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setItem

To update or add a key-value pair in a given JSON object

With this function, you can update an already existing JSON object and add more data to it.

If your JSON object is stored in a variable, it will be modified even if the return value is not stored in the variable again.

setItem(JSON, string, any)

JSON

setItem(object, key, newValue) Updates a key-value pair in a given JSON object.

let data := {
    lastName: "Rogers",
    firstName: "Steve"
    };
setItem(data, "firstName", "Brian")

Result: The object data is changed: The value assigned to the key firstName is overwritten with the value Brian.

setItem(object, newKey, newValue) Adds a key-value pair to a given JSON object.

let data := {
    lastName: "Rogers",
    firstName: "Steve"
    };
setItem(data, "age", 112)

Result: The object data is supplemented by the key-value pair age: 112.