What syntax is used to write vue files?

As a modern front-end framework, the syntax used by Vue has also undergone some changes compared to traditional front-end development languages. Vue.js files are mainly files with the .vue suffix, and they use special syntax to implement component functions. Let’s take a closer look at the grammatical features of Vue files.

Vue files are mainly divided into three parts: template (template), script (script) and style (style).

1. template (template) part

The template part is the component template part, which uses the specified template syntax to describe the rendering output of a Vue component. Vue uses a template syntax similar to HTML, but is more powerful than HTML. The specific syntax is as follows:

<template>
  <div>
    {{ message }}
  </div>
</template>

In the template, we can use double curly brace syntax ({{}}) to bind data, and also supports instruction syntax to achieve richer functions. For example, the v-for directive can render a set of data in a loop, and the v-if directive performs conditional rendering based on the value of an expression.

In addition, Vue’s template syntax also supports slots, components and other functions, making it easy to build complex page structures.

2. script (script) part

The script part is the component logic part of Vue, which is used to process data and events within the component. The specific syntax is as follows:

<script>
  export default {
    data() {
      return {
        message: 'Hello Vue.js!'
      }
    },
    methods: {
      handleClick() {
        console.log('Clicked!')
      }
    }
  }
</script>

In script, we can use the data attribute to declare the data inside the component, and then use the methods attribute to define the methods within the component. Data and methods within the component can be accessed through this. If we need to use other components inside the component, we can use the import syntax to introduce them.

3. style (style) part

The style part is the component style part of Vue, which can be written through preprocessors SCSS, LESS, etc. The specific syntax is as follows:

<style lang="scss">
  .message {
    font-size: 16px;
    color: #333;
  }
</style>

In style, we can write the style code of the component, or we can use the CSS preprocessor to process the style.

The above is the main syntax structure of Vue files. Due to the adoption of HTML-like template syntax and a more flexible component model, Vue's development efficiency and code maintainability have been greatly improved.

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