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How to use vue inline

PHPz

May 25, 2023 pm 12:10 PM

Vue is a very powerful JavaScript framework that can help us quickly build interactive front-end pages. In Vue, the use of inline is also very common. Below we will introduce how to use Vue inline and related precautions.

1. The concept of Vue inline

In Vue, inline means embedding a Vue instance into an HTML tag. You can initialize a Vue instance inline to implement functions such as dynamic data binding and event processing. There are usually two ways to inline Vue. One is to embed Vue instances directly into HTML tags, and the other is to use Vue inline instructions.

2. Directly embed the Vue instance into the HTML tag

Directly embed the Vue instance into the HTML tag. You need to reference the Vue JS file in the HTML page and define Vue in the HTML tag. Instance options. The following is a simple example:

<html>
  <head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  </head>
  <body>
    <div id="app">
      {{ message }}
    </div>
    <script>
      var app = new Vue({
        el: '#app',
        data: {
          message: 'Hello, Vue!'
        }
      })
    </script>
  </body>
</html>

In the above example, the Vue JS file is first quoted in the head section. In the body part, we define a div with the id "app", then specify the id of the div with the el parameter in the Vue instance, define a message variable with the data parameter, and finally use "{{ message } inside the div tag }" to display the value of the variable. After the page is loaded, Vue will automatically update the value of the message to the page.

3. Vue inline instructions

Vue inline instructions can bind data and methods in Vue instances on some specific tags, thereby achieving more dynamic and powerful functions. Common inline instructions include v-bind, v-if, v-for, etc. Below we will take the v-bind instruction as an example to introduce the use of Vue inline instructions.

The v-bind directive is used to bind the data in the Vue instance to the attributes of the HTML tag. For example, we can use the v-bind directive to bind the message variable in the Vue instance to the title attribute on a button label to display the value of the variable when the mouse hovers:

<html>
  <head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  </head>
  <body>
    <div id="app">
      <button v-bind:title="message">Hover me</button>
    </div>
    <script>
      var app = new Vue({
        el: '#app',
        data: {
          message: 'Hello, Vue!'
        }
      })
    </script>
  </body>
</html>

In the above example , we used the v-bind directive to bind the message variable to the title attribute of the button label. At this point, when the mouse hovers over the button, the value of "Hello, Vue!" will be displayed.

It should be noted that the v-bind directive can also be used to bind other attributes such as styles and class names. For example, we can bind the color variable in the Vue instance to the background color of a div tag through the v-bind instruction to achieve dynamic background color transformation:

<html>
  <head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  </head>
  <body>
    <div id="app">
      <div v-bind:style="{ backgroundColor: color }">Hello, Vue!</div>
    </div>
    <script>
      var app = new Vue({
        el: '#app',
        data: {
          color: 'red'
        }
      })
    </script>
  </body>
</html>

In the above example, we use The v-bind directive binds the color variable to the style of a div tag to achieve the effect of dynamically changing the background color based on the color variable. It should be noted that in order to be consistent with the naming method of HTML attributes, Vue's attribute names are usually named in lowercase with horizontal lines. For example, background-color is replaced by backgroundColor.

4. Summary

Vue inline is one of the very common and practical functions in the Vue framework. Functions such as dynamic data binding and event processing can be quickly implemented by embedding Vue instances directly into HTML tags or using Vue inline instructions. It should be noted that when using Vue inline, we need to handle it carefully to avoid code confusion and difficulty in maintaining. At the same time, we also need to choose the appropriate inline method according to different needs to achieve the best development effect and user experience.

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