init

.svn/pristine/5d/5d91b3459105e766d51f7811f0609996ba0118fb.svn-base

@@ -0,0 +1,62 @@
+/**
+ * 获取 top 属性值
+ * <p>
+ * @param elem dom
+ * */
+export function getTop(elem: any): any {
+  return (
+    elem.offsetTop + ((elem.offsetParent && getTop(elem.offsetParent)) || 0)
+  );
+}
+
+/**
+ * 获取 left 属性值
+ * <p>
+ * @param elem dom
+ * */
+export function getLeft(elem: any): any {
+  return (
+    elem.offsetLeft + ((elem.offsetParent && getLeft(elem.offsetParent)) || 0)
+  );
+}
+
+/**
+ * 事件绑定
+ * <p>
+ * @param elem dom
+ * @param events 事件
+ * @param handler 事件回调
+ * */
+export function on(elem: any, events: any, handler: any) {
+  []
+    .concat(events)
+    .forEach((event) => elem.addEventListener(event, handler, false));
+}
+
+/**
+ * 单次事件
+ * <p>
+ * @param elem dom
+ * @param events 事件
+ * @param handler 事件回调
+ * */
+export function once(elem: any, events: any, handler: any) {
+  const listener = function (_this: any, args: any) {
+    handler.apply(_this, args);
+    off(elem, events, listener);
+  };
+  on(elem, events, listener);
+}
+
+/**
+ * 事件解除
+ * <p>
+ * @param elem dom
+ * @param events 事件
+ * @param handler 事件回调
+ * */
+export function off(elem: any, events: any, handler: any) {
+  []
+    .concat(events)
+    .forEach((event) => elem.removeEventListener(event, handler, false));
+}