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.

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Ajitesh Kumar

I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. For latest updates and blogs, follow us on Twitter. I would love to connect with you on Linkedin.

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