Serializing an ES6 class object as JSON

javascript json ecmascript-6 es6-class

eugene · Oct 23, 2016 · Viewed 28.4k times · Source

class MyClass {
  constructor() {
    this.foo = 3
  }
}

var myClass = new MyClass()

I'd like to serialize myClass object to json.

One easy way I can think of is, since every member is actually javascript object (array, etc..) I guess I can maintain a variable to hold the member variables.

this.prop.foo = this.foo and so on.

I expected to find a toJSON/fromJSON library for class objects since I used them with other languages such as swift/java, but couldn't find one for javascript.

Maybe class construct is too new, or what I'm asking can be somehow easily achieved without a library.

Answer

As with any other object you want to stringify in JS, you can use JSON.stringify:

JSON.stringify(yourObject);

class MyClass {
  constructor() {
    this.foo = 3
  }
}

var myClass = new MyClass()

console.log(JSON.stringify(myClass));

Also worth noting is that you can customize how stringify serializes your object by giving it a toJSON method. The value used to represent your object in the resulting JSON string will be the result of calling the toJSON method on that object.

Serializing an ES6 class object as JSON

Answer

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