《最新出炉》系列入门篇-Python+Playwright自动化测试-46-鼠标滚轮操作

1.简介

有些网站为了节省流量和资源，提高加载效率，采用的是动态加载（懒加载）的，也就是当拖动页面右侧滚动条后会自动加载网页下面的内容，不拖动就不会加载的或者通过鼠标滚轮操作。

2.wheel模拟鼠标滚动

wheel模拟鼠标滚动，就是通过调度一个wheel事件。（滚轮事件如果不处理可能会导致滚动，该方法不会等待滚动结束才返回。）语法如下：

    def wheel(self, delta_x: float, delta_y: float) -> None:
        """Mouse.wheel

        Dispatches a `wheel` event.

        **NOTE** Wheel events may cause scrolling if they are not handled, and this method does not wait for the scrolling
        to finish before returning.

        Parameters
        ----------
        delta_x : float
            Pixels to scroll horizontally.
        delta_y : float
            Pixels to scroll vertically.
        """

2.1参数详解

参数	类型	释义
delta_x	float	要水平滚动的像素
delta_y	float	要垂直滚动的像素

2.2使用方法

mouse.wheel(delta_x, delta_y)

3.项目实战

宏哥这里就用菜鸟教程的网站进行讲解和演示：一边滚动一边加载网页内容。

3.1代码设计

3.2参考代码

# coding=utf-8🔥

# 1.先设置编码，utf-8可支持中英文，如上，一般放在第一行

# 2.注释：包括记录创建时间，创建人，项目名称。
'''
Created on 2023-12-16
@author: 北京-宏哥
公众号：北京宏哥
Project: 《最新出炉》系列入门篇-Python+Playwright自动化测试-45-鼠标滚轮操作
'''

# 3.导入模块
from playwright.sync_api import Playwright, sync_playwright, expect

def run(playwright: Playwright) -> None:

    browser = playwright.chromium.launch(headless=False)
    context = browser.new_context()
    page = context.new_page()
    page.goto("https://www.runoob.com/")
    page.wait_for_timeout(1000)
    for i in range(50):
        page.mouse.wheel(0, 100)
        page.wait_for_timeout(500)
    #page.pause()
    context.close()
    browser.close()

with sync_playwright() as playwright:
    run(playwright)