Getting Started with Handlebars

When you need to generate HTML dynamically, things can get messy fast.

Maybe you are building emails. Maybe you are creating PDF reports. Maybe you are rendering data from a backend into a clean layout. At first, writing plain HTML strings feels easy. But after a while, it becomes hard to read, hard to update, and easy to break.

That is where Handlebars helps.

Handlebars give you a simple way to create templates and fill them with dynamic data. Instead of mixing logic everywhere, you can keep your structure clean and your content flexible.

In this article, we will look at what Handlebars is, why people use it, and how to get started with it in a practical way.

What are Handlebars?

Handlebars is a templating engine.

It lets you write a template with placeholders and then replace those placeholders with real data when the template is rendered.

For example, instead of hardcoding a user’s name in HTML, you can write a placeholder and let Handlebars insert the actual value later.

A simple Handlebars template looks like this:

<h1>Hello, {{name}}!</h1>

If the data is:

{  "name": "John"}

The final output becomes:

<h1>Hello, John!</h1>

That is the basic idea. You write the structure once and then reuse it with different data.

Why use Handlebars?

Handlebars are useful because it keeps templates easy to understand.

Instead of building long HTML strings in JavaScript or backend code, you can write templates that look close to normal HTML. That makes them easier to read and maintain.

Here are a few reasons people like using it:

1. It keeps templates clean

Your HTML stays readable because dynamic values are inserted with simple placeholder syntax.

2. It supports reusable patterns

You can use loops, conditions, and helpers to avoid repeating the same code again and again.

3. It works well for generated content

Handlebars are commonly used for:

• email templates
• PDF templates
• report generation
• dynamic pages
• server-side rendering

4. It separates data from layout

This is probably the biggest benefit. Your template focuses on structure, while your application provides the data.

How Handlebars Works

Handlebars works with two main things:

• a template
• a data object

The template defines the layout and placeholders.

The data object contains the real values.

When Handlebars compiles the template and applies the data, it returns the final HTML.

The usual flow looks like this:

1. Write a template
2. Pass data into it
3. Render the final result

Simple, but very powerful.

Basic Handlebars Syntax

Let’s go through the most common Handlebars features.

1. Variables

Variables are the easiest part of Handlebars.

<p>Name: {{name}}</p><p>Email: {{email}}</p>

With this data:

{  "name": "Sarah",  "email": "sarah@example.com"}

The output becomes:

<p>Name: Sarah</p><p>Email: sarah@example.com</p>

2. Nested values

You can also access nested data.

<p>Company: {{company.name}}</p><p>Country: {{company.country}}</p>

Data:

{  "company": {    "name": "Enlear",    "country": "Sri Lanka"  }}

3. Conditions

Handlebars let you show content only when a condition is true.

{{#if isActive}}  <p>User is active</p>{{else}}  <p>User is inactive</p>{{/if}}

This is useful when some sections should appear only for certain data.

4. Loops

You can loop through arrays using each.

<ul>  {{#each skills}}    <li>{{this}}</li>  {{/each}}</ul>

Data:

{  "skills": ["HTML", "CSS", "Handlebars"]}

Output:

<ul>  <li>HTML</li>  <li>CSS</li>  <li>Handlebars</li></ul>

5. Comments

You can also add comments inside templates.

{{! This is a Handlebars comment }}

These comments are not included in the final output.

A Practical Example

Let’s say you want to create a simple profile card.

Here is the template:

<div class="card">  <h2>{{name}}</h2>  <p>Role: {{role}}</p>  {{#if bio}}    <p>{{bio}}</p>  {{/if}}  <h3>Skills</h3>  <ul>    {{#each skills}}      <li>{{this}}</li>    {{/each}}  </ul></div>

And here is the data:

{  "name": "Nimal",  "role": "Frontend Developer",  "bio": "Builds clean and responsive web interfaces.",  "skills": ["React", "MUI", "Handlebars"]}

The final result is a ready-to-render HTML block.

<div class="card">  <h2>Nimal</h2>  <p>Role: Frontend Developer</p>  <p>Builds clean and responsive web interfaces.</p>  <h3>Skills</h3>  <ul>    <li>React</li>    <li>MUI</li>    <li>Handlebars</li>  </ul></div>

This is where Handlebars starts to feel really useful. You can design the layout once and keep changing only the data.

Where Handlebars is Commonly Used

You may not use Handlebars for every frontend project today, but it is still very useful in many real-world cases.

Email templates

Emails often need dynamic usernames, order details, dates, or status messages. Handlebars make that easier.

PDF generation

If you generate PDFs from HTML, Handlebars is a great way to build report templates with dynamic data.

Backend rendering

Many backend systems use Handlebars to render HTML before sending it somewhere else.

Reusable report layouts

For systems that generate summaries, invoices, assessments, or dashboards, Handlebars provides a clean template structure.

Common Beginner Mistakes

When starting with Handlebars, a few things can be confusing.

Mixing too much logic into templates

Handlebars works best when templates stay focused on presentation. If the template becomes full of display logic, it becomes harder to maintain.

Try to prepare your data before passing it to the template.

Forgetting data structure

If your template uses {{company.name}}, your data must match that structure exactly. Even a small mismatch can make values disappear.

Repeating markup instead of using partials

For small templates, repetition may feel harmless. But in larger templates, partials save a lot of time.

Tips for Getting Started with Handlebars

If you are just getting started, these habits will help:

• keep templates simple
• use meaningful data names
• move repeated sections into partials
• use helpers for formatting, not for heavy business logic
• test templates with real data, not just sample placeholders

A good Handlebars template should be easy to read even for someone seeing it for the first time.

Why Handlebars Still Matters

Some people hear “templating engine” and think it sounds old-fashioned.

But the problem Handlebars solves is still very real.

Whenever you need to combine a fixed layout with changing data, templating becomes useful. And Handlebars remains one of the easiest tools for doing that cleanly.

It is not about being trendy. It is about being practical.

If your project includes generated HTML, reports, emails, or reusable content blocks, Handlebars is still a very good choice.

Final Thoughts

Handlebars are simple, and that is exactly why it is useful.

You do not need a huge framework to benefit from clean templates. Sometimes you just need a reliable way to insert dynamic data into a well-structured layout.

That is what Handlebars gives you.

It helps you write templates that are easier to read, easier to reuse, and easier to maintain.

Connect with Me

LinkedIn: https://www.linkedin.com/in/pathumscj