Implementation example of vue3 clear let arr = reactive([])

In Vue 3, if you have one to usereactiveThe responsive array created, and you want to clear this array, there are several ways to achieve it. Here are some common methods:

Method 1: Set the length to 0 directly

You can directly set the length of the array to 0, which will clear the contents of the array.

import { reactive } from 'vue';

let arr = reactive([]);

// Add some elements to the array(1, 2, 3);
(arr); // [1, 2, 3]

// Clear the array = 0;
(arr); // []

Method 2: Use splice method

You can usespliceMethod to delete all elements in the array.

import { reactive } from 'vue';

let arr = reactive([]);

// Add some elements to the array(1, 2, 3);
(arr); // [1, 2, 3]

// Clear the array(0, );
(arr); // []

Method 3: Use Method

You can also usefillMethod replaces all elements of the array withundefined, and set the length to 0.

import { reactive } from 'vue';

let arr = reactive([]);

// Add some elements to the array(1, 2, 3);
(arr); // [1, 2, 3]

// Clear the array(undefined);
 = 0;
(arr); // []

Which method to choose depends on your specific needs and code style. Generally speaking, set the length to 0 directly or usespliceThe method is a relatively common and concise approach.

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