Add A Prefix To Every Line In A Multiline Text Input In Flutter?

I wanted to know if there was a way of adding a prefix (like '- ') to every line in a multiline Text Input in Flutter. For example: Hello World! Would become: -Hello -World! This i

Solution 1:

U can add a - everytime a new line is created.

Add this in your initState(),

final prefix = '-';
_elementsContoller.addListener(() {
  if(_elementsController.text.endsWith('\n')) {
    // Add the prefix everytime a new line is created
    _elementsController.text +=  prefix;
  }
}

If these changes should be made after the input,

text.replaceAll('\n', '\n$prefix');