Imperative Apex While Offline

Imperative Apex calls always fail when the client device is offline. When using imperative Apex in an offline-enabled mobile app, it’s essential to handle the possibility of a network failure error.

Treat errors as a normal, expected outcome, rather than a failure condition. Provide appropriate feedback to the user, and suggest alternative behavior, rather than treating the situation as unexpected.

1// apexImperativeMethod.js
2import { LightningElement, track } from 'lwc';
3import getContactList from '@salesforce/apex/ContactController.getContactList';
4
5export default class ApexImperativeMethod extends LightningElement {
6    @track contacts;
7    @track error;
8
9    handleLoad() {
10        getContactList()
11            .then(result => {
12                this.contacts = result;
13            })
14            .catch(error => {
15                this.error = error;
16            });
17    }
18}

Offline-savvy components expect to be offline at times, and know what to do when that happens.

Mobile and Offline Developer Guide

Imperative Apex While Offline