Vue Js Allow Only Alphabets in input field: In this article, we will show how to restrict user input to alphabets only in a
Vue Js input field without utilizing the Vue Js package. We will accomplish this by utilizing Regular Expression inside the onChange event of the input field to check if the entered text contains only alphabets. If it does, we will set the value to the input field, otherwise, we will ignore the input. This approach will prevent users from entering special characters, numbers, or symbols in the input field, ensuring that only alphabets are allowed. This is a useful technique for forms that require specific input formats, such as names or addresses.
How does the Vue.js code ensure that only alphabetic characters are entered in the textarea input field?
This is a Vue.js code that allows only alphabetic characters in a textarea input field. It uses a regular expression to test the input value and displays an error message if non-alphabetic characters are entered. The method “validateInput” is triggered on input, and if the input is invalid, it replaces the non-alphabetic characters with an empty string and displays an error message. Otherwise, it clears the error message.
Allow only alphabets in the input field in Vue Js | Example
<div id="app">
<h3>Vue Js Allow only Alphabets in Textbox</h3>
<textarea type="text" @input="validateInput"></textarea>
<pre v-if="errorMessage" style="color:red">{{ errorMessage }}</pre>
</div>
<script type="module">
import { createApp } from "vue";
createApp({
data() {
return {
errorMessage: '',
}
},
methods: {
validateInput(event) {
const regex = /^[a-zA-Z]+$/;
if (!regex.test(event.target.value)) {
event.target.value = event.target.value.replace(/[^a-zA-Z]/g, '');
this.errorMessage = 'Please enter alphabetic characters only.';
} else {
this.errorMessage = '';
}
},
}
}).mount("#app");
</script>
Output of above example
![](https://danatec.vn/wp-content/uploads/2024/07/7-8.webp)