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Showing content from https://github.com/vuejs/vue/issues/7653 below:

errorHandler not working in Promises

2.5.13

https://jsfiddle.net/zr7rz6xh/8/

Vue.config.errorHandler = function (err, vm, info) {
alert("handler");
};

new Vue({
el: '#app',
mounted: function() {
return new Promise(function(resolve, reject) {
throw new Error('err');
});
}
})

errorHandler should be called

Uncaught (in promise) Error: err

Vue.config.errorHandler is not called if the error occurs inside a promise or await/async function.

I want to use the created hook with an await call, so it has to be async. But then the errorHandler is ignored.

nemtsov, wspl, andrei-markeev, jpgklassen, entwwwicklung and 7 more

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