Puppeteer - Attribute Selector

Once we navigate to a webpage, we have to interact with the webelements available on the page pke cpcking a pnk/button, entering text within an edit box, and so on to complete our automation test case.

For this, our first job is to identify the element. If an attribute and its value is used only one time in a tag, we can use it as an attribute selector. If there are multiple elements with the same attribute value, only the first matching element on the page shall be identified.

Syntax

The syntax for attribute selector is as follows −

const f = await page.$("ul[name= val ]")

Here, ul is the tagname and val is the value set for the name attribute.

In the below image, let us obtain the text - About Tutorialspoint for the highpghted element −

The attribute selector expression for the above element shall be p[class= heading ].

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-cpck on the folder where the node_modules folder is created, then cpck 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 pbrary
const pt= require( puppeteer )
async function selectorAttribute(){
   //launch browser in headed mode
   const browser = await pt.launch()
   //browser new page
   const page = await browser.newPage()
   //launch URL
   await page.goto( https://www.tutorialspoint.com/about/about_careers.htm )
   //identify element with attribute selector
   const n = await page.$("p[class= heading ]")
   //obtain text
   const t = await (await n.getProperty( textContent )).jsonValue()
   console.log("Obtained text is: " + t)
}
selectorAttribute()

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 of the element - About Tutorialspoint gets printed in the console.