echarts event 源码
echarts event 代码
文件路径：/src/util/event.ts
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import Element from 'zrender/src/Element';
export function findEventDispatcher(
target: Element,
det: (target: Element) => boolean,
returnFirstMatch?: boolean
) {
let found;
while (target) {
if (det(target)) {
found = target;
if (returnFirstMatch) {
break;
}
}
target = target.__hostTarget || target.parent;
}
return found;
}
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