Property computation being initiated before property initialization

I am encountering an issue in my Vue application where I am trying to filter an array received from map getters based on a type prop within a computed property. Despite verifying that both the array elements and the prop are strings, the filtering process is not functioning correctly. It appears that the computed property may be called before the prop is fully initialized with a value. Can someone provide assistance with this problem?

all: 'mdm/all', // 'mdm' denotes module name and 'all' represents the state

prop: [type]

Within the computed property, there is a method named

getData() {
const filteredData = this.all.filter(ele => ele.type === this.type.toLowerCase());
return filteredData.map(item => (
 {name: item.name,
  orderNo: item.order_no
 });
}

Despite both ele.type and this.type showing similar string values (e.g., 'expired'), the resulting filteredData always ends up as an empty array. I am unsure of what might be causing this issue.

Answer №1

To gain insight into the inner workings of .filter(), one can insert a console log within it, as shown below:

this.all.filter(ele => { 
    console.log(`${ele.type} === ${this.type.toLowerCase()}?`, ele.type === this.type.toLowerCase());
    return ele.type === this.type.toLowerCase(); 
})`

This code snippet will output the result of

ele.type === this.type.toLowerCase()
during each iteration for easier debugging and understanding.

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