The code you provided seems to be a mix of JavaScript and Dart code. To use an external JavaScript library in a Flutter web app, you can add a script tag to the HTML file where the library is located. Here's an example:
-
First, download the pica.min.js file and add it to your project's assets folder.
-
Then, in the index.html file located in the web directory of your Flutter project, add a script tag to load the external library:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>My App</title>
</head>
<body>
<!-- add this script tag to load the external library -->
<script src="assets/pica.min.js"></script>
<script src="main.dart.js" type="application/javascript"></script>
</body>
</html>
- Finally, in your Dart code, you can use the js.context.callMethod method to call the resizeBuffer function from the external library:
import 'dart:js' as js;
dynamic resize(Map<String, dynamic> param) {
final src = param['src'];
final toWidth = param['toWidth'];
// call the function in the external library using js.context.callMethod
return js.context.callMethod('resizeBuffer', [js.JsObject.jsify({
'src': src,
'toWidth': toWidth,
})]);
}
This code should allow you to call the resize function from your Dart code and invoke the resizeBuffer function from the external pica.min.js library.
