Element (<input id="pagenum-input" class="form-control" aria-label="..." value="1" min="1" max="28">)
我想使用max(28)的值作为我在第二个循环中创建的变量max的值。我如何从输入标签到程序获取max的值? 任何帮助,将不胜感激。谢谢!
const puppeteer = require('puppeteer');
async function getPic() {
const browser = await puppeteer.launch({headless: false});
const page = await browser.newPage();
for (let j=2; j<=6; j++) {
await page.setViewport({width: 2000, height: 2500})
await page.goto('http://epaper.freepressjournal.in/');
await page.click('body > div > div.common_section > div > div > div.rw_rightcrousel > div > div:nth-child('+j+') > a > div > img');
await page.waitFor(2000);
await page.click('#left-chunk-1 > img');
var maximum;
for (let i= 1; i<=maximum; i++) {
await page.waitFor(2000);
await page.screenshot({path: '//192.168.2.19/em/automatic downloading/Puppeteer/freepressjournal/'+j+''+i+'.png'});
await page.waitFor(2000);
await page.click('#page-div > a.right_arrow_pgright.btn_next');
}
}
await browser.close();
}
getPic();
// This loop will automatically get the value of max that is 28.
// The value of max will vary according to pages. The program should accept
// the value of max in maximum and run the loop accordingly.
for (let i= 1; i<=maximum; i++)
答案 0 :(得分:0)
您可以借助page.evaluate
函数与页面上的任何元素进行交互。您可以通过以下方法找到感兴趣的输入元素并访问其属性之一:
var maximum = await page.evaluate(() => {
return document.getElementById("pagenum-input").getAttribute("max");
});