How to Convert String to Array in Vue JS?

How to Convert String to Array in Vue.js (Complete 2026 Guide with Examples)

Converting a string to an array in Vue.js is a common task when working with form inputs, CSV data, tags, query parameters, or API responses. Whether you are using Vue 2 (Options API) or Vue 3 (Composition API), this guide explains every reliable method, best practices, edge cases, and production-ready techniques.

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This guide covers them all with practical examples.

To convert a comma separated string to an array in Vue.js:

this.myString.split(',')
For production-ready usage:
this.myString
 .split(',')
 .map(item => item.trim())
 .filter(Boolean)Copy

Now let’s explore all methods in detail.

Method 1: Using JavaScript split() in Vue.js (Most Common Method)

Vue.js uses standard JavaScript methods. The most widely used approach is String.prototype.split().

Example (Options API)

<template>
 <div>
   <input v-model="myString" placeholder="apple,banana,cherry" />
   <button @click="convertStringToArray">Convert</button>
   <p>{{ convertedArray }}</p>
 </div>
</template>
<script>
export default {
 data() {
   return {
     myString: "apple,banana,cherry",
     separator: ",",
     convertedArray: [],
   }
 },
 methods: {
   convertStringToArray() {
     this.convertedArray = this.myString.split(this.separator);
   },
 },
};
</script>Copy

Output

[“apple”, “banana”, “cherry”]

When to Use This Method

• Comma separated values
• Custom delimiter like | or ;
• Simple tokenization
• User-triggered conversion

Method 2: Production-Ready String to Array Conversion (Recommended)

In real applications, strings may contain:

• Extra spaces
• Empty values
• Mixed numbers and text
• Null or undefined values

Use this safer pattern:

convertStringToArray() {
 this.convertedArray = this.myString
   .split(',')
   .map(item => item.trim())
   .filter(item => item !== '');
}Copy

Why This Is Better

• Removes unnecessary spaces
• Filters empty entries
• Prevents unexpected blank values
• Improves data reliability

This version is ideal for production Vue.js applications.

Method 3: Using Vue Computed Properties (Reactive Approach)

If you want the array to automatically update whenever the string changes, use a computed property.

Example

<template>
 <div&gt
   <input v-model="myString" />
   <p>{{ myArray }}</p>
 </div&gt
</template>
<script>
export default {
 data() {
   return {
     myString: "apple,banana,cherry",
     separator: ",",
   };
 },
 computed: {
   myArray() {
     return this.myString
       .split(this.separator)
       .map(item => item.trim())
       .filter(Boolean);
   },
 },
};
</script>Copy

Why Computed is Powerful

• Automatically updates when data changes
• Cached for performance
• Clean template logic
• Ideal for reactive transformations

Use computed when conversion should always stay in sync with user input.

Method 4: Vue 3 Composition API (Modern Approach)

If you are using Vue 3, the Composition API is recommended.

Example with <script setup>

<template>
 <div>
   <input v-model="csv" />
   <p>{{ array }}</p>
 </div>
</template>
<script setup>
import { ref, computed } from 'vue'
const csv = ref("apple,banana,cherry");
const separator = ref(",");
const array = computed(() =>
 csv.value
   .split(separator.value)
   .map(item => item.trim())
   .filter(Boolean)
);
</script>Copy

Benefits

• Cleaner logic
• Better scalability
• Ideal for reusable composables
• Preferred in modern Vue applications

Method 5: Converting JSON String to Array in Vue

Sometimes APIs return arrays as JSON strings:

‘[“apple”,”banana”,”cherry”]’

In that case, use:

const array = JSON.parse(jsonString);

Important

• Only use JSON.parse() if the string is valid JSON
• Wrap inside try/catch to prevent runtime errors

Example:

try {
 this.convertedArray = JSON.parse(this.myString);
} catch (error) {
 console.error("Invalid JSON format");
}Copy

Method 6: Convert String to Character Array

If you want each character as an array element:

const charArray = Array.from(this.myString);

Or:

const charArray = […this.myString];

Use Case

• Character validation
• Password strength checks
• Emoji-safe character splitting

Handling Edge Cases (Expert Tips)

To rank well and write production-grade Vue code, always handle:

1. Null or Undefined Values

if (!this.myString) return [];

2. Numeric Conversion

this.myString
 .split(',')
 .map(item => Number(item.trim()))
 .filter(num => !isNaN(num));Copy

3. Complex CSV (Quoted Commas)

Simple split(‘,’) fails when values contain commas inside quotes.

Example:

“Doe, John”,35,”New York, NY”

For real CSV parsing, use a CSV parser library instead of manual splitting.

When to Use Each Method

FAQs

Q) How do I convert a comma separated string to an array in Vue?

A) Use:

this.myString.split(',')

For production:

this.myString.split(',').map(s => s.trim()).filter(Boolean)Copy

Q) Should I use method or computed in Vue for string to array?

A)

• Use computed for reactive automatic updates.
• Use methods when triggered by user actions.

Q) How to convert JSON string to array in Vue?

A) Use:

JSON.parse(jsonString)

Only if the string is valid JSON.

Q) How do I remove spaces while converting string to array?

A) Use .trim():

.split(‘,’).map(s => s.trim())

Conclusion

Converting a string to an array in Vue.js is simple, but writing production-ready code requires: