1-1 模拟用户输入,点击

1-1 click-type

var btn = await page.$("#btn") //找到某个元素
await btn.click() //点击事件
await btn.type() //用户输入事件

const puppeteer = require("puppeteer");
const url = "https://www.baidu.com";
(async ()=>{
    const browser = await puppeteer.launch({
        headless:false,  //模拟浏览器行为
        defaultViewport:null, //可视区域最大化
        args: ['--start-maximized'] //浏览器窗口最大化
    });
    const page = await browser.newPage();
    await page.goto(url)
    var input = await page.$("#kw");
    await input.type("hello world")
    var btn = await page.$("#su")
    await btn.click()
})();

var content =  await page.$eval('#su',ele=>ele.value); 
# $eval()获取元素的内容

1-2 模拟键盘回车事件

await page.keyboard.press('Enter');

1-3 处理多个元素

waitForSelector() //等待选择器加载
$$eval() //处理多个元素的内容,获取的是数组

const puppeteer = require("puppeteer");
const url = "http://www.kuwo.cn/search/list?key=你";
(async () => {
    const browser = await puppeteer.launch({
        defaultViewport: null, //可视区域最大化
    });
    const page = await browser.newPage();
    await page.goto(url)
    var input =  await page.$(".search");
    await input.type("大闹天宫");
    await page.keyboard.press('Enter');
    await page.waitForSelector(".search_list>.song_item")
    const list = await page.$$eval(".search_list>.song_item",ele=>{
      return ele.length;
    })
    console.log(list)
})()