json.stringify map object

unel answered on December 22, 2023 Popularity 3/10 Helpfulness 8/10

answer json.stringify map object

json.stringify map object

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function replacer(key, value) {
  if(value instanceof Map) {
    return {
      dataType: 'Map',
      value: Array.from(value.entries()), // or with spread: value: [...value]
    };
  } else {
    return value;
  }
}

function reviver(key, value) {
  if(typeof value === 'object' && value !== null) {
    if (value.dataType === 'Map') {
      return new Map(value.value);
    }
  }
  return value;
}

const originalValue = new Map([['a', 1]]);
const str = JSON.stringify(originalValue, replacer);
const newValue = JSON.parse(str, reviver);
console.log(originalValue, newValue);

Popularity 3/10 Helpfulness 8/10 Language javascript

Source: Grepper

Tags: javascript map object

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Contributed on Dec 22 2023

unel

0 Answers Avg Quality 2/10

json.stringify map object

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