javascript - How does vue-router distinguish between to and from in watch?

Question

created () {
    this.getData()
},
watch: {
    $route (to, from) {
        // 执行ajax请求，但只希望在进入时请求，离开时不希望进行请求。
        this.getData()
    }
}

The current situation is that the router makes requests when entering or leaving. How to solve unnecessary requests?

Thanks you in advance.

Answer 1

beforeRouteEnter is better?

Answer 2

Use routing hook function

beforeEnter

or component hook function

beforeRouteEnter