vue $set entire array - Stack Overflow

Question

How to use $set to change the entire array

data: {
    arr: [1,2,3,4]
},
methods: {
    fun: function(){
        //改变一个元素
        this.$set(this.arr, 2, 'a3')
        //改变整个数组 应该怎么写
        //this.arr = [9,8,7]
    }
}

Answer 1

Direct assignment
this.arr = ['h', 'e', ​​'...'];

Answer 2

methods: {
    fun() {
        this.$set(this, arr, ['a', 'b', 'c'])
    },
    fun2() {
        this.arr = ['a', 'b', 'c']
    },
    fun3() {
        this.arr.splice(0, this.arr.length, 'a', 'b', 'c')
    }

}

Answer 3

$set is generally used to add key-value pairs to objects. Arrays can be directly assigned values. For data operations, js-related operations will be monitored.