try-catch-callback

try-catch-callback

try/catch block with a callback, used in try-catch-core. Use it when you don't care about asyncness so much and don't want guarantees. If you care use try-catch-core.

Install

npm i try-catch-callback --save

Usage

For more use-cases see the tests

const tryCatchCallback = require('try-catch-callback')

tryCatchCallback

Pass a synchronous fn that returns some result and handle completion or errors in cb if given, otherwise it returns thunk which accepts that cb. It's possible to not work in "async mode", if that's the case try to use try-catch-core for your case, which guarantees that cb is called only once and always in next tick, using dezalgo and once.

Params

• <fn> {Function}: function to be called.
• [opts] {Object}: optional options, such as context and args
• [opts.context] {Object}: context to be passed to fn
• [opts.args] {Array}: custom argument(s) to be pass to fn, given value is arrayified
• [opts.passCallback] {Boolean}: pass true if you want cb to be passed to fn args.
• [cb] {Function}: callback with cb(err, res) signature.
• returns {Function} thunk: if cb not given.

Example

var tryCatch = require('try-catch-callback')

tryCatch(function () {
  return 'fox qux'
}, function done (err, res) {
  if (err) return console.error(err)
  console.log(res) // => 'fox qux'
})

passing custom context

const tryCatch = require('try-catch-callback')

tryCatch(function () {
  console.log(this.foo) // => 'bar'
  console.log(this.baz) // => 'qux'
  return `${this.foo}/${this.baz}`
}, {
  context: { foo: 'bar', baz: 'qux' }
}, function done (err, res) {
  if (err) return console.error(err)
  console.log(res) // => 'bar/qux'
})

passing custom arguments

const tryCatchCallback = require('try-catch-callback')
const done = (err, res) => console.log(res) // => 'zzz123'
const opts = {
  args: [ { foo: 'zzz' }, 123 ]
}

tryCatchCallback((ctx, qux) => {
  return ctx.foo + qux
}, opts, done)

returning a thunk

const tryCatch = require('try-catch-callback')
const thunk = tryCatch((a, b) => {
  return a + b + 3
}, { args: [1, 2] })

thunk((err, res) => {
  console.log(res) // => 6
})

Related

• catchup: Graceful error handling. Because core domain module is deprecated. This share almost… more | homepage
• gana-compile: Pretty small synchronous template engine built on ES2015 Template Strings, working on… more | homepage
• gana: Small and powerful template engine with only sync and async compile. The… more | homepage
• try-catch-core: Asynchronous and sync tryCatch in one place. The callback is securely wrapped… more | homepage
• try-require-please: Try to require the given module, failing loudly with default message if… more | homepage

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.

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