maybeOf static method

MediaQueryData? maybeOf(
  1. BuildContext context

The data from the closest instance of this class that encloses the given context, if any.

Use this function if you want to allow situations where no MediaQuery is in scope. Prefer using MediaQuery.of in situations where a media query is always expected to exist.

If there is no MediaQuery in scope, then this function will return null.

You can use this function to query the entire set of data held in the current MediaQueryData object. When any of that information changes, your widget will be scheduled to be rebuilt, keeping your widget up-to-date.

Since it is typical that the widget only requires a subset of properties of the MediaQueryData object, prefer using the more specific methods (for example: MediaQuery.maybeSizeOf and MediaQuery.maybePaddingOf), as those methods will not cause a widget to rebuild when unrelated properties are updated.

Typical usage is as follows:

MediaQueryData? mediaQuery = MediaQuery.maybeOf(context);
if (mediaQuery == null) {
  // Do something else instead.

See also:

  • of, which will throw if it doesn't find a MediaQuery ancestor, instead of returning null.
  • maybeSizeOf and other specific methods for retrieving and depending on changes of a specific value.


static MediaQueryData? maybeOf(BuildContext context) {
  return _maybeOf(context);