Angular – Best Practices to Capture User Inputs

November 8, 2017 by Ajitesh Kumar · Leave a comment

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='' "/>

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Ajitesh Kumar
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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. I would love to connect with you on Linkedin. Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking.
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