Explain Vue.js directives like v-bind and v-on.

v-bind: Used for binding an attribute to an expression. For example, :src is shorthand for v-bind:src.

<img :src="imageUrl" alt="Image">

v-on: Used for attaching event listeners. For example, @click is shorthand for v-on:click.

<button @click="handleClick">Click me</button>