How to Fix Vue Writable Computed

The Problem

In this quick-fix, you will learn creating computed with both get and set. This matters because writable computed allows v-model on derived state. In real-world applications, this pattern appears in two-way bound computed values.

The Wrong Way

const fullName = computed(() => firstName.value + " " + lastName.value);
// Read-only computed

Incorrect implementation

The Right Way

const fullName = computed({
  get: () => `${firstName.value} ${lastName.value}`,
  set: (val) => {
    [firstName.value, lastName.value] = val.split(" ");
  }
});

Correct implementation with Composition API

Prevention

• Always use the official API
• Follow Vue best practices
• Test your implementation
• Document your patterns

FAQ

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