Question 1

How do I use react-native-responsive-fontsize with Expo?

Accepted Answer

Install it via npm or yarn in your Expo project—it's compatible as a standard React Native library. Just import and use RFValue or RFPercentage in your StyleSheet, but verify it works with your Expo SDK version for any potential conflicts.

Question 2

react-native-responsive-fontsize vs react-native-size-matters, which should I choose?

Accepted Answer

react-native-responsive-fontsize focuses only on font scaling, while react-native-size-matters offers broader utilities for sizes, margins, and more. Pick this if you need simple typography scaling; opt for react-native-size-matters for a comprehensive responsive design toolkit.

Question 3

How to handle font scaling for accessibility in React Native?

Accepted Answer

This library scales based on screen size, not user preferences. For accessibility, you might need to combine it with React Native's AccessibilityInfo to detect system font settings and adjust RFValue parameters accordingly for better inclusivity.

Question 4

Does react-native-responsive-fontsize work with TypeScript?

Accepted Answer

Yes, it should work with TypeScript as it's a JavaScript library. Check the npm package for TypeScript definitions or use community types if available, but the basic functions are straightforward to type.

Question 5

How to customize RFValue for different screen heights like tablets?

Accepted Answer

Pass a custom standardScreenHeight as the second argument in RFValue, as shown in the README example. For tablets, set a higher reference height (e.g., 800) and test on target devices to ensure fonts scale appropriately without becoming too large.

Question 6

Can I use it with functional components in React Native?

Accepted Answer

Absolutely—it's a utility function that works in any component type. Import RFValue or RFPercentage and apply it directly in StyleSheet objects within functional or class components, just like in the provided code snippets.

react-native-responsive-fontsize

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