---
category: Reactivity
---

# reactiveOmit

Reactively omit fields from a reactive object.

## Usage

### Basic Usage

```ts
import { reactiveOmit } from '@vueuse/core';

const obj = reactive({
  x: 0,
  y: 0,
  elementX: 0,
  elementY: 0,
});

const picked = reactiveOmit(obj, 'x', 'elementX'); // { y: number, elementY: number }
```

### Predicate Usage

```ts
import { reactiveOmit } from '@vueuse/core';

const obj = reactive({
  bar: 'bar',
  baz: 'should be omit',
  foo: 'foo2',
  qux: true,
});

const picked = reactiveOmit(obj, (value, key) => key === 'baz' || value === true);
// { bar: string, foo: string }
```

### Scenarios

#### Selectively passing props to child

```vue
<script setup lang="ts">
import { reactiveOmit } from '@vueuse/core';

const props = defineProps<{
  value: string;
  color?: string;
  font?: string;
}>();

const childProps = reactiveOmit(props, 'value');
</script>

<template>
  <div>
    <!-- only passes "color" and "font" props to child -->
    <ChildComp v-bind="childProps" />
  </div>
</template>
```

## Type Declarations

```ts
export type ReactiveOmitReturn<T extends object, K extends keyof T | undefined = undefined> = [
  K,
] extends [undefined]
  ? Partial<T>
  : Omit<T, Extract<K, keyof T>>;
export type ReactiveOmitPredicate<T> = (value: T[keyof T], key: keyof T) => boolean;
export declare function reactiveOmit<T extends object, K extends keyof T>(
  obj: T,
  ...keys: (K | K[])[]
): ReactiveOmitReturn<T, K>;
export declare function reactiveOmit<T extends object>(
  obj: T,
  predicate: ReactiveOmitPredicate<T>,
): ReactiveOmitReturn<T>;
```
