Sample Code:
HTML:
<template>
<div class="slds-theme--default slds-p-around_large">
<lightning-input type="checkbox" label="Basic option" checked={showBool}></lightning-input><br/><br/>
<lightning-button variant="brand"
label="Uncheck"
onclick={hide}></lightning-button>
</div>
</template>
JavaScript:
import { LightningElement } from 'lwc';
export default class Sample extends LightningElement {
showBool = true;
hide() {
this.showBool = false;
}
}
Output:
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