Mryntu

Can a Bard use an arcane focus?

Teaching indefinite integrals that require special-casing

The One-Electron Universe postulate is true - what simple change can I make to change the whole universe?

Is there enough fresh water in the world to eradicate the drinking water crisis?

Java - What do constructor type arguments mean when placed *before* the type?

Pronouncing Homer as in modern Greek

Can I create an upright 7-foot × 5-foot wall with the Minor Illusion spell?

How do I repair my stair bannister?

Is there any significance to the Valyrian Stone vault door of Qarth?

Can I use my Chinese passport to enter China after I acquired another citizenship?

Greatest common substring

I'm in charge of equipment buying but no one's ever happy with what I choose. How to fix this?

Freedom of speech and where it applies

How can a jailer prevent the Forge Cleric's Artisan's Blessing from being used?

Blender - show edges angles “direction”

Calculating the number of days between 2 dates in Excel

What if somebody invests in my application?

Science Fiction story where a man invents a machine that can help him watch history unfold

How to prevent YouTube from showing already watched videos?

For airliners, what prevents wing strikes on landing in bad weather?

Why isn't KTEX's runway designation 10/28 instead of 9/27?

Would it be legal for a US State to ban exports of a natural resource?

Can a Gentile theist be saved?

Simulating a probability of 1 of 2^N with less than N random bits

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

share|improve this question

asked 1 hour ago

Lance ShiLance Shi

7,52633077

add a comment | 

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

asked 1 hour ago

Lance ShiLance Shi

7,52633077

add a comment | 

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

asked 1 hour ago

Lance ShiLance Shi

7,52633077

share|improve this question

asked 1 hour ago

Lance ShiLance Shi

7,52633077

share|improve this question

asked 1 hour ago

Lance ShiLance Shi

7,52633077

asked 1 hour ago

Lance ShiLance Shi

7,52633077

asked 1 hour ago

Lance ShiLance Shi

7,52633077

2 Answers
2

active

oldest

votes

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

answered 1 hour ago

Jayant DasJayant Das

17k21330

add a comment | 

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

edited 50 mins ago

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

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
  30 mins ago
  

  
  
  
  

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "459"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsalesforce.stackexchange.com%2fquestions%2f255251%2flightning-web-component-do-i-need-to-track-changes-for-every-single-input-fiel%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

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

answered 1 hour ago

Jayant DasJayant Das

17k21330

add a comment | 

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

answered 1 hour ago

Jayant DasJayant Das

17k21330

add a comment | 

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

answered 1 hour ago

Jayant DasJayant Das

17k21330

share|improve this answer

answered 1 hour ago

Jayant DasJayant Das

17k21330

answered 1 hour ago

Jayant DasJayant Das

17k21330

answered 1 hour ago

Jayant DasJayant Das

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

edited 50 mins ago

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

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
  30 mins ago
  

  
  
  
  

add a comment | 

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

edited 50 mins ago

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

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
  30 mins ago
  

  
  
  
  

add a comment | 

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

edited 50 mins ago

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

61.5k7105147

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

share|improve this answer

edited 50 mins ago

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

61.5k7105147

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

61.5k7105147

answered 59 mins ago

Mohith ShrivastavaMohith Shrivastava

61.5k7105147