How to render in vue

Vue.js is a popular front-end framework. Its main job is to bind data and views and automatically render the correct content.

In Vue.js, views are usually rendered using the following methods:

1. Use interpolation expressions {{}} for data binding

Vue .js supports using interpolation expressions in templates for data binding. Interpolation expressions are one of the most basic directives of Vue.js and are used to bind data into templates. Vue.js uses Mustache syntax (i.e. double braces) to insert expressions into HTML templates.

For example, the following template will render a simple message:

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

In the Vue.js instance, you can set a value for the message attribute, which will be dynamically rendered in the template Out:

new Vue({
    el: '#app',
    data: {
        message: 'Hello, Vue.js!'
    }
});

This will render a div tag containing the "Hello, Vue.js!" message.

2. Use v-bind directive for attribute binding

The v-bind directive is used to bind data to attributes of HTML elements. For example, in the following code, v-bind binds the title attribute to the msg string variable:

<div v-bind:title="msg">
    Hover your mouse to see the title
</div>

In the Vue.js instance, you can set a value for the msg attribute and the value will be dynamic in the template Rendered:

new Vue({
    el: '#app',
    data: {
        msg: 'Hello, Vue.js!'
    }
});

When the user hovers the mouse pointer over this element, the browser displays a tooltip containing the value of the msg attribute.

3. Use the v-for directive for loop rendering

Vue.js uses the v-for directive to render the list, which will render the list based on each item in the data source. Render an HTML fragment repeatedly. For example, in the following code, the v-for directive will render each string in the messages array as a li element:

<ul>
    <li v-for="message in messages">{{ message }}</li>
</ul>

In the Vue.js instance, you can set an array for the messages attribute, which The array will be rendered dynamically in the template:

new Vue({
    el: '#app',
    data: {
        messages: ['Hello', 'Vue', 'JS']
    }
});

This will render an unordered list of three messages.

4. Use the v-if and v-show directives to render elements conditionally

Both the v-if and v-show directives can be used to conditionally render elements in templates element. The v-if directive renders an element conditionally based on the evaluation of an expression, while the v-show directive shows or hides an element via CSS instead of completely rendering or destroying it.

For example, in the following code, the h1 element on the page will be rendered conditionally, depending on the value of the showHeading variable:

<h1 v-if="showHeading">This is the heading</h1>

In the Vue.js instance, you can set the showHeading property A value that will be rendered dynamically in the template:

new Vue({
    el: '#app',
    data: {
        showHeading: true
    }
});

If the showHeading value is true, the h1 element will be rendered, otherwise it will not be rendered.

Summary

The above are some basic rendering techniques in Vue.js. Understanding and mastering the rendering working principles and techniques of Vue.js is the key to developing efficient and maintainable web applications. Vue.js provides a wealth of instructions and options to simplify the processing of data binding and rendering, while improving development efficiency.

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