By default, Puppeteer executes the test in headless Chromium. This means if we are running a test using Puppeteer, then we won”t be able to view the execution in the browser.

To enable execution in the headed mode, we have to add the parameter: headless:false in the code.

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.

//adding Puppeteer library
const pt = require(''puppeteer'');
//adding headless flag to false
pt.launch({headless:false}).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/about/about_careers.htm'');
})

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

node <filename>

So in our example, we shall run the below mentioned command −

node testcase1.js

After the command has been successfully executed, we shall see the execution getting triggered in a headed mode.