Syntax for Specifying file path (relative and absolute)

Question

I want to know a way of specifying the path of files. I am currently following:

href="css/lib/bootstrap.css"

I find that some people specify the file location in a different way:

templateUrl: 'lib:components/bootstrap.css'

I am not able to understand how to create/specify custom directories, as mentioned above using lib: or package:.

A brief on creating custom packages in dart would be very helpful.

Answer 1

For absolute path

import 'package:your_app_name/lib/some_dir/some_file.dart';

But skip the lib/, so:

import 'package:your_app_name/some_dir/some_file.dart';