Alert: [Vue warning]: No valid handler found for event "click"

Question

Alert: [Vue warning]: No valid handler found for event "click"

Currently, I am utilizing Vue 2 with class syntax and Typescript with TSX syntax. Despite encountering similar inquiries before, none of the proposed solutions seem to fit my specific situation.

My scenario involves creating an object array and displaying these objects as custom HTML elements, referred to as Chips. Each Chip has a boolean property called 'selected'.

The array, named registerCategory, consists of objects with a name (essentially text) and a boolean called

is_selected</code, initialized as false by default.</p>
<p>This is how I have rendered my Array:</p>
<pre><code>{this.registerCategory.map((field, index) => (
    <ZChip
    position={'start'}
    id = {'field-' + index}
    value={field}
    selected={this.registerCategory[index].is_selected}
    onClick={this.onCategorySelect(index)}
    >
      {this.$t(this.registerCategory[index].name)}
    </ZChip>
))}

The above code successfully displays all elements. However, my challenge lies in achieving selection upon click.

I have implemented a function in a separate file named registration.mixin.ts (also where the array is defined within a computed block):

methods: {
    onCategorySelect(index: number): void {
      this.registerCategory[index].is_selected = true;
    },
}

The intention was for this function to alter the is_selected as only the selected element's boolean value. Sadly, I encountered the following error:

[Vue warn]: Invalid handler for event "click": got undefined

If anyone could provide guidance, a solution, or alternative approach, it would be greatly appreciated. Thank you! :)

typescript vue.js vuejs2 tsx vue-mixin

Answer 1

Answer №1

Have you already solved the problem? Unfortunately, I am unable to test it myself, but I strongly believe this solution will work, as it aligns with how indexes are managed in React (as far as I know):

  methods: {
    onCategorySelect(index: number): void {
      () => this.registerCategory[index].is_selected = true;
    },
  }

Answer 2

Have you already solved the problem? Unfortunately, I am unable to test it myself, but I strongly believe this solution will work, as it aligns with how indexes are managed in React (as far as I know):

  methods: {
    onCategorySelect(index: number): void {
      () => this.registerCategory[index].is_selected = true;
    },
  }

Answer 3

Answer №2

After closely examining my question and seeking guidance from my supervisor, I have identified two key issues in my code:

The first problem was that I mistakenly placed the array within the computed object. It dawned on me that arrays with custom types cannot be defined in the data object. Additionally, any content within a computed block is immutable. To address this, I moved the array to the same class where the other components of my code were situated (specifically where the ZChip elements are). I acknowledge that there may be a more optimal location for initializing the array, but for now, this setup suffices.

Another issue arose in the onClick function, where I needed to utilize an arrow function expression to invoke the corresponding function. The revised code snippet is as follows:

  {this.registerCategory.map((field, index) => (
    <ZidChip
    position="start"
    id={'field-' + index}
    value={field}
    selected={this.registerCategory[index].is_selected}
    onClick={() => this.onCategorySelect(index)}
    >
      {this.$t(this.registerCategory[index].name)}
    </ZidChip>
  ))}

The onCategorySelect method is defined as:

  private onCategorySelect(index: number): void {
    this.registerCategory[index].is_selected = !this.registerCategory[index].is_selected;
  }

Answer 4

After closely examining my question and seeking guidance from my supervisor, I have identified two key issues in my code:

The first problem was that I mistakenly placed the array within the computed object. It dawned on me that arrays with custom types cannot be defined in the data object. Additionally, any content within a computed block is immutable. To address this, I moved the array to the same class where the other components of my code were situated (specifically where the ZChip elements are). I acknowledge that there may be a more optimal location for initializing the array, but for now, this setup suffices.

Another issue arose in the onClick function, where I needed to utilize an arrow function expression to invoke the corresponding function. The revised code snippet is as follows:

  {this.registerCategory.map((field, index) => (
    <ZidChip
    position="start"
    id={'field-' + index}
    value={field}
    selected={this.registerCategory[index].is_selected}
    onClick={() => this.onCategorySelect(index)}
    >
      {this.$t(this.registerCategory[index].name)}
    </ZidChip>
  ))}

The onCategorySelect method is defined as:

  private onCategorySelect(index: number): void {
    this.registerCategory[index].is_selected = !this.registerCategory[index].is_selected;
  }

Alert: [Vue warning]: No valid handler found for event "click"

Answer №1

Answer №2

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