vue.jsHow do I use the v-if directive in Vue.js?

The v-if directive in Vue.js is used to conditionally render a piece of DOM based on a given expression. It is similar to an if statement in JavaScript, but with the added benefit of being able to render the DOM instead of just a boolean value.

For example, if we want to conditionally render a <p> element based on a boolean value, we can use the following code:

<div>
    <p v-if="showText">This text will be displayed if showText is true</p>
</div>

In the above example, the <p> element will only be rendered if the showText variable is true.

The v-if directive also supports else statements, which allows us to render a different piece of DOM if the expression evaluates to false. For example:

<div>
    <p v-if="showText">This text will be displayed if showText is true</p>
    <p v-else>This text will be displayed if showText is false</p>
</div>

In this example, if showText is true, the first <p> element will be rendered, and if showText is false, the second <p> element will be rendered.

The v-if directive is a powerful tool for conditionally rendering pieces of DOM in Vue.js.

Code explanation

• <p v-if="showText">: This is the directive that is used to conditionally render the <p> element.
• showText: This is the variable that is used to determine whether the <p> element is rendered or not.
• v-else: This is the directive that is used to render a different piece of DOM if the expression evaluates to false.

Helpful links

• Vue.js Documentation - Conditional Rendering
• Vue.js Directives

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