Interactions (インタラクション)

ユーザーのインタラクションするかを変更するユーティリティクラスです。

Text selection

ユーザのテキスト選択を制御するクラスです。

This paragraph will be entirely selected when clicked by the user.

This paragraph has default select behavior.

This paragraph will not be selectable when clicked by the user.

<p class="user-select-all">This paragraph will be entirely selected when clicked by the user.</p>
<p class="user-select-auto">This paragraph has default select behavior.</p>
<p class="user-select-none">This paragraph will not be selectable when clicked by the user.</p>

Pointer events

Bootstrapには、インタラクションを防止したり、追加したりするためのカーソル用クラス pe-none と pe-auto を用意しています。

This link can not be clicked.

This link can be clicked (this is default behavior).

This link can not be clicked because the pointer-events property is inherited from its parent. However, this link has a pe-auto class and can be clicked.

<p><a href="#" class="pe-none" tabindex="-1" aria-disabled="true">This link</a> can not be clicked.</p>
<p><a href="#" class="pe-auto">This link</a> can be clicked (this is default behavior).</p>
<p class="pe-none"><a href="#" tabindex="-1" aria-disabled="true">This link</a> can not be clicked because the <code>pointer-events</code> property is inherited from its parent. However, <a href="#" class="pe-auto">this link</a> has a <code>pe-auto</code> class and can be clicked.</p>

The .pe-none class (and the pointer-events CSS property it sets) only prevents interactions with a pointer (mouse, stylus, touch). Links and controls with .pe-none are, by default, still focusable and actionable for keyboard users. To ensure that they are completely neutralized even for keyboard users, you may need to add further attributes such as tabindex="-1" (to prevent them from receiving keyboard focus) and aria-disabled="true" (to convey the fact they are effectively disabled to assistive technologies), and possibly use JavaScript to completely prevent them from being actionable. For form controls, consider using the disabled HTML attribute instead.

Sass

Utilities API

Interaction utilities は utilities API scss/_utilities.scss で宣言されています。 Learn how to use the utilities API.

    "user-select": (
      property: user-select,
      values: all auto none
    ),
    "pointer-events": (
      property: pointer-events,
      class: pe,
      values: none auto,
    ),