Animated.Value and Animated.timing in React Native - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new animated value starting at 0.

React Native

const opacity = new Animated.[1](0);

Drag options to blanks, or click blank then click option'

AValue

Btiming

Cspring

Dsequence

Attempts:

3 left

💡 Hint

Common Mistakes

Using Animated.timing instead of Animated.Value to create the value.

Trying to call Animated.Value as a function without 'new'.

Animated.Value is used to create a new animated value that can be changed over time.

2fill in blank

medium

Complete the code to animate the opacity value to 1 over 500 milliseconds.

React Native

Animated.[1](opacity, { toValue: 1, duration: 500 }).start();

Drag options to blanks, or click blank then click option'

Aspring

Btiming

Cdecay

Dloop

Attempts:

3 left

💡 Hint

Common Mistakes

Using Animated.spring instead of Animated.timing for duration-based animation.

Forgetting to call .start() to begin the animation.

Animated.timing animates a value over time with a duration.

3fill in blank

hard

Fix the error in the code to properly animate the value.

React Native

Animated.timing([1], { toValue: 100, duration: 300 }).start();

Drag options to blanks, or click blank then click option'

Aopacity

B100

Cduration

DAnimated.Value

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a number instead of the animated value.

Passing the string 'duration' or 'Animated.Value' instead of the variable.

The first argument to Animated.timing must be an Animated.Value instance, like 'opacity'.

4fill in blank

hard

Fill both blanks to create an animated style that changes opacity using the animated value.

React Native

const animatedStyle = { opacity: [1] }; 
<View style={ [2] }></View>

Drag options to blanks, or click blank then click option'

Aopacity

BanimatedStyle

C{animatedStyle}

Dstyle

Attempts:

3 left

💡 Hint

Common Mistakes

Wrapping the style variable in extra curly braces like {animatedStyle} in JSX.

Using a string instead of the animated value for opacity.

The opacity style uses the animated value variable, and the style prop receives the animated style object.

5fill in blank

hard

Fill all three blanks to create and start an animation that moves a view horizontally from 0 to 150 over 700ms.

React Native

const translateX = new Animated.[1](0);
Animated.[2](translateX, { toValue: [3], duration: 700 }).start();

Drag options to blanks, or click blank then click option'

AValue

Btiming

C150

D300

Attempts:

3 left

💡 Hint

Common Mistakes

Using Animated.spring instead of Animated.timing.

Setting toValue to 300 instead of 150.

Forgetting to call .start() to begin animation.

Animated.Value creates the animated number, Animated.timing animates it, and toValue sets the target position.