Icon Button

1

import 'package:flutter/material.dart';

IconButton(
  onPressed: () {},
  icon: const Icon(Icons.notifications),
),

2

import 'package:flutter/material.dart';

IconButton.filled(
  onPressed: () {},
  icon: const Icon(Icons.notifications),
),

3

import 'package:flutter/material.dart';

IconButton.filledTonal(
  onPressed: () {},
  icon: const Icon(Icons.notifications),
),

4

import 'package:flutter/material.dart';

IconButton.outlined(
  onPressed: () {},
  icon: const Icon(Icons.notifications),
),

5

import 'package:flutter/material.dart';

const BackButton(),

6

import 'package:flutter/material.dart';

const CloseButton(),

7

import 'package:flutter/material.dart';

const DrawerButton(),