Differential D8734 Diff 26515 web/cashtab/extension/src/contentscript.js

Changeset View

Standalone View

				// Insert flag into window object to denote CashTab is available and active as a browser extension
				// Could use a div or other approach for now, but emulate MetaMask this way so it is extensible to other items
				// Try window object approach
				var cashTabInject = document.createElement('script');
				cashTabInject.innerHTML = `window.bitcoinAbc = 'cashtab'`;
				document.head.appendChild(cashTabInject);

				// Process page messages
				// Chrome extensions communicate with web pages through the DOM
				// Page sends a message to itself, chrome extension intercepts it
				var port = chrome.runtime.connect({ name: 'cashtabPort' });
				//console.log(`port: ${JSON.stringify(port)}`);
				//console.log(port);

				window.addEventListener(
				'message',
				function (event) {
				if (typeof event.data.text !== 'undefined') {
				console.log('Message received:');
				console.log(event.data.text);
				}

				// We only accept messages from ourselves
				if (event.source != window) return;

				if (event.data.type && event.data.type == 'FROM_PAGE') {
				console.log(event);
				console.log('Content script received: ' + event.data.text);
				port.postMessage(event.data);
				}
				},
				false,
				);