添加静止弹幕

packages/artplayer-plugin-danmuku/src/utils.js

@@ -0,0 +1,8 @@
+export function filter(queue, state, callback) {
+    return queue.filter(danmu => danmu.$state === state).map(callback);
+}
+
+export function getRect(ref, key) {
+    const result = ref.getBoundingClientRect();
+    return key ? result[key] : result;
+}