To transform array data into JSON using the identical class constructor instead of an object constructor, we can use the toJSON()
method. This method is automatically called when the object is passed through the JSON.stringify()
function.
Inside the toJSON()
method, we can create a new instance of the same class and pass it the necessary data from the original instance. Then we can return this new instance, and the JSON string will be created using its properties.
Here is an example:
class MyClass {
constructor(data) {
this.data = data;
}
toJSON() {
return new MyClass(this.data);
}
}
const myArray = [new MyClass(1), new MyClass(2), new MyClass(3)];
const jsonString = JSON.stringify(myArray);
console.log(jsonString); // '[{"data":1},{"data":2},{"data":3}]'
In this example, we create an array myArray
of instances of the MyClass
class. We then call JSON.stringify()
on the array, which automatically calls the toJSON()
method on each instance.
Inside the toJSON()
method, we create a new instance of MyClass
with the same data
property as the original instance. We then return this new instance. Finally, the JSON.stringify()
function creates a JSON string using the properties of the new instance, resulting in a JSON array of objects with the data
property.
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Asked: 2023-01-28 11:00:00 +0000
Seen: 1 times
Last updated: Nov 09 '22
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