CODE EXAMPLE FOR JAVASCRIPT

Font Size changed from device OS react native app

// Override Text scaling
if (Text.defaultProps) {
  Text.defaultProps.allowFontScaling = false;
} else {
  Text.defaultProps = {};
  Text.defaultProps.allowFontScaling = false;
}

// Override Text scaling in input fields
if (TextInput.defaultProps) {
  TextInput.defaultProps.allowFontScaling = false;
} else {
  TextInput.defaultProps = {};
  TextInput.defaultProps.allowFontScaling = false;
}
 Run code snippet