node.js - How do I extend the Error class? -


this code:

  let errorbadrequest = new error("bad request");    res.statuscode = 400;   errorbadrequest.errors = err.details.reduce(function(prev, current) {     prev[current.path] = current.message;     return prev;   }, {});   throw errorbadrequest;

i wanted extend error attribute in error instance, tsc said joi-utils.ts(21,23): error ts2339: property 'errors' not exist on type 'error'.

the structure of errors {fieldname: fieldmsg}, it's according joi request schema decide.

how solve error typescript compiler? think need declare interface , designate attribute.

property 'errors' not exist on type 'error'.

create file called error-extension.d.ts , have following: 

interface error {     errors: error; }

more : https://basarat.gitbooks.io/typescript/content/docs/types/lib.d.ts.html


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