A Friendly Way for React Native to Handle Number Input

Weijing Jay Lin
3 min readFeb 21, 2022

React Native is a cross platform solution for app development. Web has type='number' to constrain the input characters and or Mobile device has keyboardType to control the input as, but there are still some corner cases that are not properly handled, and easily cause NaN error, because it would allowed invalidate number input, eg multiple dots.

https://snack.expo.dev/@dotku/textinput---number

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Weijing Jay Lin

A software engineer entrepreneur in San Francisco Bay Area.