path: root/files/ja/web/css/css_flexible_box_layout/mixins/index.html

---
title: クロスブラウザのフレックスボックスのミックスイン
slug: Web/CSS/CSS_Flexible_Box_Layout/Mixins
tags:
  - CSS
  - CSS フレックスボックス
  - ミックスイン
  - リファレンス
translation_of: Web/CSS/CSS_Flexible_Box_Layout/Mixins
---
<div>{{cssref}}</div>

<p class="summary">この記事では、 flexbox を現在のブラウザーのネイティブ対応を利用して使いこなしたい人のための一連のミックスインを紹介します。</p>

<p>このセットは次のものを使用します。</p>

<ul>
 <li>2009年時点の 'box' 構文 (Firefox や古い WebKit) を使用したフォールバックと、接頭辞付きの構文 (IE10, flex ラッピングのない WebKit ブラウザー)</li>
 <li>最終的な標準の構文 (Firefox, Safari, Chrome, IE11+, Edge, Opera)</li>
</ul>

<p>原文:</p>

<ul>
 <li><a href="http://dev.opera.com/articles/view/advanced-cross-browser-flexbox/">http://dev.opera.com/articles/view/advanced-cross-browser-flexbox/</a></li>
</ul>

<p>参考文献:</p>

<ul>
 <li><a href="http://w3.org/tr/css3-flexbox/">http://w3.org/tr/css3-flexbox/</a></li>
 <li><s><a href="http://the-echoplex.net/flexyboxes/">http://the-echoplex.net/flexyboxes/</a></s></li>
 <li><a href="http://msdn.microsoft.com/en-us/library/ie/hh772069(v=vs.85).aspx">http://msdn.microsoft.com/en-us/library/ie/hh772069(v=vs.85).aspx</a></li>
 <li><a href="http://css-tricks.com/using-flexbox/">http://css-tricks.com/using-flexbox/</a></li>
 <li><a href="https://css-tricks.com/snippets/css/a-guide-to-flexbox/">A Complete Guide to Flexbox | CSS-Tricks</a></li>
 <li><a href="https://demos.scotch.io/visual-guide-to-css3-flexbox-flexbox-playground/demos/">Visual Guide to CSS3 Flexbox: Flexbox Playground |</a></li>
</ul>

<div class="note"><strong>メモ:</strong> ミックスインは、現在ブラウザーでは対応されていません。下記の大部分を実行するには、代わりに CSS プリプロセッサーを使用する必要があるでしょう。しかし、 CSS プリプロセッサーは単純に妥当な CSS を生成するので、以下で使用されているテクニックは、推奨される場合は純粋な CSS で書くこともできます。</div>

<h3 id="Flexbox_containers" name="Flexbox_containers">フレックスボックスのコンテナー</h3>

<p> {{cssxref("display")}} プロパティに <code>flex</code> の値を使用すると、要素がブロックレベルのコンテナーボックスを生成します。 <code>inline-flex</code> の値では、要素がインラインレベルのフレックスコンテナーボックスを生成します。</p>

<ul>
 <li>値: <code>flex</code> | <code>inline-flex</code></li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-containers">https://drafts.csswg.org/css-flexbox/#flex-containers</a></li>
</ul>

<pre class="brush: css">@mixin flexbox {
  display: -webkit-box;
  display: -moz-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}

//Using this mixin
%flexbox { @include flexbox; }</pre>

<div>
<pre class="brush: css">@mixin inline-flex {
  display: -webkit-inline-box;
  display: -moz-inline-box;
  display: -webkit-inline-flex;
  display: -ms-inline-flexbox;
  display: inline-flex;
}

%inline-flex { @include inline-flex; }</pre>
</div>

<h3 id="Flexbox_direction" name="Flexbox_direction">フレックスボックスの方向</h3>

<p>The {{cssxref("flex-direction")}} property specifies how flex items are placed in the flex container, by setting the direction of the flex container's main axis. This determines the direction in which flex items are laid out in.</p>

