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chrome extension message passing example
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| chrome.runtime.onMessage.addListener( | |
| function(message, sender, sendResponse) { | |
| console.log(`${message} in content1`) | |
| sendResponse(`${message} from content1`) | |
| // setTimeout(() => { | |
| // sendResponse(`${message} from content1`) | |
| // }, 2000) | |
| // | |
| // return true | |
| } | |
| ) |
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| chrome.runtime.onMessage.addListener( | |
| function(message, sender, sendResponse) { | |
| console.log(`${message} in content2`) | |
| sendResponse(`${message} from content2`) | |
| // setTimeout(() => { | |
| // sendResponse(`${message} from content2`) | |
| // }, 3000) | |
| // | |
| // return true | |
| } | |
| ) |
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| { | |
| "name": "Message Passing", | |
| "manifest_version": 2, | |
| "version": "0.1", | |
| "description": "Message Passing Examples", | |
| "browser_action": { | |
| "default_popup": "popup.html" | |
| }, | |
| "content_scripts": [ | |
| { | |
| "matches": ["<all_urls>"], | |
| "js": ["content1.js", "content2.js"] | |
| } | |
| ], | |
| "permissions": [ | |
| "tabs" | |
| ] | |
| } |
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| <body style="width: 300px; height: 200px;"> | |
| <button id="send">Send a message</button> | |
| <div id="result"></div> | |
| <script src="popup.js"></script> | |
| </body> |
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| function appendResult(result) { | |
| document.querySelector('#result').innerHTML += `<p>${result}</p>` | |
| } | |
| function clickHandler(event) { | |
| chrome.tabs.query({ active: true}, tabs => { | |
| chrome.tabs.sendMessage(tabs[0].id, 'hello', result => appendResult(result)) | |
| }) | |
| } | |
| document.querySelector('#send').addEventListener('click', clickHandler) |
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