ember/template-no-html-comments

April 20, 2026 · View on GitHub

💼 This rule is enabled in the 📋 template-lint-migration config.

🔧 This rule is automatically fixable by the --fix CLI option.

Disallow HTML comments in templates. HTML comments will be visible in the rendered output, which may expose sensitive information or clutter the DOM.

Rule Details

This rule disallows HTML comments (<!-- -->) in templates and suggests using Glimmer comments ({{! }} or {{!-- --}}) instead.

Examples

Examples of incorrect code for this rule:

<template>
  <!-- This is an HTML comment -->
  <div>Content</div>
</template>

Examples of correct code for this rule:

<template>
  {{! This is a Glimmer comment }}
  <div>Content</div>
</template>

<template>
  {{!-- This is a block Glimmer comment --}}
  <div>Content</div>
</template>

References