description

# animate method Null safety

1. @SupportedBrowser(SupportedBrowser.CHROME, '36')

Animation animate (

1. Iterable<Map<String, dynamic>> frames,
2. [dynamic timing]

)
@SupportedBrowser(SupportedBrowser.CHROME, '36')

Creates a new AnimationEffect object whose target element is the object on which the method is called, and calls the play() method of the AnimationTimeline object of the document timeline of the node document of the element, passing the newly created AnimationEffect as the argument to the method. Returns an Animation for the effect.

Examples

    var animation = elem.animate([{"opacity": 75}, {"opacity": 0}], 200);

    var animation = elem.animate([
      {"transform": "translate(100px, -100%)"},
      {"transform" : "translate(400px, 500px)"}
    ], 1500);

The `frames` parameter is an Iterable, where the map entries specify CSS animation effects. The `timing` paramter can be a double, representing the number of milliseconds for the transition, or a Map with fields corresponding to those of the `Timing` object.

## Implementation

    @SupportedBrowser(SupportedBrowser.CHROME, '36')
    Animation animate(Iterable<Map<String, dynamic>> frames, [timing]) {
      if (frames is! Iterable || !(frames.every((x) => x is Map))) {
        throw new ArgumentError("The frames parameter should be a List of Maps "
            "with frame information");
      }
      var convertedFrames;
      if (frames is Iterable) {
        convertedFrames = frames.map(convertDartToNative_Dictionary).toList();
      } else {
        convertedFrames = frames;
      }
      var convertedTiming =
          timing is Map ? convertDartToNative_Dictionary(timing) : timing;
      return convertedTiming == null
          ? _animate(convertedFrames)
          : _animate(convertedFrames, convertedTiming);
    }