Why animations create fluid experiences in React Native - Test Your Understanding

Practice - 5 Tasks

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easy

Complete the code to import the Animated library in React Native.

React Native

import [1] from 'react-native';

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AAnimate

BAnimation

CAnimated

DAnim

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Animation' or 'Animate' which are incorrect module names.

The Animated module is the correct import to create animations in React Native.

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medium

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

React Native

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

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AValue

BTiming

CValueXY

DSpring

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ValueXY' which is for 2D values, or animation types like 'Timing' or 'Spring'.

Animated.Value creates a single animated value starting at the given number.

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hard

Fix the error in the animation start code by filling the missing method name.

React Native

Animated.timing(fadeAnim, { toValue: 1, duration: 500 }).[1]();

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Astart

Bbegin

Crun

Danimate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'begin' or 'run' which are not valid methods.

The start() method begins the animation.

4fill in blank

hard

Fill both blanks to create a style that uses the animated opacity value.

React Native

const animatedStyle = { opacity: fadeAnim[1] }; // Use [2] to get the value

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A.interpolate()

B.__getValue()

C.__getValue

D.getValue()

Attempts:

3 left

💡 Hint

Common Mistakes

Using private or incorrect method names like '__getValue' or missing parentheses.

The getValue() method returns the current numeric value of the animated value.

5fill in blank

hard

Fill all three blanks to create a fade-in animation using useEffect and Animated.timing.

React Native

useEffect(() => {
  Animated.timing([1], {
    toValue: [2],
    duration: [3]
  }).start();
}, []);

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AfadeAnim

B1

C500

Dopacity

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names or wrong duration values.

We animate the fadeAnim value to 1 over 500 milliseconds to create a fade-in effect.