зеркало из https://github.com/electron/electron.git
docs: navigation history example (#42980)
* docs: add fiddle example * docs: add tutorial guide * refactor: PR review comments * refactor: add eof * refactor: render navigation history and make demo better. * refactor: fix broken links * refactor: add eof newline * docs: review feedback :) * chore: lint add space around list * doc: transformURL
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Alice Zhao
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@ -37,6 +37,7 @@ an issue:
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* [Offline/Online Detection](tutorial/online-offline-events.md)
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* [Represented File for macOS BrowserWindows](tutorial/represented-file.md)
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* [Native File Drag & Drop](tutorial/native-file-drag-drop.md)
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* [Navigation History](tutorial/navigation-history.md)
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* [Offscreen Rendering](tutorial/offscreen-rendering.md)
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* [Dark Mode](tutorial/dark-mode.md)
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* [Web embeds in Electron](tutorial/web-embeds.md)
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@ -0,0 +1,32 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>Enhanced Browser with Navigation History</title>
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<link href="styles.css" rel="stylesheet" />
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</head>
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<body>
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<div id="controls">
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<button id="backBtn" title="Go back">Back</button>
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<button id="forwardBtn" title="Go forward">Forward</button>
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<button id="backHistoryBtn" title="Show back history">Back History</button>
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<button id="forwardHistoryBtn" title="Show forward history">Forward History</button>
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<input id="urlInput" type="text" placeholder="Enter URL">
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<button id="goBtn" title="Navigate to URL">Go</button>
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</div>
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<div id="historyPanel" class="history-panel"></div>
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<div id="description">
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<h2>Navigation History Demo</h2>
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<p>This demo showcases Electron's NavigationHistory API functionality.</p>
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<p><strong>Back/Forward:</strong> Navigate through your browsing history.</p>
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<p><strong>Back History/Forward History:</strong> View and select from your browsing history.</p>
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<p><strong>URL Bar:</strong> Enter a URL and click 'Go' or press Enter to navigate.</p>
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</div>
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<script src="renderer.js"></script>
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</body>
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</html>
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@ -0,0 +1,58 @@
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const { app, BrowserWindow, BrowserView, ipcMain } = require('electron')
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const path = require('path')
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function createWindow () {
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const mainWindow = new BrowserWindow({
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width: 1000,
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height: 800,
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webPreferences: {
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preload: path.join(__dirname, 'preload.js'),
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nodeIntegration: false,
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contextIsolation: true
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}
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})
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mainWindow.loadFile('index.html')
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const view = new BrowserView()
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mainWindow.setBrowserView(view)
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view.setBounds({ x: 0, y: 100, width: 1000, height: 800 })
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view.setAutoResize({ width: true, height: true })
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const navigationHistory = view.webContents.navigationHistory
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ipcMain.handle('nav:back', () =>
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navigationHistory.goBack()
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)
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ipcMain.handle('nav:forward', () => {
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navigationHistory.goForward()
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})
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ipcMain.handle('nav:canGoBack', () => navigationHistory.canGoBack())
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ipcMain.handle('nav:canGoForward', () => navigationHistory.canGoForward())
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ipcMain.handle('nav:loadURL', (_, url) =>
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view.webContents.loadURL(url)
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)
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ipcMain.handle('nav:getCurrentURL', () => view.webContents.getURL())
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ipcMain.handle('nav:getHistory', () => {
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return navigationHistory.getAllEntries()
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})
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view.webContents.on('did-navigate', () => {
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mainWindow.webContents.send('nav:updated')
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})
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view.webContents.on('did-navigate-in-page', () => {
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mainWindow.webContents.send('nav:updated')
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})
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}
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app.whenReady().then(createWindow)
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app.on('window-all-closed', () => {
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if (process.platform !== 'darwin') app.quit()
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})
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app.on('activate', () => {
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if (BrowserWindow.getAllWindows().length === 0) createWindow()
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})
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@ -0,0 +1,12 @@
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const { contextBridge, ipcRenderer } = require('electron')
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contextBridge.exposeInMainWorld('electronAPI', {
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goBack: () => ipcRenderer.invoke('nav:back'),
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goForward: () => ipcRenderer.invoke('nav:forward'),
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canGoBack: () => ipcRenderer.invoke('nav:canGoBack'),
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canGoForward: () => ipcRenderer.invoke('nav:canGoForward'),
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loadURL: (url) => ipcRenderer.invoke('nav:loadURL', url),
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getCurrentURL: () => ipcRenderer.invoke('nav:getCurrentURL'),
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getHistory: () => ipcRenderer.invoke('nav:getHistory'),
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onNavigationUpdate: (callback) => ipcRenderer.on('nav:updated', callback)
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})
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@ -0,0 +1,84 @@
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const backBtn = document.getElementById('backBtn')
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const forwardBtn = document.getElementById('forwardBtn')
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const backHistoryBtn = document.getElementById('backHistoryBtn')
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const forwardHistoryBtn = document.getElementById('forwardHistoryBtn')
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const urlInput = document.getElementById('urlInput')
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const goBtn = document.getElementById('goBtn')
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const historyPanel = document.getElementById('historyPanel')
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async function updateButtons () {
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const canGoBack = await window.electronAPI.canGoBack()
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const canGoForward = await window.electronAPI.canGoForward()
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backBtn.disabled = !canGoBack
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backHistoryBtn.disabled = !canGoBack
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forwardBtn.disabled = !canGoForward
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forwardHistoryBtn.disabled = !canGoForward
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}
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async function updateURL () {
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urlInput.value = await window.electronAPI.getCurrentURL()
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}
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function transformURL (url) {
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if (!url.startsWith('http://') && !url.startsWith('https://')) {
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const updatedUrl = 'https://' + url
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return updatedUrl
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}
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return url
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}
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async function navigate (url) {
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const urlInput = transformURL(url)
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await window.electronAPI.loadURL(urlInput)
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}
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async function showHistory (forward = false) {
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const history = await window.electronAPI.getHistory()
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const currentIndex = history.findIndex(entry => entry.url === transformURL(urlInput.value))
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if (!currentIndex) {
