Vue templates are HTML enhanced with directives and interpolation — you write markup that looks like HTML, plus special attributes (directives, starting with v-) and {{ }} for dynamic values.
<template>
<h1>{{ title }}</h1> <!-- inserts the value of `title` -->
<p>{{ count * 2 }}</p> <!-- any JS expression works -->
<p>{{ isActive ? "On" : "Off" }}</p> <!-- ternaries, method calls, etc. -->
</template>
{{ }} evaluates a JavaScript expression (not statements) and renders the result as text, updating automatically when the data changes.
<template>
<p v-if="loggedIn">Welcome</p> <!-- conditional rendering -->
<li v-for="item in items" :key="item.id">{{ item.name }}</li> <!-- loops -->
<img :src="imageUrl" /> <!-- v-bind: bind an attribute -->
<button @click="submit">Send</button> <!-- v-on: handle an event -->
<input v-model="name" /> <!-- two-way binding -->
</template>
<a :href="url">link</a> <!-- : is short for v-bind: -->
<button @click="fn">go</button> <!-- @ is short for v-on: -->
The : (bind) and @ (on) shorthands are the idiomatic way to write Vue — you'll rarely see the full v-bind:/v-on: form.
<div class="static">{{ text }}</div> <!-- {{}} for CONTENT -->
<div :class="dynamicClass"></div> <!-- :attr for ATTRIBUTES -->
Use {{ }} for text content and :attr for attribute values — you can't put mustaches inside an attribute.
Template syntax is the heart of writing Vue UIs.
The combination of {{ }} interpolation and v- directives (with :/@ shorthands) lets you express dynamic, reactive UI declaratively — readable like HTML, but data-driven.
Mastering the common directives is most of what day-to-day Vue development involves.