JSON

JSON is a lightweight language independent data-interchange format. It is convenient for both people and machines. See more details and implementations on other languages on official page.

Any JSON text is a valid JavaScript expression, but not any JavaScript text is JSON.

• JSON supports objects, arrays, numbers, strings, booleans, and null
• property names must be double-quoted strings
• leading zeros are prohibited for numbers
• NaN and Infinity values for numbers not supported
• undefined value not supported
• comments not supported

For working with JSON the JSON type is used.

var jsonSrc = '{"width": 3, "height": 7, "descr": "wood stuff"}';  

var objDst = JSON.parse(strJson, (key, value) =>
  typeof value === 'number' // convert meters to millimeters
    ? value * 1000 
    : value     
);

console.log(objDst);

var objSrc = {width: 3, height: 7, descr: "wood stuff"};

var jsonDst = JSON.stringify(objSrc, (key, value)=>{
     if (typeof value === 'string') {
       return undefined;
     } 
     return value;
   }, 4);
    
console.log(jsonDst)
/* result:
{
    "width": 3,
    "height": 7
}*/

static methods