove(key: &str) {
+    local_storage().map(|storage| storage.remove_item(key));
+}