javascript - vue component binding computed method return value, binding exception occurs?

Question

As shown in the figure, the above code component div.star is bound to the value returned by the calculated attribute method. This is the calculated attribute and finally a binding exception occurs.

淡淡烟草味 · Answer

props: {
    size: {
        type: Number
    },
    score: {
        type: Number
    }
},

computed: {
    starType() {
        return "star-" + this.size;
    }
}

女神的闺蜜爱上我 · Answer

:class="starType" 改成 v-model="starType"

女神的闺蜜爱上我 · Answer

computed seems to be written in props, so the error is reported