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return
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}
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const relevantHistory = forward
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? history.slice(currentIndex + 1)
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: history.slice(0, currentIndex).reverse()
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historyPanel.innerHTML = ''
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relevantHistory.forEach(entry => {
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const div = document.createElement('div')
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div.textContent = `Title: ${entry.title}, URL: ${entry.url}`
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div.onclick = () => navigate(entry.url)
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historyPanel.appendChild(div)
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})
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historyPanel.style.display = 'block'
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}
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backBtn.addEventListener('click', () => window.electronAPI.goBack())
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forwardBtn.addEventListener('click', () => window.electronAPI.goForward())
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backHistoryBtn.addEventListener('click', () => showHistory(false))
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forwardHistoryBtn.addEventListener('click', () => showHistory(true))
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goBtn.addEventListener('click', () => navigate(urlInput.value))
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urlInput.addEventListener('keypress', (e) => {
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if (e.key === 'Enter') {
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navigate(urlInput.value)
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}
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})
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document.addEventListener('click', (e) => {
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if (e.target !== historyPanel && !historyPanel.contains(e.target) &&
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e.target !== backHistoryBtn && e.target !== forwardHistoryBtn) {
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historyPanel.style.display = 'none'
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}
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})
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window.electronAPI.onNavigationUpdate(() => {
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updateButtons()
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updateURL()
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})
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updateButtons()
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body {
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margin: 0;
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font-family: Arial, sans-serif;
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background-color: #f0f0f0;
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}
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#controls {
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display: flex;
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align-items: center;
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padding: 10px;
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background-color: #ffffff;
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border-bottom: 1px solid #ccc;
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}
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button {
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margin-right: 10px;
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padding: 8px 12px;
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font-size: 14px;
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background-color: #4CAF50;
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color: white;
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border: none;
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cursor: pointer;
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transition: background-color 0.3s;
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}
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button:hover {
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background-color: #45a049;
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}
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button:disabled {
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background-color: #cccccc;
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cursor: not-allowed;
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}
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#urlInput {
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flex-grow: 1;
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margin: 0 10px;
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padding: 8px;
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font-size: 14px;
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}
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#historyPanel {
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display: none;
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position: absolute;
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top: 60px;
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left: 10px;
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background: white;
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border: 1px solid #ccc;
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padding: 10px;
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max-height: 300px;
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overflow-y: auto;
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z-index: 1000;
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}
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#historyPanel div {
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cursor: pointer;
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padding: 5px;
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}
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#description {
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background-color: #f0f0f0;
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padding: 10px;
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margin-top: 150px;
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}
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@ -0,0 +1,76 @@
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---
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title: "Navigation History"
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description: "The NavigationHistory API allows you to manage and interact with the browsing history of your Electron application."
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slug: navigation-history
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hide_title: false
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---
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# Navigation History
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## Overview
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The [NavigationHistory](../api/navigation-history.md) class allows you to manage and interact with the browsing history of your Electron application. This powerful feature enables you to create intuitive navigation experiences for your users.
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## Accessing NavigationHistory
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Navigation history is stored per [`WebContents`](../api/web-contents.md) instance. To access a specific instance of the NavigationHistory class, use the WebContents class's [`contents.navigationHistory` instance property](https://www.electronjs.org/docs/latest/api/web-contents#contentsnavigationhistory-readonly).
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```js
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const { BrowserWindow } = require('electron')
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const mainWindow = new BrowserWindow()
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const { navigationHistory } = mainWindow.webContents
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```
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## Navigating through history
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Easily implement back and forward navigation:
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```js @ts-type={navigationHistory:Electron.NavigationHistory}
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// Go back
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if (navigationHistory.canGoBack()) {
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navigationHistory.goBack()
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}
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// Go forward
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if (navigationHistory.canGoForward()) {
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navigationHistory.goForward()
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}
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```
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## Accessing history entries
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Retrieve and display the user's browsing history:
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```js @ts-type={navigationHistory:Electron.NavigationHistory}
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const entries = navigationHistory.getAllEntries()
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entries.forEach((entry) => {
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console.log(`${entry.title}: ${entry.url}`)
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})
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```
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Each navigation entry corresponds to a specific page. The indexing system follows a sequential order:
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- Index 0: Represents the earliest visited page.
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- Index N: Represents the most recent page visited.
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## Navigating to specific entries
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Allow users to jump to any point in their browsing history:
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```js @ts-type={navigationHistory:Electron.NavigationHistory}
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// Navigate to the 5th entry in the history, if the index is valid
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navigationHistory.goToIndex(4)
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// Navigate to the 2nd entry forward from the current position
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if (navigationHistory.canGoToOffset(2)) {
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navigationHistory.goToOffset(2)
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}
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```
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Here's a full example that you can open with Electron Fiddle:
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```fiddle docs/fiddles/features/navigation-history
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```
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