Vue2 upgrade Vue3 error: Right-hand side of 'instanceof' is not an object

Attribute prop setting multi-type error reporting:

 Vue2 writing method: support to be separated by vertical bars. Vue2 Props

expandLevel: {
	type: Number | String,
	default: 1,
},

Vue3 writing method: change to an array, does not support vertical bar separation. Vue3 Props

expandLevel: {
	type: [Number, String],
	default: 1,
}