template-no-redundant-fn.md

ember/template-no-redundant-fn

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

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

The fn helper can be used to bind arguments to another function. Using it without any arguments is redundant because then the inner function could just be used directly.

This rule is looking for fn helper usages that don't provide any additional arguments to the inner function and warns about them.

Examples

This rule forbids the following:

<button {{on 'click' (fn this.handleClick)}}>Click Me</button>

This rule allows the following:

<button {{on 'click' this.handleClick}}>Click Me</button>

<button {{on 'click' (fn this.handleClick 'foo')}}>Click Me</button>

References

• Ember Guides
• fn API documentation