如何获得剧作家的元素集合? [英] How to get a collection of elements with playwright?

问题描述

如何获取剧作家页面上的所有图像?我只能通过以下代码获得一个 (ElementHandle)，但不能获得一个集合.

How to get all images on the page with playwright? I'm able to get only one (ElementHandle) with following code, but not a collection.

const { chromium } = require("playwright");

class Parser {
  async parse(url) {
    const browser = await chromium.launch();
    const page = await browser.newPage();
    await page.goto(url);
    await page.waitFor("img");
    // TODO: get somehow collection of elements
    return await page.$("img");
  }
}

module.exports = Parser;

在很远的另一个模块的某处:

Somewhere in another module far far away:

const Parser = require("./path/to/dir/Parser.js");
const parser = new Parser();

parser
    .parse(body.url)
    .then(elemHandle => {
      // here I get only one ElementHandle object, but suppose to get an array or collection
    })
    .catch(err => {
      throw new Error(err);
    });

节点 v.12.16.1

Node v.12.16.1

推荐答案

我已经找到了答案.需要使用 page.$$(selector) 而不是 page.$(selector) 来抓取，就像 document.querySelectorAll(selector).

I have already found the answer. Need to use page.$$(selector) instead of page.$(selector) to grab like document.querySelectorAll(selector).

这篇关于如何获得剧作家的元素集合?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！