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ember/template-no-whitespace-for-layout

Formatting of text through the use of multiple whitespace is entirely visual, and therefore is incompatible with screen-reading assistive technology tools.

The rule applies to the content of Handlebars AST TextNodes, and performs a RegExp search for two consecutive white space characters that might indicate the use of whitespace used for layout.

Examples

This rule forbids the following:

<template>
  Mon.&nbsp;&nbsp;&nbsp;&nbsp;Eggs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tomato soup&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;House salad<br>
  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Bacon&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Hamburger&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Fried chicken<br>
  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Toast&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Onion rings&nbsp;&nbsp;&nbsp;&nbsp;Green beans<br>
  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cookie&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mashed potatoes
</template>

This rule allows the following:

<template>
  <p>Start to finish</p>
</template>
<template>
  <p>Start&nbsp;to&nbsp;Finish</p>
</template>

Migration

To fix issues caused by using whitespace for layout, the following are recommended:

  • use the appropriate HTML markup to contain the information
  • use CSS to add padding or margins to the semantic HTML markup

References