Utilizing Expressions in LWC with if true and if:false

Expressions enable us to dynamically control the rendering and display of elements in the markup based on specified conditions.

Aura Expressions

<aura:if isTrue="{! (!v.attribute ? ifYes : ifFalse) }">
    <div>Conditional displayed elements/text</div>
</aura:if>

In Aura, as shown above, we can directly write expressions in the markup. However, in LWC, it is not possible to directly write expressions in the markup. Instead, we need to write expressions in JavaScript and utilize their results in the markup.

Expressions in LWC

<template>
    <div if:true={expression}>elements</div>
</template>

import { LightningElement } from 'lwc';
export default class SampleComponent {
    get expression() {
        return condition ? true : false;
    }
}

Note: In LWC, the directives if:true and if:false specifically evaluate boolean values, accepting either true or false to control conditional rendering of elements.