40 lines
1.2 KiB
TypeScript
40 lines
1.2 KiB
TypeScript
// Copyright 2019-2021 @polkadot/extension authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Message } from '@polkadot/extension-base/types';
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import { PORT_CONTENT } from '@polkadot/extension-base/defaults';
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import chrome from '@polkadot/extension-inject/chrome';
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// connect to the extension
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const port = chrome.runtime.connect({ name: PORT_CONTENT });
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// send any messages from the extension back to the page
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port.onMessage.addListener((data): void => {
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window.postMessage({ ...data, origin: 'content' }, '*');
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});
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// all messages from the page, pass them to the extension
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window.addEventListener('message', ({ data, source }: Message): void => {
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// only allow messages from our window, by the inject
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if (source !== window || data.origin !== 'page') {
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return;
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}
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port.postMessage(data);
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});
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// inject our data injector
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const script = document.createElement('script');
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script.src = chrome.extension.getURL('page.js');
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script.onload = (): void => {
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// remove the injecting tag when loaded
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if (script.parentNode) {
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script.parentNode.removeChild(script);
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}
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};
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(document.head || document.documentElement).appendChild(script);
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