diff --git a/js/asyncSupport b/js/asyncSupport
new file mode 100644
index 0000000..a5490a6
--- /dev/null
+++ b/js/asyncSupport
@@ -0,0 +1,10 @@
+//判断浏览器是否支持Async和Await
+function isAsyncAwaitSupport() {
+    let func;
+    try {
+        eval("func = async function(){};");
+    } catch (e) {
+        return false;
+    }
+   return Object.getPrototypeOf(func).constructor != null;
+}
\ No newline at end of file