Qfyilyi

We are trying to setup a top level global unhadled error detector on our hybrid Ionic 1 app. Following this documentation, we have subscribed to window.addEventListener in order to do so, but it's capturing almost nothing. Then, we started using Angular's $exceptionHandler and it solves the issue partially, but it's still missing the HTTP and script errors. Details:

• resource errors (image download errors, script parse errors) are not being handled by window.addEventListener nor by Angular's $exceptionHandler


• errors thrown by controller loading, ionic events like beforeEnter, ionic methods called from the UI through template events bindings, ajax calls... none of them are handled by window.addEventListener - Angular's $exceptionHandler does handle them


• Surprisingly, all code scheduled with a setTimeout from all those places is properly handled by window.addEventListener
  

Next files demonstrates all what has been assured:

// app.js



angular.module("starter", [dependencies]).config(function () {

    window.addEventListener("error", function (event) {

        console.error("Error caught", event);

    });

});

.

// controllers.js



angular.module('starter.controllers', [dependencies]).controller("HomeCtrl", function ($scope, $http) {

    var nullVariable = null;

    var assignmentTarget;



    $scope.testClick = function () {

        setTimeout(function () {

            assignmentTarget = nullVariable.testClickTimeout; // handled

        }, 0);



        assignmentTarget = nullVariable.testClick; // unhandled

    };



    $scope.$on('$ionicView.beforeEnter', function () {

        setTimeout(function () {

            assignmentTarget = nullVariable.homeCtrlBeforeEnterTimeout; // handled

        }, 0);



        assignmentTarget = nullVariable.homeCtrlBeforeEnter; // unhandled

    });



    $http({

        method: "GET",

        responseType: "json",

        url: "comeurl"

    }).then(function (response) {

        setTimeout(function () {

            assignmentTarget = nullVariable.ajaxResponseTimeout; // handled

        }, 0);



        assignmentTarget = nullVariable.ajaxResponse; // unhandled

    });



    setTimeout(function () {

        assignmentTarget = nullVariable.homeCtrlTimeout; // handled

    }, 0);



    assignmentTarget = nullVariable.homeCtrl; // unhandled



});