[Solved] Identify the issue in this Angular template:<input [ngModel]="userName" (ngModelChange)="userName = $event" /> <p>User: {{userName}}</p> | Angular

Angular - Templates and Data Binding

Identify the issue in this Angular template:

<input [ngModel]="userName" (ngModelChange)="userName = $event" />
<p>User: {{userName}}</p>

AThe component property userName is not declared.

BThe input element is missing a closing tag.

CThe interpolation syntax is incorrect.

DThis syntax can cause change detection issues compared to using [(ngModel)].

Step-by-Step Solution

Solution:

Step 1: Understand the syntax
The snippet uses separate property binding and event binding instead of the shorthand [(ngModel)].
Step 2: Potential issues
This can cause timing or change detection problems because the update cycle is split.
Step 3: Preferred approach
Using [(ngModel)] ensures atomic two-way binding and better synchronization.
Final Answer:
This syntax can cause change detection issues compared to using [(ngModel)]. -> Option D
Quick Check:
Use [(ngModel)] for reliable two-way binding [OK]

Quick Trick: Separate bindings may cause sync issues; prefer [(ngModel)] [OK]

Common Mistakes:

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