<ul>
 <li>値: <code>row</code> (default) | <code>row-reverse</code> | <code>column</code> | <code>column-reverse</code></li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-direction-property">https://drafts.csswg.org/css-flexbox/#flex-direction-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-direction($value: row) {
  @if $value == row-reverse {
    -webkit-box-direction: reverse;
    -webkit-box-orient: horizontal;
    -moz-box-direction: reverse;
    -moz-box-orient: horizontal;
  } @else if $value == column {
    -webkit-box-direction: normal;
    -webkit-box-orient: vertical;
    -moz-box-direction: normal;
    -moz-box-orient: vertical;
  } @else if $value == column-reverse {
    -webkit-box-direction: reverse;
    -webkit-box-orient: vertical;
    -moz-box-direction: reverse;
    -moz-box-orient: vertical;
  } @else {
    -webkit-box-direction: normal;
    -webkit-box-orient: horizontal;
    -moz-box-direction: normal;
    -moz-box-orient: horizontal;
  }
  -webkit-flex-direction: $value;
  -ms-flex-direction: $value;
  flex-direction: $value;
}

// Shorter version:
@mixin flex-dir($args...) { @include flex-direction($args...); }</pre>
</div>

<h3 id="Flexbox_wrap" name="Flexbox_wrap">フレックスボックスの折り返し</h3>

<p>The {{cssxref("flex-wrap")}} property controls whether the flex container is single-lined or multi-lined and the direction of the cross-axis, which determines the direction in which the new lines are stacked in.</p>

<ul>
 <li>値: <code>nowrap</code> (default) | <code>wrap</code> | <code>wrap-reverse</code></li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-wrap-property">https://drafts.csswg.org/css-flexbox/#flex-wrap-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-wrap($value: nowrap) {
  // No Webkit/FF Box fallback.
  -webkit-flex-wrap: $value;
  @if $value == nowrap {
    -ms-flex-wrap: none;
  } @else {
    -ms-flex-wrap: $value;
  }
  flex-wrap: $value;
}</pre>
</div>

<h3 id="Flexbox_flow_(shorthand)" name="Flexbox_flow_(shorthand)">フレックスボックスのフロー (一括指定)</h3>

<p>The {{cssxref("flex-flow")}} property is shorthand for setting the <code>flex-direction</code> and <code>flex-wrap</code> properties, which together define the flex container's main and cross axes.</p>

<ul>
 <li>値: <code>row</code> (default) | <code>nowrap</code></li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-flow-property">https://drafts.csswg.org/css-flexbox/#flex-flow-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-flow($values: (row nowrap)) {
  // No Webkit/FF Box fallback.
  -webkit-flex-flow: $values;
  -ms-flex-flow: $values;
  flex-flow: $values;
}</pre>
</div>

<h3 id="Flexbox_order" name="Flexbox_order">フレックスボックスの順序</h3>

<p>The {{cssxref("order")}} property controls the order in which flex items appear within their flex container, by assigning them to ordinal groups.</p>

<ul>
 <li>Value: any integer (0 is the default)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#order-property">https://drafts.csswg.org/css-flexbox/#order-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin order($int: 0) {
  -webkit-box-ordinal-group: $int + 1;
  -moz-box-ordinal-group: $int + 1;
  -webkit-order: $int;
  -ms-flex-order: $int;
  order: $int;
}</pre>
</div>

<h3 id="Flexbox_grow" name="Flexbox_grow">フレックスボックスの伸長</h3>

<p>The {{cssxref("flex-grow")}} property sets the flex grow factor. Negative numbers are invalid.</p>

<ul>
 <li>Value: any integer (0 is the default)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-grow-property">https://drafts.csswg.org/css-flexbox/#flex-grow-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-grow($int: 1) {
  -webkit-box-flex: $int;
  -moz-box-flex: $int;
  -webkit-flex-grow: $int;
  -ms-flex: $int;
  flex-grow: $int;
}</pre>
</div>

<h3 id="Flexbox_shrink" name="Flexbox_shrink">フレックスボックスの縮小</h3>

<p>The {{cssxref("flex-shrink")}} property sets the flex shrink factor. Negative numbers are invalid.</p>

<ul>
 <li>Value: any integer (0 is the default)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-shrink-property">https://drafts.csswg.org/css-flexbox/#flex-shrink-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-shrink($int: 0) {
  -webkit-flex-shrink: $int;
  -moz-flex-shrink: $int;
  -ms-flex: $int;
  flex-shrink: $int;
}</pre>
</div>

<h3 id="Flexbox_basis" name="Flexbox_basis">フレックスボックスの basis</h3>

<p>The {{cssxref("flex-basis")}} property sets the flex basis. Negative lengths are invalid.</p>

