props选项读取default值异常

props: {
	placeholder: {
		type: String,
                default: ‘请输入‘
         },
	value: {
		require: false
         }
 }    

props: {
	placeholder: {
		type: Array,
                default() {
                        return [1,2,3]
                }
         },
	value: {
		require: false
         }
 }