Puppeteer 简明教程

Puppeteer - Basic Commands

下面列出了一些 Puppeteer 的基本命令 −

Some of the basic commands of Puppeteer are listed below −

title()

此命令用于获取当前页面的标题。

This command is used to obtain the title of the present page.

Syntax

其语法如下：

The syntax is as follows −

await page.title()

url()

此命令用于获取浏览器中当前启动的应用程序的 URL。

This command is used to obtain the URL of the application currently launched in the browser.

Syntax

其语法如下：

The syntax is as follows −

await page.url()

content()

此命令用于获取页面源代码。

This command is used to obtain the page source code.

Syntax

其语法如下：

The syntax is as follows −

await page.content()

首先，按照人偶基本测试章节执行步骤 1 至 2，如下所示 -

To begin, follow Steps 1 to 2 from the Chapter of Basic Test on Puppeteer which are as follows −

Step 1 - 在创建 node_modules 文件夹的目录中创建一个新文件（人偶和人偶核已安装的位置）。

Step 1 − Create a new file within the directory where the node_modules folder is created (location where the Puppeteer and Puppeteer core have been installed).

人偶安装的详情在人偶安装篇章中进行了讨论。

The details on Puppeteer installation is discussed in the Chapter of Puppeteer Installation.

右击创建 node_modules 文件夹的文件夹，然后点击新建文件按钮。

Right-click on the folder where the node_modules folder is created, then click on the New file button.

node modules

Step 2 - 输入文件名，如 testcase1.js。

Step 2 − Enter a filename, say testcase1.js.

testcase1 js

Step 3 - 将以下代码添加到新创建的 testcase1.js 文件中。

Step 3 − Add the below code within the testcase1.js file created.

//adding Puppeteer library
const pt = require('puppeteer');
pt.launch().then(async browser => {
   //browser new page
   const p = await browser.newPage();
   //set viewpoint of browser page
   await p.setViewport({ width: 1000, height: 500 })
   //launch URL
   await p.goto('https://www.tutorialspoint.com/questions/index.php')
   //obtain page title
   console.log("Page title: " + await p.title())
   //obtain URL
   console.log("Url: " + await p.url())
   //browser close
   await browser.close()
})

Step 4 - 使用以下命令执行代码 -

Step 4 − Execute the code with the command given below −

node <filename>

因此，在我们的示例中，我们将运行以下命令 -

So in our example, we shall run the following command −

node testcase1.js
terminal

成功执行命令后，页面标题——最佳技术问题和答案被打印在控制台中。此外，URL—— www.tutorialspoint.com/questions/index.php 被打印在控制台中。执行已在无头模式下进行。

After the command has been successfully executed, the page title - The Best Technical Questions and Answers gets printed in the console. Also, the URL - www.tutorialspoint.com/questions/index.php gets printed in the console. The execution has happened in the headless mode.