1 /*
2 * Copyright (c) 2002-2025 Gargoyle Software Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 * https://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 package org.htmlunit;
16
17 import java.io.Serializable;
18
19 /**
20 * A handler for <code>onbeforeunload</code> events.
21 *
22 * @author Ahmed Ashour
23 * @author Ronald Brill
24 */
25 public interface OnbeforeunloadHandler extends Serializable {
26
27 /**
28 * Handles an <code>onbeforeunload</code> event for the specified page.
29 * @param page the page on which the event occurred
30 * @param returnValue the event's <code>returnValue</code>
31 * @return {@code true} to accept the event, {@code false} otherwise
32 */
33 boolean handleEvent(Page page, String returnValue);
34 }