We can also use special tools that preprocess JSON files and strip comments from JSON before passing those files to JSON parsing libraries. Therefore, your server should ignore this element when processing the received JSON.Īdding Comments to JSON Using External Tools This custom comment element will be received and processed in the same way as any other data in JSON on the server-side. The underscore is used as a convention to distinguish comments from the rest of the data. We added the comment as a custom "_comment" element to this JSON comment example. Since JSON is a textual format for storing and exchanging data using key-value pairs, we can add comments as data pairs in JSON. Adding JSON comments as custom JSON elements Unlike JSON comments, XML comments are supported out of the box. Therefore, the only option for adding comments to JSON is a workaround to use custom elements to store comments in a JSON file. He describes why he removed the comments from the JSON as follows: I removed comments from JSON because I saw people using them to store parsing directives, which would break compatibility. Why doesn't JSON support comments?ĭouglas Crockford, who popularized the JSON data format, deliberately removed comments from JSON to prevent misuse of the JSON format and keep it as a data-only format. You can add comments to JSON as custom JSON elements that will hold your comments, but these elements will still be data. Comments in the form //, #, or /* */, which are used in popular programming languages, are not allowed in JSON. The MIME type for JSON is application/json. JSON is used when sending data to or from the server and making API calls. JSON (JavaScript Object Notation) is a lightweight text format for storing and transmitting data over a network.
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