Vue Js Validate IFSC Code

<!DOCTYPE html>
<html>
<head>
	<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
	<h3>Vue js Validate IFSC CODE</h3>
	<div id="app">
		<input type="text" v-model="ifscCode" @input="checkIfscCode" />
        <pre v-if="errorMessage" style="color:red">{{ errorMessage }}</pre>
	</div>
	<script type="module">
		const app = Vue.createApp({
			data() {
				return {
					ifscCode: 'SBIN0001882',
					errorMessage: '',
				}
			},
			methods: {
				checkIfscCode() {
				 const ifscPattern = /^[A-Z]{4}0[A-Z0-9]{6}$/;
					if (this.ifscCode === '') {
						this.errorMessage = 'Please Enter IFSC CODE';
					} else if (ifscPattern.test(this.ifscCode)) {
						this.errorMessage = 'Valid IFSC CODE';
					} else {
						this.errorMessage = 'Invalid IFSC CODE';
					}
				},
			},
		});
		app.mount('#app');
	</script>
	<style scoped>
		input {
			height: 40px;
			text-align: center;
			font-size: 24px;
			margin: 0;
			padding-left: 0;
			border: none;
			border-bottom: 2px solid #ccc;
			box-shadow: none;
			background-color: transparent;
			color: #333;
			transition: all 0.3s ease-in-out;
			font-family: Arial, Helvetica, sans-serif;
		}
		input:focus {
			outline: none;
			border-bottom-color: #007bff;
		}
	</style>
</body>

</html>