How to Capture console.log Output in Flutter WebView

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The Problem

Your existing JavaScript code might look something like this:

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

Your Current Flutter WebView Setup

Here’s how your initial Flutter WebView setup appears:

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

From the above structure, it’s clear that all output is being directed to the console, but you need it in a format accessible within your app.

The Solution

Step 1: Modify Your JavaScript

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

This change sends the variable directly to Flutter instead of logging it in the console.

Step 2: Update Your Flutter WebView

You need to set up a JavascriptChannel in your Flutter WebView that can receive messages from the JavaScript code. Here’s how you can do this:

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

Step 3: Utilizing the Received Data

Once you receive the message in your onMessageReceived callback, you can implement further logic based on the received message. For example, you could navigate the user to a different page or display an alert based on the output.

Sample Logic Implementation

Within the onMessageReceived function, various actions can be taken depending on the message received. For instance:

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

Conclusion

With these modifications, your Flutter app will be more interactive and responsive, enabling smoother user experiences.

If you have any questions or further improvements, feel free to leave a comment below!