Puppeteer 简明教程
Puppeteer - Keyboard Simulation
Puppeteer 可以执行键盘模拟操作，如按下键盘上的键、按下向上键、向下键等等。所有这些都是使用键盘方法完成的。
Puppeteer can perform keyboard simulation actions like pressing a key in the keyboard, pressing the up, down keys, and so on. All these are done using the keyboard method.
Keyboard Methods
以下是一些键盘方法：
Some of the keyboard methods are as follows −
keyboard.press()
此方法用于模拟按键。要按下的键作为参数传递给此方法。
This method is used to simulate a key press. The key to be pressed is passed as a parameter to this method.
其语法如下：
The syntax is as follows −
Syntax
Syntax
keyboard.press('Enter')keyboard.type()
此方法用于模拟从键盘输入文本。要输入的文本作为参数传递给此方法。
This method is used to simulate entering text from the keyboard. The text to be entered is passed as a parameter to this method.
其语法如下：
The syntax is as follows −
Syntax
Syntax
keyboard.type('Puppeteer')keyboard.sendCharacter()
它与キーボード.类型（）相同。
It is same as keyboard.type().
其语法如下：
The syntax is as follows −
Syntax
Syntax
keyboard.sendCharacter('Puppeteer')keyboard.up()
这种方法用于模拟从键盘按下向上箭头。
This method is used to simulate pressing the up arrow from the keyboard.
其语法如下：
The syntax is as follows −
Syntax
Syntax
keyboard.up()keyboard.down()
这种方法用于模拟从键盘按下向下箭头。
This method is used to simulate pressing the down arrow from the keyboard.
其语法如下：
The syntax is as follows −
Syntax
Syntax
keyboard.down()
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.
Step 2 - 输入文件名，如 testcase1.js。
Step 2 − Enter a filename, say 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.
//Puppeteer library
const pt= require('puppeteer')
async function keyboradSimulation(){
//launch browser in headless mode
const browser = await pt.launch()
//browser new page
const page = await browser.newPage()
//launch URL
await page.goto('https://www.tutorialspoint.com/index.htm')
//identify edit box with id
const f = await page.$("#gsc-i-id1")
//enter text
f.type("Puppeteer")
//wait for sometime
await page.waitForTimeout(4000)
//press Enter
await page.keyboard.press('Enter')
//wait for sometime
await page.waitForTimeout(4000)
//identify element
const t = await page.$(".gsc-result-info")
//obtain text
const text = await (await t.getProperty('textContent')).jsonValue()
console.log("Text is: " + text)
}
keyboradSimulation()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
在命令成功执行后，在输入 Puppeteer - About 39 results (0.15 seconds) 后按 Enter 获得的文本将打印在控制台中。
After the command has been successfully executed, the text obtained on pressing Enter after entering Puppeteer - About 39 results (0.15 seconds) gets printed in the console.