What is causing the ngModelChange event to be triggered every time the input box gains or loses focus?

example.html

<input #gb type="text" pInputText class="ui-widget ui-text" [(ngModel)]
="filterText"  (ngModelChange)="filterText = $event; clearFilter(filterText)"/>

script.js 

 clearFilter(value) {
                alert(value);// the value is currently empty
            }

This alert will trigger every time the input field is focused in or out. I only want the function to execute if there are changes to the model object.

How can this be handled and why does the ngModelChange event fire when focusing in and out of the input box?

angulartypescriptangular-ngmodelchange

Answer №1

Their main task is to manage changes in the text box when you use focus and blur methods.

<input #gb type="text" pInputText class="ui-widget ui-text" 
  [(ngModel)] ="filterText" 
  (ngModelChange)="clearFilter(filterText)"
  (blur)="clearFilter($event)"
  (focus)="clearFilter($event)"/>

LIVE DEMO

Adjustments made according to feedback received.

When using [(ngModel)] and (ngModelChange), it triggers certain actions.

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