Package Exports

catch-match
catch-match/dist/main.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (catch-match) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

catch-match

Motivation

java

try {
    ...
} catch (ExceptionClass1 e) {
   ....
} catch (ExceptionClass2, ExceptionClass3 e) {
   ....
} catch (any) {
  ...
} finally {
  ....
}

javascript

try {
  error; // error intruction
} catch (err) {
  switch(err.constructor) {
    case ReferenceError:
    case SyntaxError:
      console.error(`${err.constructor.name}: ${err.message}`);
      break;
    default:
      console.error('other error:', err);
  }
} finally {
  console.log('final')
}

//> ReferenceError: error is not defined
//> final

Getting started

yarn add catch-match

or 

npm install catch-match

import { _try } from 'catch-match';

Example 1

const result = _try(context => {
    context.tmp = 'any context data';
    console.log('start', context);
    return [1, 2, 3, 4, 5]; // value
}).catch(SyntaxError, (context) => {
    // noop
}).catch([TypeError, ReferenceError], (context) => {
    // noop
}).other((error, context) => {
    // noop
}).finally(({value, context, error}) => {
    // value: [1, 2, 3, 4, 5] 
    // context: {tmp: 'any context data'}
    // error: undefined
    if (!error) {
      return value.reverse();
    }
});

console.log(result); 
// {
//     value: [5, 4, 3, 2, 1] 
//     context: {tmp: 'any context data'}
//     error: undefined
// }

Example 2

const result = _try(context => {
  context.tmp = 'any context data';
  console.log('start', context);
  // ...
  throw ReferenceError;
}).catch(SyntaxError, (context) => {
  // noop
}).catch([TypeError, ReferenceError], (context) => {
  // context: {tmp: 'any context data'}
}).other((error, context) => {
  // noop
}).finally(({value, context, error}) => {
  // value: undefined 
  // context: {tmp: 'any context data'}
  // error: ReferenceError
  if (!error) {
    return value.reverse();
  }
});

console.log(result); 
// {
//     value: undefined 
//     context: {tmp: 'any context data'}
//     error: ReferenceError
// }

Example 3

const result = _try(context => {
  context.tmp = 'any context data';
  console.log('start', context);
  // ...
  throw SyntaxError;
}).catch([TypeError, ReferenceError], (context) => {
  // noop
}).other((error, context) => {
  // error: SyntaxError
  // context: {tmp: 'any context data'}
  context.unexpectedError = true;
}).finally(({value, context, error}) => {
  // value: undefined 
  // context: {tmp: 'any context data', unexpectedError: true}
  // error: SyntaxError
  if (!error) {
    return value.reverse();
  }
});

console.log(result); 
// {
//     value: undefined 
//     context: {tmp: 'any context data', unexpectedError: true}
//     error: SyntaxError
// }