Created
July 14, 2020 16:37
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript"> | |
| (() => { | |
| const byId = id => document.getElementById(id) | |
| const post = name => window.electron.ipcRenderer.send(name) | |
| window.onload = () => { | |
| const btnCreate = byId('create') | |
| byId('heap-snapshot').onclick = () => { post('heap-snapshot') } | |
| byId('open-wv-devtools').onclick = () => { post('wv-devtools') } | |
| } | |
| })() | |
| </script> | |
| </head> | |
| <body> | |
| <div> | |
| <h1>Main Window</h1> | |
| <button id="heap-snapshot">save heap snapshot</button> | |
| <button id="open-wv-devtools">open webview devtools</button> | |
| <webview src="https://office.com/" style="height: 600px; border: 1px solid gray;" preload="./preload.js" webpreferences="nativeWindowOpen=yes, sandbox=yes" /> | |
| </div> | |
| </body> | |
| </html> |
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| const { app, BrowserWindow, webContents, ipcMain } = require('electron') | |
| const path = require('path') | |
| const { statSync } = require('fs') | |
| let webViewWC = {} | |
| let mainWindow = null | |
| const createWindow = () => { | |
| mainWindow = new BrowserWindow({ | |
| width: 800, | |
| height: 600, | |
| webPreferences: { | |
| webSecurity: false, | |
| sandbox: true, | |
| nativeWindowOpen: true, | |
| additionalArguments: ['--foobar'], | |
| preload: path.join(__dirname, './preload.js'), | |
| webviewTag: true | |
| } | |
| }) | |
| mainWindow.loadURL(`file://${__dirname}/main.html`) | |
| mainWindow.on('closed', () => mainWindow = null) | |
| mainWindow.webContents.on('did-attach-webview', (e, webContents) => { | |
| ipcMain.on('wv-devtools', () => { webContents.openDevTools() }) | |
| ipcMain.on('heap-snapshot', () => { | |
| webViewFilePath = path.join(__dirname, `/webview-snap.heapsnapshot`) | |
| const start = Date.now() | |
| console.log('Taking V8 HeapSnapshot') | |
| webContents.takeHeapSnapshot(webViewFilePath) | |
| .then(() => { | |
| const stats = statSync(webViewFilePath) | |
| const fileSizeInMegabytes = stats["size"] / 1000000 | |
| console.log(`WebView V8 HeapSnapshot taken successfully, size: ${fileSizeInMegabytes}MB, execution time: ${((Date.now() - start)/1000).toString()}`) | |
| }) | |
| .catch(err => { console.log(err) }) | |
| }) | |
| }) | |
| }; | |
| app.on('ready', createWindow) | |
| app.on('window-all-closed', () => process.platform !== 'darwin' && app.quit()) | |
| app.on('activate', () => mainWindow === null && createWindow()) |
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| { | |
| "main": "main.js" | |
| } |
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| window.electron = { | |
| ipcRenderer: require('electron').ipcRenderer, | |
| webFrame: require('electron').webFrame | |
| } |
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