Exploring the integration of methods in Vue.js components

Within my Vuejs project, I developed a new form component and integrated it into the main index component. This new component needs to validate certain fields, with validation methods already created in the parent component. However, I am facing difficulties using these functions within the child components even after researching various solutions online.

Parent Component Example:

<div v-if="operation.operationName=='addUser'">
  <add-user-form
    :module="module"
    :operation="operation"
  >
  </add-user-form>
</div>
javascriptvue.jsmethodsvue-component

Answer №1

If you have a child component called add-user-form, you can implement a custom event for when a user submits or edits a field.

Although I'm not familiar with the structure of your child component, here is an example of how you could set it up:

Child Component

<label>
  Username:
  <input
    v-on:input="$emit('usernameChanged', $event.target.value)"
  >
</label>

Parent Component

<div v-if="operation.operationName=='addUser'">
  <add-user-form
    :module="module"
    :operation="operation"
    v-on:usernameChanged="validateUsername"
  >
  </add-user-form>
</div>

Make sure to add a method called validateUsername in the parent component:

methods:{
  validateUsername(value){
    // Validate username logic goes here
  }
}

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