初始版本提交

src/utils/event/index.ts

@@ -0,0 +1,42 @@
+import ResizeObserver from 'resize-observer-polyfill';
+
+const isServer = typeof window === 'undefined';
+
+/* istanbul ignore next */
+function resizeHandler(entries: any[]) {
+  for (const entry of entries) {
+    const listeners = entry.target.__resizeListeners__ || [];
+    if (listeners.length) {
+      listeners.forEach((fn: () => any) => {
+        fn();
+      });
+    }
+  }
+}
+
+/* istanbul ignore next */
+export function addResizeListener(element: any, fn: () => any) {
+  if (isServer) return;
+  if (!element.__resizeListeners__) {
+    element.__resizeListeners__ = [];
+    element.__ro__ = new ResizeObserver(resizeHandler);
+    element.__ro__.observe(element);
+  }
+  element.__resizeListeners__.push(fn);
+}
+
+/* istanbul ignore next */
+export function removeResizeListener(element: any, fn: () => any) {
+  if (!element || !element.__resizeListeners__) return;
+  element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);
+  if (!element.__resizeListeners__.length) {
+    element.__ro__.disconnect();
+  }
+}
+
+export function triggerWindowResize() {
+  const event = document.createEvent('HTMLEvents');
+  event.initEvent('resize', true, true);
+  (event as any).eventType = 'message';
+  window.dispatchEvent(event);
+}