vue中光标自动显示到指定的input框内

1、给input加上ref;

1 <v-otp-input
2    ref="inputName"
3    class="opt-input"
4    length="9"
5    type="number"
6    pattern="\d*"
7    v-model="payNum"
8    plain
9   ></v-otp-input>

2、一进来就执行放在mounted里；

1  mounted(){
2     this.$nextTick(() => {
3       this.$refs.inputName.focus();
4     })
5   },

参考文档

https://www.cnblogs.com/clark1990/p/16498108.html