The process of including or excluding an item in an array

There are 2 toggle buttons. If the value is true, it will be added to the array, otherwise the element will be removed.

data:

originality: []

toggles:

<toggle id='1' ref='toggleOriginal'> Click </toggle>
<toggle id='2' ref='toggleAnalog'> Click </toggle>

methods:

 if(this.$refs.toggleOriginal.isActive) {
    this.originality.push(this.$refs.toggleOriginal.id);
 } else {
    this.originality = this.originality.filter((item) => {
      return item == this.$refs.toggleOriginal.id;
   });
 }

 if(this.$refs.toggleAnalog.isActive) {
    this.originality.push(this.$refs.toggleAnalog.id);
  } else {
    this.originality = this.originality.filter((item) => {
      return item == this.$refs.toggleAnalog.id;
    });
  }

And the same for the second button. The `isActive` parameter checks for `true/false`. The issue arises when both toggles are set to `true` and then one needs to be changed to `false`, resulting in the wrong element being removed. Is there a different functionality that should be used in this situation?

Answer №1

To eliminate an element from an array using the filter method, it is important to check for non-equality. In your provided example, you are using equality which will result in removing all instances of the item.

this.uniqueArray = this.uniqueArray.filter((item) => {
      return item !== this.$refs.toggleUnique.id;
   });

Alternatively, you can use splice as shown below:

const index = this.uniqueArray.indexOf(this.$refs.toggleUnique.id)
this.uniqueArray.splice(index, 1)

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