我正在寻找一种处理单击打开新页面的链接的简单方法（例如target =“ _ blank”定位标记）。
此处的句柄表示：
向我们介绍您的环境：
我已经查看了相关问题：
https://github.com/GoogleChrome/puppeteer/issues/386 https://github.com/GoogleChrome/puppeteer/issues/3535 https://github.com/GoogleChrome/puppeteer/issues/978 还有
哪些步骤可以重现该问题？
我已经在下面添加了代码段
我正在尝试：
在单击链接时打开新选项卡，获取新页面的对象。 （链接是动态生成的，捕获href可能不是最优雅的方式）
等待直到新页面加载（超时）。如果您可以使用page.waitForNavigation保持一致性
关闭标签页并返回先前的标签页以继续进行进一步的操作
请提供可重现此问题的代码。
// as referenced here on #386 : https://github.com/GoogleChrome/puppeteer/issues/386#issuecomment-425109457
const getNewPageWhenLoaded = async () => {
return new Promise(x =>
global.browser.on('targetcreated', async target => {
if (target.type() === 'page') {
const newPage = await target.page();
const newPagePromise = new Promise(y =>
newPage.once('domcontentloaded', () => y(newPage))
);
const isPageLoaded = await newPage.evaluate(
() => document.readyState
);
return isPageLoaded.match('complete|interactive')
? x(newPage)
: x(newPagePromise);
}
})
);
};
const newPagePromise = getNewPageWhenLoaded();
await page.click('my-link'); // or just do await page.evaluate(() => window.open('https://www.example.com/'));
const newPage = await newPagePromise;
预期结果是什么？
一种处理新标签的简便且一致的方法
会发生什么？
开发人员必须编写看起来像管道（内部/低级）的命令。
使用waitForTarget可能会简化此过程，但是我无法获得返回正确类型的谓词。这是我的非功能性代码
private async getNewPageWhenLoaded() {
const newTarget = await this._browser.waitForTarget(async (target) => {
const newPage = await target.page();
await newPage.waitForNavigation(this._optionsNavigation);
// const newPagePromise = new Promise(() => newPage.once('load', () => x(newPage)));
return await newPage.evaluate("true");
});
return await newTarget.page();
}
// elsewhere in the code
const newPagePromise = this.getNewPageWhenLoaded();
await resultItem.element.click();
const newPage = <Page>await newPagePromise;
//I get the following error
DevTools listening on ws://127.0.0.1:31984/devtools/browser/bf86648d-d52d-42d8-a392-629bf96211d4
(node:5564) UnhandledPromiseRejectionWarning: Error: Navigation failed because browser has disconnected!
at CDPSession.LifecycleWatcher._eventListeners.helper.addEventListener (<path-to-my-project>\node_modules\puppeteer\lib\FrameManager.js:1181:107)
at CDPSession.emit (events.js:182:13)
at CDPSession._onClosed (<path-to-my-project>\node_modules\puppeteer\lib\Connection.js:231:10)
at Connection._onMessage (<path-to-my-project>\node_modules\puppeteer\lib\Connection.js:103:19)
at WebSocketTransport._ws.addEventListener.event (<path-to-my-project>\node_modules\puppeteer\lib\WebSocketTransport.js:41:24)
at WebSocket.onMessage (<path-to-my-project>\node_modules\ws\lib\event-target.js:120:16)
at WebSocket.emit (events.js:182:13)
at Receiver.receiverOnMessage (<path-to-my-project>\node_modules\ws\lib\websocket.js:741:20)
at Receiver.emit (events.js:182:13)
at Receiver.dataMessage (<path-to-my-project>\node_modules\ws\lib\receiver.js:417:14)
-- ASYNC --
at Frame.<anonymous> (<path-to-my-project>\node_modules\puppeteer\lib\helper.js:144:27)
at Page.waitForNavigation (<path-to-my-project>\node_modules\puppeteer\lib\Page.js:644:49)
at Page.<anonymous> (<path-to-my-project>\node_modules\puppeteer\lib\helper.js:145:23)
at newTarget._browser.waitForTarget (<path-to-my-project>\pageObjects\MyPage.js:104:27)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:5564) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:5564) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:5564) UnhandledPromiseRejectionWarning: TimeoutError: Navigation Timeout Exceeded: 300000ms exceeded
at Promise.then (<path-to-my-project>\node_modules\puppeteer\lib\FrameManager.js:1276:21)
-- ASYNC --
at Frame.<anonymous> (<path-to-my-project>\node_modules\puppeteer\lib\helper.js:144:27)
at Page.waitForNavigation (<path-to-my-project>\node_modules\puppeteer\lib\Page.js:644:49)
at Page.<anonymous> (<path-to-my-project>\node_modules\puppeteer\lib\helper.js:145:23)
at newTarget._browser.waitForTarget (<path-to-my-project>\pageObjects\MyPage.js:104:27)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:5564) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
注意：我在github上创建的问题：https://github.com/GoogleChrome/puppeteer/issues/3718
答案 0 :(得分：3)
首先运行click函数，并删除promise内的“全局”，并声明promise外的浏览器为常量
const browser = await puppeteer.launch();
await page.click('my-link');
const getNewPageWhenLoaded = async () => {
return new Promise(x =>
browser.on('targetcreated', async target => {
if (target.type() === 'page') {
const newPage = await target.page();
const newPagePromise = new Promise(y =>
newPage.once('domcontentloaded', () => y(newPage))
);
const isPageLoaded = await newPage.evaluate(
() => document.readyState
);
return isPageLoaded.match('complete|interactive')
? x(newPage)
: x(newPagePromise);
}
})
);
};
const newPagePromise = getNewPageWhenLoaded();
const newPage = await newPagePromise;