mswjs/msw v0.18.0

on GitHub

Features

• Adds support for declaring runtime request handlers (#128, #187):
  • .use() to prepend any request handlers. Any prepended request handlers take priority over existing ones, if their predicate match.
    • Usage example of .use() for setupServer
    • Usage example of .use() for setupWorker
  • .restoreHandlers() to mark any used one-time request handlers as unused, allowing them to affect network again.
    • Usage example of .restoreHandlers() for setupServer
    • Usage example of .restoreHandlers() for setupWorker
  • .resetHandlers() to remove any request handlers added on runtime. Optionally accepts a list of next request handlers that replace the initial handlers passed to setupServer/setupWorker call.
    • Usage example of .resetHandlers() for setupServer
    • Usage example of .resetHandlers() for setupWorker
• Adds support for one-time request handlers using res.once(). Such handles will respond with a given mocked response only once upon request match:

rest.get('/books', (req, res, ctx) => {
  return res.once(ctx.json([1, 2, 3]))
})

Bug fixes

• Fixes an issue that resulted into the following TypeScript error when installing msw (#185, #186 ):

TS7016: Could not find a declaration file for module 'cookie'

• Fixes an outdated GitHub repository link in the mockServiceWorker.js file.