单组件内部， props中属性的值 如何修改后？

单组件内部， props中属性的值 如何修改后？
报错信息
Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "show"
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props: {
show: {
type: Boolean,
default: false
}
},

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created(){
this.show=true;
},