javascript - 从新打开的页面 puppeteer 获取标题

Question

我正在尝试获取新标签并使用 puppeteer 抓取该页面的标题。

这是我的

// use puppeteer
const puppeteer = require('puppeteer');

//set wait length in ms: 1000ms = 1sec
const short_wait_ms = 1000

async function run() {
    const browser = await puppeteer.launch({
        headless: false, timeout: 0});
    const page = await browser.newPage();

        await page.goto('https://biologyforfun.wordpress.com/2017/04/03/interpreting-random-effects-in-linear-mixed-effect-models/');

    // second page DOM elements
    const CLICKHERE_SELECTOR = '#post-2068 > div > div.entry-content > p:nth-child(2) > a:nth-child(1)';

    // main page
    await page.waitFor(short_wait_ms);
    await page.click(CLICKHERE_SELECTOR);


    // new tab opens - move to new tab
    let pages = await browser.pages();

    //go to the newly opened page

    //console.log title -- Generalized Linear Mixed Models in Ecology and in R

}

run();

我不知道如何使用 browser.page() 开始处理新页面。

Answer 1

根据Puppeteer Documentation :

page.title()

• returns: <Promise<string>> Returns page's title.

Shortcut for page.mainFrame().title().

因此，您应该使用 page.title()用于获取新打开页面的标题。

或者，您可以通过使用以下方法获得轻微的性能提升:

page._frameManager._mainFrame.evaluate(() => document.title)

Note: Make sure to use the await operator when calling page.title(), as the title tag must be downloaded before Puppeteer can access its content.