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28 lines
970 B
JavaScript
28 lines
970 B
JavaScript
/*
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* Copyright 2022 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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function sendPing() {
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chrome.runtime.sendMessage({ command: "ping" });
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}
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function listener(message) {
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if (message.command === "pong") {
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setTimeout(sendPing, 2000);
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} else if (message.command === "quitPingPong") {
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chrome.runtime.onMessage.removeListener(listener);
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}
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}
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chrome.runtime.onMessage.addListener(listener);
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sendPing(); |