An error occurred with vue.js .sync: it cannot read a property that is undefined

Example of my child component code:

<div>
                <label>Label</label>
                <VTextField
                  :value="addOnLabel"
                  @input="$emit('update:addOnLabel', $event.target.value)"
                  solo
                  outline
                  reverse
                  type="text"
                />
              </div>

props: {
    addOnLabel: {},
  },

My parent component structure is as follows:

<MultiplierDropDown :addOnLabel.sync="addOnLabel"/>

Issue Encountered: While inputting into the field, an error message appears -

Error in v-on handler: "TypeError: Cannot read property 'value' of undefined"

Answer №1

Consider substituting the $event.target.value with simply $event

Answer №2

When using a <v-text-field>, the @input event will emit the value of the model that is bound to it.

Contrary to a regular <input>, where you would normally use

"$emit('update:addOnLabel', $event.target.value)"
, with <v-text-field> you simply need to use
"$emit('update:addOnLabel', $event)"

Answer №3

Consider substituting

@input="$emit('update:addOnLabel', $event.target.value)"

with

v-on:input.native="$emit('update:addOnLabel', $event.target.value)"

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