Angular – Best Practices to Capture User Inputs


This blog represents a list of recommendations for capturing user inputs from a form in an Angular app.

  • One should make use of template reference variable instead of the $event object to refer to the input element in order to capture user inputs from forms. Following represents the usage of template reference variable.
    <input #fullname (keyup)="setName(fullname.value)"/>

    The following represents usage of $event object (not recommended):

    <input (keyup)="setName($event)"/>
  • When using the template reference variable, the “value” should be passed rather than passing elements. The following represents usage of passing by value:
    <input #fullname (keyup)="setName(fullname.value)"/>
  • Keep template statements simple. The following represents two statements on keyup event, one to pass the value and second to clear the field.
    <input #fullname (keyup)="setName(fullname.value); fullname='' "/>

In case you are developing web apps using Spring and Angular, check out my book, Building web apps with Spring 5 and Angular. Grab your ebook today and get started.

Ajitesh Kumar

Ajitesh Kumar

Ajitesh has been recently working in the area of AI and machine learning. Currently, his research area includes Safe & Quality AI. In addition, he is also passionate about various different technologies including programming languages such as Java/JEE, Javascript and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data etc.

He has also authored the book, Building Web Apps with Spring 5 and Angular.
Ajitesh Kumar

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