create javascript array from json code example

Example 1: js array to json

// Array to JSON:
const jsonString = JSON.stringify(yourArray);
// JSON to Object / Array
const yourData = JSON.parse(jsonString);

Example 2: js create json array

var employees = {
    accounting: []
};

for(var i in someData) {    

    var item = someData[i];   

    employees.accounting.push({ 
        "firstName" : item.firstName,
        "lastName"  : item.lastName,
        "age"       : item.age 
    });
}