no-unused-block-params.md

no-unused-block-params

This rule forbids unused block parameters except when they are needed to access a later parameter.

This rule forbids the following (unused parameters):

{{#each users as |user index|}}
  {{user.name}}
{{/each}}

This rule allows the following:

Allowed (used parameters):

{{#each users as |user|}}
  {{user.name}}
{{/each}}

{{#each users as |user index|}}
  {{index}} {{user.name}}
{{/each}}

Allowed (later parameter used):

{{#each users as |user index|}}
  {{index}}
{{/each}}