关于watch监听id变化

<script>
    export default {
        data() {
            return {
                form: {}
            }
        },
        props: {
            id:''
        },
        watch: {
            'id': function () {
                this.loadData();//watch监听props传来id的变化
            }
        },
        created() {
            this.loadData();
        },
        methods: {
            loadData() {
                var data = {
                    bidding_payment_id: this.id
                }
                this.$post('/goods/bidding/payment/detail', data, (res) => {
                    console.log('444', res)
                    if (!res.status) {
                        this.$message.error(res.message || '暂无数据！');
                        return;
                    }
                    this.form = res.data
                    // this.form.amount_1 = this.form.amount / 100 || '';
                    // this.form.freight_1 = this.form.freight / 100 || 0;
                    this.form.payment_time = this.loadTimeString(this.form.payment_time);
                    this.form.refund_time = this.loadTimeString(this.form.refund_time);
                })
            },

传值时要注意参数的类型！