The Vue template syntax abbreviation is VTL (View Template Language), which is a declarative programming language for building user interfaces. It is based on HTML but has more powerful data binding capabilities. Here are some examples of VTL:
Binding text:
<p>{
{ message }}</p>
In this example, message is a data attribute in the Vue instance, which will be rendered in the paragraph element.
Binding properties:
<img :src="imageUrl" :alt="imageAltText">
In this example, :src and :alt are binding attributes, which use VTL syntax to bind data attributes. :src is bound to the imageUrl property and :alt is bound to the imageAltText property.
Binding style:
<div :style="{ color: textColor, background-color: backgroundColor }"></div>
In this example, :style is bound to an object that contains the style properties and corresponding values to be applied. The data attributes here are textColor and backgroundColor.
Conditional rendering:
<p v-if="showMessage">{
{ message }}</p>
In this example, the v-if directive determines whether to render the paragraph element based on the value of the showMessage attribute in the Vue instance. If showMessage is true, the paragraph element will be rendered; otherwise, it will be hidden.
Loop rendering:
<ul>
<li v-for="item in itemList">{
{ item }}</li>
</ul>
In this example, the v-for directive will loop through the itemList array in the Vue instance and render a list item element for each array element. Within each list item element, item will be bound to the value of the current array element.
Event handling:
<button @click="handleClick">Click me</button>
In this example, @click means that when the user clicks this button, the handleClick method in the Vue instance will be called. This is a way of binding event handlers.
Components:
<my-component></my-component>
In this example, my-component is the tag name of a custom component. A component is a reusable block of code that can be used multiple times on a page. Components can contain templates, properties, and event handlers.
Interpolation:
<p>{
{ message }}</p>
In this example, { { message }} means to render the value of the message attribute in this paragraph element. This is an interpolation expression that can be used directly in templates.
filter:
<p>{
{ message | capitalize }}</p>
In this example, | means to apply a filter. capitalize is a custom filter that converts text to uppercase letters. Filters can be used to format data, convert strings, and more.
Binding properties:
<img :src="imageUrl" :alt="imageAltText">
In this example, :src and :alt are binding attributes, which use VTL syntax to bind data attributes. :src is bound to the imageUrl property and :alt is bound to the imageAltText property.
Computed properties:
<p>{
{ reversedMessage }}</p>
In this example, reversedMessage is a computed property. A computed property calculates a value based on other data properties; it does not directly modify the data. In this example, reversedMessage will calculate the reversed string based on the value of the message attribute.
method:
<p>{
{ reversedMessage() }}</p>
In this example, reversedMessage is a method defined in the Vue instance. Methods are executable actions that do not directly render the template. In this example, the reversedMessage method returns a reversed string.
Bind variables:
<script>
new Vue({
el: '#app',
data: {
message: 'Hello Vue!'
}
})
</script>
<p>{
{ message }}</p>
In this example, message is a variable defined in the Vue instance. It will be rendered in the template, and the user can change the value of the variable by modifying the template. Note that variables need to be defined in the Vue instance to use them.
Template reuse:
<template v-if="showTemplate">
<p>This is a reusable template.</p>
</template>
In this example, <template>tags are used to define a reusable template. This template can be rendered via the v-if directive. This allows the same template to be reused in different places.
The above are some common Vue template syntax, through which complex user interfaces can be implemented. It should be noted that these syntaxes need to be registered in the Vue instance to be used.