javascript - How can I trigger global onError handler via native Promise when runtime error occurs? -

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• will javascript es6 promise support 'done' api? 3 answers

with q.js can trigger window.onerror using .done():

window.onerror = function() {     console.log('error handler'); } var q = q('initvalue').then(function (data) {     throw new error("can't , use promise.catch method."); }); q.catch(function(error){     throw new error("this last exception trigger window.onerror handler via done method."); }) .done(); 

in native promise (es6) have no .done(), , last ".catch" end of chain:

var p = new promise(function () {     throw new error("fail"); }); p.catch(function (error) {     throw new error("last exception in last chain link"); }); 

"throw new error(...)" in ".catch" 1 of simplest way reproduce runtime error. in reality, may analog of runtime error (evalerror, syntaxerror, typeerror, etc.), e.g.:

var = []; a(); // uncaught typeerror: not function 

.done usage example explain target more detail. haven't goal duplicate .done api.

my task is: have promises chain , handler on window.onerror. errors inside chain can handle .cath, except runtime error @ end of chain. when runtime exception occurs @ end of promise's methods chain, need have triggered handler hanged on window.onerror.

the restrictions: native js, must use window.onerror.

what best way trigger global handler via native promise?

throw error asynchronously:

window.addeventlistener('error', function() {    console.log('error handler');  });  new promise(function () {    throw new error("fail");  }).catch(function (error) {    settimeout(() => {throw new error("last exception in last chain link")}, 0);  });