Lightning Web Component - do I need to track changes for every single input field in a form












2















Since lwc is one-way data binding so if I need to get the current value of the input field I turned out to use event.target.value in the onchange event.



However, if we need to have a form of input fields and only need to collect all of the data at the form submission time, do I still need to add onchange event on every one of the input field at all? Or can I simply collect the information at the submission time?






lightning-web-components







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    2















    Since lwc is one-way data binding so if I need to get the current value of the input field I turned out to use event.target.value in the onchange event.



    However, if we need to have a form of input fields and only need to collect all of the data at the form submission time, do I still need to add onchange event on every one of the input field at all? Or can I simply collect the information at the submission time?






    lightning-web-components







    share|improve this question

























      2












      2








      2








      Since lwc is one-way data binding so if I need to get the current value of the input field I turned out to use event.target.value in the onchange event.



      However, if we need to have a form of input fields and only need to collect all of the data at the form submission time, do I still need to add onchange event on every one of the input field at all? Or can I simply collect the information at the submission time?






      lightning-web-components







      share|improve this question














      Since lwc is one-way data binding so if I need to get the current value of the input field I turned out to use event.target.value in the onchange event.



      However, if we need to have a form of input fields and only need to collect all of the data at the form submission time, do I still need to add onchange event on every one of the input field at all? Or can I simply collect the information at the submission time?






      lightning-web-components




      lightning-web-components






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      share|improve this question











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      asked 1 hour ago









      Lance ShiLance Shi

      7,52633077




      7,52633077






















          2 Answers
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          In my opinion, this is more of how you want to implement and most importantly how would you want to interact with the Users filling in the form. Sometimes one over other is just what you need.




          do I still need to add onchange event on every one of the input field at all?




          Use this approach if you really want to alert the user about any error in the field right away instead of waiting for end.




          Or can I simply collect the information at the submission time?




          Use this approach if you want to defer the validation until the submission.






          share|improve this answer































            1














            I would simply collect all the information on form submission using query selector.



            this.template.querySelector('classname'); //use query selector


            Note that @track should not be used extensively . It makes less sense to use this decorator if we are not rendering something on the UI .



            If there is no client side validations involved on page, there is no need to use change handler on every input .






            share|improve this answer


























            • So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

              – Lance Shi
              39 mins ago











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            2 Answers
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            2 Answers
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            active

            oldest

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            active

            oldest

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            active

            oldest

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            2














            In my opinion, this is more of how you want to implement and most importantly how would you want to interact with the Users filling in the form. Sometimes one over other is just what you need.




            do I still need to add onchange event on every one of the input field at all?




            Use this approach if you really want to alert the user about any error in the field right away instead of waiting for end.




            Or can I simply collect the information at the submission time?




            Use this approach if you want to defer the validation until the submission.






            share|improve this answer




























              2














              In my opinion, this is more of how you want to implement and most importantly how would you want to interact with the Users filling in the form. Sometimes one over other is just what you need.




              do I still need to add onchange event on every one of the input field at all?




              Use this approach if you really want to alert the user about any error in the field right away instead of waiting for end.




              Or can I simply collect the information at the submission time?




              Use this approach if you want to defer the validation until the submission.






              share|improve this answer


























                2












                2








                2







                In my opinion, this is more of how you want to implement and most importantly how would you want to interact with the Users filling in the form. Sometimes one over other is just what you need.




                do I still need to add onchange event on every one of the input field at all?




                Use this approach if you really want to alert the user about any error in the field right away instead of waiting for end.




                Or can I simply collect the information at the submission time?




                Use this approach if you want to defer the validation until the submission.






                share|improve this answer













                In my opinion, this is more of how you want to implement and most importantly how would you want to interact with the Users filling in the form. Sometimes one over other is just what you need.




                do I still need to add onchange event on every one of the input field at all?




                Use this approach if you really want to alert the user about any error in the field right away instead of waiting for end.




                Or can I simply collect the information at the submission time?




                Use this approach if you want to defer the validation until the submission.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 1 hour ago









                Jayant DasJayant Das

                17k21330




                17k21330

























                    1














                    I would simply collect all the information on form submission using query selector.



                    this.template.querySelector('classname'); //use query selector


                    Note that @track should not be used extensively . It makes less sense to use this decorator if we are not rendering something on the UI .



                    If there is no client side validations involved on page, there is no need to use change handler on every input .






                    share|improve this answer


























                    • So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                      – Lance Shi
                      39 mins ago
















                    1














                    I would simply collect all the information on form submission using query selector.



                    this.template.querySelector('classname'); //use query selector


                    Note that @track should not be used extensively . It makes less sense to use this decorator if we are not rendering something on the UI .



                    If there is no client side validations involved on page, there is no need to use change handler on every input .






                    share|improve this answer


























                    • So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                      – Lance Shi
                      39 mins ago














                    1












                    1








                    1







                    I would simply collect all the information on form submission using query selector.



                    this.template.querySelector('classname'); //use query selector


                    Note that @track should not be used extensively . It makes less sense to use this decorator if we are not rendering something on the UI .



                    If there is no client side validations involved on page, there is no need to use change handler on every input .






                    share|improve this answer















                    I would simply collect all the information on form submission using query selector.



                    this.template.querySelector('classname'); //use query selector


                    Note that @track should not be used extensively . It makes less sense to use this decorator if we are not rendering something on the UI .



                    If there is no client side validations involved on page, there is no need to use change handler on every input .







                    share|improve this answer














                    share|improve this answer



                    share|improve this answer








                    edited 58 mins ago

























                    answered 1 hour ago









                    Mohith ShrivastavaMohith Shrivastava

                    61.5k7105147




                    61.5k7105147













                    • So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                      – Lance Shi
                      39 mins ago



















                    • So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                      – Lance Shi
                      39 mins ago

















                    So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                    – Lance Shi
                    39 mins ago





                    So it is pretty much using the traditional jQuery style to get the values by either class or id, is that correct?

                    – Lance Shi
                    39 mins ago


















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