This tutorial aims to guide you through the template syntax of Vue.js, an increasingly popular JavaScript framework. Vue's template syntax provides a simple and intuitive way to tie data and methods to the HTML of your application.
By the end of this tutorial, you will:
Prerequisites: Basic knowledge of JavaScript and HTML.
Vue.js uses a template syntax that allows you to declaratively render dynamic data to the DOM. You can use Vue's familiar HTML-based syntax to declare your application's components and efficiently update them when your data changes.
The most basic form of data binding is text interpolation using the "Mustache" syntax (double curly braces):
<!-- This is a Vue.js template -->
<span>Message: {{ msg }}</span>
The msg
inside the double curly braces is a property of the Vue instance. Vue will replace this placeholder with the actual value of msg
when rendering the template.
To bind elements' attributes, you can use the v-bind
directive. This is particularly useful for dynamic attributes:
<!-- Bind the 'href' attribute -->
<a v-bind:href="url">Link</a>
In this case, url
is a property of the Vue instance.
v-if
is used to conditionally render a block:
<!-- This paragraph will only be rendered if 'seen' is truthy -->
<p v-if="seen">Now you see me</p>
v-for
allows you to render a list of items based on an array:
<!-- Render a list of items -->
<li v-for="item in items">
{{ item.text }}
</li>
Let's see some practical examples:
<!-- Vue template -->
<span>{{ message }}</span>
<!-- Vue instance -->
<script>
new Vue({
el: '#app',
data: {
message: 'Hello Vue!'
}
})
</script>
Here, message
is a property of our Vue instance. Vue will replace {{ message }}
with the text 'Hello Vue!' when rendering.
<!-- Vue template -->
<a v-bind:href="url">Link</a>
<!-- Vue instance -->
<script>
new Vue({
el: '#app',
data: {
url: 'https://vuejs.org/'
}
})
</script>
In this example, the href
attribute of the anchor tag is bound to the url
property of the Vue instance.
In this tutorial, we covered the basics of Vue.js template syntax, including interpolation, v-bind, v-if, and v-for directives. As next steps, you might want to explore other directives like v-on for event handling and v-model for two-way data binding.
Additional Resources:
- Vue.js Guide
- Vue.js API
data
property that includes an array of objects. Use v-for
to display the objects in a list.data
property that includes a boolean value. Use v-if
to conditionally render a message based on the boolean’s value.Solutions:
1. Vue.js List Rendering
2. Vue.js Conditional Rendering
To further practice, try to combine the directives you've learned in a single application. For example, you could create a to-do list where each item is only visible if it's not marked as completed.