Currently, I am developing an Angular 2 application where I aim to showcase messages by utilizing an interface and storing all the messages in an array. Below is a snippet of my TypeScript component that highlights this functionality:
export class ChatComponent
{
messages: message[];
constructor()
{
this.messages.push({from: 'me', time: new Date().getTime(), type: 'text', value: 'Hello World!', sent: new Date().getTime(), delivered: 0, read: 0});
}
}
interface message
{
from: string;
time: number;
type: string;
value: string;
sent: number;
delivered: number;
read: number;
}
Upon examination of the TypeScript configuration, everything appears to be in order. Displaying content within the template functioned perfectly well, as depicted below:
<div class = "message" *ngFor = "let message of messages">
<div>{{message.value}}</div>
<div>{{message.time}}</div>
</div>
Initially, when solely utilizing an array and populating it with objects, the setup worked seamlessly. However, upon implementing the message interface alongside the array, an error surfaced:
EXCEPTION: Error in :0:0 caused by: this.messages is undefined
This issue seems to stem from a minor oversight or misunderstanding on my end. Despite thorough research, I've been unable to pinpoint the root cause. But why exactly would this.messages be flagged as undefined?