Currently, I am utilizing v-model to bind one input and name for the other. My main focus is on exploring the various methods for retrieving and manipulating their

I created a form with various input fields and upon submission, I am displaying the data in a modal. Although it functions correctly, I have concerns regarding the cleanliness of my code.

Below is the simplified HTML structure:

<div id="app">
  <form @submit.prevent="getValues">
    <label>Last Name: </label><input type="text" name="lastName">
    <br>
    <button>Submit</button>
  </form>
</div>

The Vue instance and getValues function are as follows:

let app = new Vue({
    el: '#app',
    data:{
        lastName: ''
    },
    methods:{
        getValues(submitEvent){
            this.lastName = submitEvent.target.elements.lastName.value
        }
    }
})

To simplify the code, I decided to implement v-model:

Modified HTML:

<div id="app">
  <form @submit.prevent="getValues">
    <label>First Name: </label><input type="text" v-model="firstName">
    <button>Submit</button>
  </form>
</div>

Updated Vue section:

let app = new Vue({
    el: '#app',
    data:{
        firstName: ''
    },
    methods:{
        getValues(submitEvent){
            firstName = this.firstName
        }
    }
})

Although the implementation works, I find firstName = this.firstName confusing. Changing the variable names did not yield the desired results. Is the variable "firstName" inside getValues actually utilized, or is the value rendered due to two-way binding using v-model (which may be challenging to ascertain since the modal only appears after form submission)?

Here's a JSFiddle showcasing both approaches.

Which approach is more appropriate? Can they be used interchangeably? What sets them apart?

Answer №1

Two possible approaches include utilizing events or 2-way binding.

Upon form submission, the associated event triggers a method (@submit.prevent="getValues"). Within this method, the value of name is extracted and used to set the lastName property.

By using v-model="firstName", Vue establishes a bidirectional binding relationship between the input field's value and the firstName property.

The key distinction lies in the immediate update of the property as you type into the input box. Vue manages the change event in the background, ensuring that the property reflects any modifications. Similarly, altering the data property through another means will also update the value displayed in the input box.

A third option involves 'simple' binding, which can be achieved by employing the v-bind tag. While this approach updates the data property similarly, it does not sync changes made elsewhere back to the input box value.

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