Hi if my criteria gets satisfied i need to set the value as blank in input field in the Lightning Web Component.

please help me out for this.

Html:- {dueDate}

  • You need to set the date input as null in your if condition in javascript.
    – Aakriti.G
    Jul 15, 2020 at 14:50
  • How can i do in javascript??
    – Tisca
    Jul 15, 2020 at 14:52
  • Just do this.startDate = ''. Jul 15, 2020 at 14:57
  • this is working for only one time if user select the wrong value the it is getting populated
    – Tisca
    Jul 15, 2020 at 15:01

1 Answer 1


In your javascript file, you need to set the date as null in your if condition. Refer this:-

if (fieldName === 'start-date') {
    let checkstartdate = evt.target.value;
    console.log("checkenddate == "+new Date(checkstartdate));
    if((????Condition) {
    this.startDate = null; <ADD_THIS_LINE>
    ///**Here on UI I want to set the Start date field as Blank**///
    this.dateValidity = false;
else {
      this.startDate = evt.target.value;
  • Thanks @Akriti For the fist time this is working fine but for the next time if user again select the wrong date it is getting populated..
    – Tisca
    Jul 15, 2020 at 15:07
  • Please check your condition is working properly. The If condition (Line no 4 in js). Try to use console.log to check if it is going inside your if condition.
    – Aakriti.G
    Jul 15, 2020 at 15:10
  • I checked Toast is getting called everytime but Field is getting blank for first time only.
    – Tisca
    Jul 15, 2020 at 17:26

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