Скачать или смотреть How to Check if a String Contains Specific Words in Puppeteer

Learn how to enhance your Puppeteer script to check if a string contains specific words using JavaScript. This guide explains the solution in a clear and simple way.
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This video is based on the question https://stackoverflow.com/q/67346398/ asked by the user 'robert0' ( https://stackoverflow.com/u/15300645/ ) and on the answer https://stackoverflow.com/a/67347825/ provided by the user 'pavelsaman' ( https://stackoverflow.com/u/10401931/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Check if a String Contains Specific Words in Puppeteer: A Simple Guide

When working with Puppeteer, you might come across scenarios where you need to validate a string before processing it further. For instance, you may want to check if a message contains certain keywords, and based on that, return different results. In this guide, we will explore how to achieve this efficiently using a simple conditional structure.

The Problem

Assume you have a piece of code that scrapes a webpage and retrieves a message along with a username. You want to enhance this code by checking if the retrieved message contains strings like "http" or "https". If it does, the goal is to return an empty message; otherwise, return the original message.

Current Code Example

Here’s the existing code that you have:

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When this code executes, it outputs the following:

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The Solution: Implementing the Check

To implement the desired check, we can introduce a function that will verify if the message contains any unwanted keywords. Here’s how to structure the solution step by step:

Step 1: Define a Function to Check for Keywords

We need a utility function that checks if the message contains specific words. Here’s a simple version of that function:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Modify the grabResult Function

Next, we need to update the grabResult function to utilize the new keyword checking function. Here’s the modified version:

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Step 3: Export the Updated Module

Finally, make sure to export your updated module so it can be used elsewhere in your application:

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How It Works

The containsWords function takes an array of keywords and checks if any of them match the given string (message).

The grabResult function retrieves the message and username from the DOM.

If the message contains "http" or "https", it returns an empty string; otherwise, it returns the original message.

Example Output

When the message equals to "http" or "https", the function will return:

[[See Video to Reveal this Text or Code Snippet]]

If the message does not contain those keywords, it retains the original message:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

This simple enhancement to your Puppeteer code allows you to check for specific words in strings effectively. By following the steps outlined in this guide, you can ensure that your script behaves as expected, returning appropriate results based on the contents of the message.

Happy coding! If you have any further questions or need more clarifications, feel free to ask!