JSend Utils

Simple helper functions for producing JSend objects and responses.

It's important to mention that this implementation differs from the JSend spec in the naming of errors. The spec uses the term fail for a problem with the submitted data or an unsatisfied precondition. It used the term error for a server-side error. I think their terminology is backwards--the caller can correct an error, but not a failure. So, in this implementation, the status field will be error for client errors, and fail for server-side failures.

Installation

Install this module in the usual way:

npm install jsend-utils

Usage

To decorate Express's response with methods you can use to return JSend responses, do the following (you'll only need to do this once, typically in your main app.js):

require('./lib/jsend').decorateExpressResponse(require('express').response);

Sometimes it's useful for server-side code to return an error to another server-side caller, but provide more details about what went wrong, and do so in the JSend format, making it easier to return a JSend response to the client side. The four Error subclasses provided by this module are intended for that use case.

For full documentation, generate the JSDocs:

npm run-script api-docs

You'll find the generated docs in the out directory.