Puppeteer - Keyboard Simulation

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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

Some of the keyboard methods are as follows −

keyboard.press()

This method is used to simulate a key press. The key to be pressed is passed as a parameter to this method.

The syntax is as follows −

Syntax

keyboard.press('Enter')

keyboard.type()

This method is used to simulate entering text from the keyboard. The text to be entered is passed as a parameter to this method.

The syntax is as follows −

Syntax

keyboard.type('Puppeteer')

keyboard.sendCharacter()

It is same as keyboard.type().

The syntax is as follows −

Syntax

keyboard.sendCharacter('Puppeteer')

keyboard.up()

This method is used to simulate pressing the up arrow from the keyboard.

The syntax is as follows −

Syntax

keyboard.up()

keyboard.down()

This method is used to simulate pressing the down arrow from the keyboard.

The syntax is as follows −

Syntax

keyboard.down()

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

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).

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

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

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

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 − Execute the code with the command given below −

node <filename>

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

node testcase1.js

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.