How do you save an array in async storage in react native ?

Question

I am trying to create a save for later list, what type of storage is best for this async storage or some other method?

Is there an example of saving an array in this method?

Avisek Chakraborty · Accepted Answer · 2021-12-09 13:46:08Z

50

Convert your array to a string using JSON.stringify on save and back to an array using JSON.parse on read:

var myArray = ['one','two','three'];

try {
  await AsyncStorage.setItem('@MySuperStore:key', JSON.stringify(myArray));
} catch (error) {
  // Error saving data
}

try {
  const myArray = await AsyncStorage.getItem('@MySuperStore:key');
  if (myArray !== null) {
    // We have data!!
    console.log(JSON.parse(myArray));
  }
} catch (error) {
  // Error retrieving data
}

Modified example from https://react-native-async-storage.github.io/async-storage/docs/install/

edited Dec 9, 2021 at 13:46

Avisek Chakraborty

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answered Jul 17, 2016 at 2:08

FuzzyTree

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2 Comments

hloth Over a year ago

what if array's length is 1 mil records?

mirsahib Over a year ago

@VityaSchel On android react native async storage size has been set to 6MB so I don't think it can accommodate that much data.

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