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A Comprehensive Guide To Working With JSON in JavaScript


What Is a JSON Object? JSON stands for Javascript Object Notation and is a standard text-based format for representing structured data based on JavaScript object syntax. JSON defines only two data structures: objects and arrays. JSON object is a data type that consists of key/value pairs surrounded by curly braces. JSON array is a list of values. JSON objects are often used when data is sent from a server to a webpage or when data is stored in files or databases. JSON closely resembles Javascript object literal syntax but can be used independently from Javascript. Many programming environments support reading and generating JSON. Features of JSON Objects They are written in key/value pairs, separated by commas. A key is a string enclosed in double quotes, and a value must be a JSON data type as below string number object array boolean null They are surrounded by curly braces {}. Curly braces can also be used to nest objects within objects, creating a hierarchical structure. Arrays are enclosed in brackets [], and their values are separated by a comma (,). Each value in an array may be of a different type, including another array or an object. They are case-sensitive, meaning the keys and values must match exactly in spelling and capitalization. They don't allow trailing commas. In simple terms, there should not be any text outside the curly braces or inside the double quotes that are not part of the key/value pairs. They don't allow comments. JSON offers several benefits, making it a popular choice for representing structured data:

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