How to use v-model.lazy to implement lazy binding of input box data in Vue

How to use v-model.lazy in Vue to implement delayed binding of input box data

In Vue, the v-model directive is used to implement two-way data binding. When the user modifies the data in the input box, the data bound on the interface will be updated synchronously. However, in some scenarios, we hope that the data in the input box will not be updated to the bound data in real time, but will wait until the user completes the input before performing data binding. At this time, we can use the v-model.lazy instruction to implement delayed binding of input box data.

The v-model.lazy directive is a variant of the v-model directive, used to delay data binding until the input box loses focus or the Enter key is pressed. That is to say, when using the v-model.lazy directive, the data of the input box will be updated to the bound data only when the user completes the input.

When using the v-model.lazy directive, you need to pay attention to the following points:

1. The v-model.lazy directive is only valid for form elements such as text, textarea, and select.
2. The v-model.lazy directive needs to be used together with the v-model directive.
3. The v-model.lazy directive will trigger data binding only when the input box loses focus or the Enter key is pressed.

The following is an example of using the v-model.lazy directive:

<template>
  <div>
    <input type="text" v-model.lazy="message">
    <p>{{ message }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: ''
    }
  }
}
</script>

In this example, we create an input box and use the v-model.lazy directive to The data in the input box is two-way bound to the message variable. When the user enters data in the input box, the data in the input box is not immediately updated to the message variable. Data binding is performed until the user loses focus or presses the Enter key. On the page, we use a p tag to display the value of the message variable.

Through this example, we can see that using the v-model.lazy directive can easily implement delayed binding of input box data, making the interface more friendly and natural.

To summarize, in Vue, if you want to implement delayed binding of input box data, you can use the v-model.lazy directive. Just remember that the v-model.lazy directive is only valid for form elements such as text, textarea, and select, and needs to be used together with the v-model directive. Data binding will be triggered when the input box loses focus or the Enter key is pressed. Can.

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