Stack Explained | Flutter for Web Developers

What’s Stack?

The Stack class is a widget in Flutter that allows you to position its children relative to the edges of its box. It is particularly useful for overlapping multiple children, such as text over an image or a button over a gradient. Important properties include alignment, children, and fit, while methods like createRenderObject and updateRenderObject help manage the rendering process.

Check the official documentation for more.

Stack explained for Web Developers

From a web developer’s perspective, the Stack class can be compared to layering elements in CSS with absolute positioning. Just like in React or Angular where you can position elements using CSS styles, the Stack widget allows for similar control over the layout of its children. However, unlike web APIs that rely on the DOM’s flow, Stack manages its children in a more controlled manner, allowing for complex overlapping layouts without affecting the overall document flow.

Example Code

Here is an example of how to use Stack:

Stack(
  children: [
    Container(
      width: 100,
      height: 100,
      color: Colors.red,
    ),
    Container(
      width: 90,
      height: 90,
      color: Colors.green,
    ),
    Container(
      width: 80,
      height: 80,
      color: Colors.blue,
    ),
  ],
)

Stack Remarks

The Stack class is a powerful tool for Flutter developers, enabling the creation of visually appealing layouts with overlapping elements. By understanding its properties and methods, web developers can leverage their existing knowledge of positioning to create dynamic and engaging user interfaces.