.hbs File — Handlebars Template

Handlebars is a logic-less templating language that extends Mustache with block helpers, partials, and custom helpers while maintaining a clean separation between presentation and logic. HBS files contain HTML with double-curly-brace expressions ({{variable}}) for outputting values, block expressions ({{#if}}, {{#each}}, {{#with}}) for control flow, partials ({{> partial}}) for template composition, and helpers for custom formatting logic. Handlebars was created by Yehuda Katz in 2010 and has been widely adopted in both server-side (Express.js) and client-side (Ember.js) applications. The format's philosophy of keeping complex logic out of templates encourages clean architecture where data transformation happens before reaching the template. Handlebars compiles templates to JavaScript functions for efficient rendering. The format is used in email templating systems, CMS themes, documentation generators, and static site builders. Handlebars' precompilation feature allows templates to be compiled at build time, reducing client-side overhead. The ecosystem includes custom helpers for common operations like date formatting, string manipulation, and conditional logic. Ember.js uses Handlebars (as HTMLBars/Glimmer) as its native template format.