1

I have been looking into a neater, shorter, more simplified way of working with setting variables on the JS Controller dynamically.

At the moment I have seen a lot of people writing a lot of code or having separate handlers for each separate field to manage the keyup or keydown process.

So I wanted to think of an easier way of doing this to keep my controller a little cleaner.

4

I found a pretty nifty way of doing this very simple process, which I wanted to share:

HTML:

<lightning-input value={test} data-id="test" onkeyup={valueChange} onkeydown={valueChange} variant="label-hidden"></lightning-input>

JS:

@track test;

valueChange(event) {
    this[event.target.dataset.id] = event.target.value;
}

Doing this simplifies the way that you are setting a value in the JS Controller, I have seen a LOT of people using case of if/else to then decide where to assign values, depending on the "data id".

2
  • I thing you need to use this.somevar[event.target.dataset.id] = event.target.value; Mar 13 '20 at 8:55
  • 1
    No the idea of it is you don't need to hardcode "somevar", you can access all variables with the this keyword, if you console.log(this); you can see all of the variables that are in your JS Controller
    – Tim
    Mar 14 '20 at 13:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.