selenium webdriver——JS滚动到最底部

JS控制滚动条的位置：

window.scrollTo(x,y);

竖向滚动条置顶 window.scrollTo(0,0);

竖向滚动条置底 window.scrollTo(0,document.body.scrollHeight)

JS控制TextArea滚动条自动滚动到最下部

document.getElementById('textarea').scrollTop = document.getElementById('textarea').scrollHeight

例子：

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.TimeoutException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.Assert;

/**
* @author Hjianhui
* JavaScript.java  2016-08-01 
* 
*/
public class testScroll{

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //利用webdriver键入搜索关键字
        WebDriver driver = new FirefoxDriver();
        try{
            driver.get("http://www.baidu.com");
            
            JavascriptExecutor driver_js= (JavascriptExecutor) driver;
            //利用js代码键入搜索关键字
            driver_js.executeScript("document.getElementById("kw").value="yeetrack"");
            
            driver.findElement(By.id("su")).click();
            
            //等待元素页面加载
            waitForElementToLoad(driver, 10, By.xpath(".//*[@id='1']/h3/a[1]"));
            
            //将页面滚动条拖到底部
            driver_js.executeScript("window.scrollTo(0,document.body.scrollHeight)");
            
            //#将页面滚动条拖到顶部
            driver_js.executeScript("window.scrollTo(0,0)");
            
            
        }catch (Exception e){
            e.printStackTrace();
        }
        driver.quit();    
    }
    
    /**
     * 在给定的时间内去查找元素，如果没找到则超时，抛出异常
     * */
    public static void waitForElementToLoad(WebDriver driver, int timeOut, final By By) {
        try {
            (new WebDriverWait(driver, timeOut)).until(new ExpectedCondition<Boolean>() {

                public Boolean apply(WebDriver driver) {
                    WebElement element = driver.findElement(By);
                    return element.isDisplayed();
                }
            });
        } catch (TimeoutException e) {
            Assert.fail("超时!! " + timeOut + " 秒之后还没找到元素 [" + By + "]");

        }
    }
}

  waitForElementToLoad()函数是为了保证页面元素已加载完成，以便执行JS代码

Python代码

from selenium import  webdriver
from selenium.webdriver.support.wait import WebDriverWait
driver = webdriver.Firefox()
driver.get("http://www.baidu.com")
driver.execute_script("document.getElementById("kw").value="selenium"")
WebDriverWait(driver, 10).until(lambda driver : driver.find_element_by_xpath(".//*[@id='container']/div[2]/div/div[2]"))
driver.execute_script("window.scrollTo(0,document.body.scrollHeight)")
driver.quit()