<ul>
 <li>値: See the {{cssxref("flex-basis")}} reference (the default is<code> auto</code>)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-basis-property">https://drafts.csswg.org/css-flexbox/#flex-basis-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex-basis($value: auto) {
  -webkit-flex-basis: $value;
  flex-basis: $value;
}</pre>
</div>

<h3 id="Flexbox_flex_(shorthand)" name="Flexbox_flex_(shorthand)">フレックスボックスの "flex" (一括指定)</h3>

<p>The {{cssxref("flex")}} property specifies the components of a flexible length; <code>flex-grow</code> factor, <code>flex-shrink</code> factor, and the <code>flex-basis</code>. When an element is a flex item, <code>flex</code> is consulted instead of the main size property to determine the main size of the element. If an element is not a flex item, <code>flex</code> has no effect.</p>

<ul>
 <li>値: See the {{cssxref("flex")}} reference for values and default</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#flex-property">https://drafts.csswg.org/css-flexbox/#flex-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin flex($fg: 1, $fs: 0, $fb: auto) {

  // Set a variable to be used by box-flex properties
  $fg-boxflex: $fg;

  // Box-Flex only supports a flex-grow value so lets grab the
  // first item in the list and just return that.
  @if type-of($fg) == 'list' {
    $fg-boxflex: nth($fg, 1);
  }

  -webkit-box: $fg-boxflex;
  -moz-box: $fg-boxflex;
  -webkit-flex: $fg $fs $fb;
  -ms-flexbox: $fg $fs $fb;
  flex: $fg $fs $fb;
}</pre>
</div>

<h3 id="Flexbox_justify_content" name="Flexbox_justify_content">フレックスボックスのコンテンツの位置揃え</h3>

<p>The {{cssxref("justify-content")}} property aligns flex items along the main axis of the current line of the flex container. This is done after any flexible lengths and any auto margins have been resolved. Typically, it helps to distribute extra free space leftover when either all the flex items on a line are inflexible, or are flexible but have reached their maximum size. It also exerts some control over the alignment of items when they overflow the line.</p>

<div class="note">
<p><strong>Note</strong>: <code>space-*</code> values not supported in older syntaxes.</p>
</div>

<ul>
 <li>値: <code>flex-start</code> (default) | <code>flex-end</code> | <code>center</code> | <code>space-between</code> | <code>space-around</code></li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#justify-content-property">https://drafts.csswg.org/css-flexbox/#justify-content-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin justify-content($value: flex-start) {
  @if $value == flex-start {
    -webkit-box-pack: start;
    -moz-box-pack: start;
    -ms-flex-pack: start;
  } @else if $value == flex-end {
    -webkit-box-pack: end;
    -moz-box-pack: end;
    -ms-flex-pack: end;
  } @else if $value == space-between {
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: justify;
  } @else if $value == space-around {
    -ms-flex-pack: distribute;
  } @else {
    -webkit-box-pack: $value;
    -moz-box-pack: $value;
    -ms-flex-pack: $value;
  }
  -webkit-justify-content: $value;
  justify-content: $value;
}
  // Shorter version:
  @mixin flex-just($args...) { @include justify-content($args...); }</pre>
</div>

<h3 id="Flexbox_align_items" name="Flexbox_align_items">フレックスボックスの項目の配置</h3>

<p>Flex items can be aligned in the cross axis of the current line of the flex container, similar to <code>justify-content</code> but in the perpendicular direction. {{cssxref("align-items")}} sets the default alignment for all of the flex container's items, including anonymous flex items. {{cssxref("align-self")}} allows this default alignment to be overridden for individual flex items. (For anonymous flex items, <code>align-self</code> always matches the value of <code>align-items</code> on their associated flex container.)</p>

<ul>
 <li>値: <code>flex-start</code> | <code>flex-end</code> | <code>center</code> | <code>baseline</code> | <code>stretch</code> (default)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#align-items-property">https://drafts.csswg.org/css-flexbox/#align-items-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin align-items($value: stretch) {
  @if $value == flex-start {
    -webkit-box-align: start;
    -moz-box-align: start;
    -ms-flex-align: start;
  } @else if $value == flex-end {
    -webkit-box-align: end;
    -moz-box-align: end;
    -ms-flex-align: end;
  } @else {
    -webkit-box-align: $value;
    -moz-box-align: $value;
    -ms-flex-align: $value;
  }
  -webkit-align-items: $value;
  align-items: $value;
}</pre>
</div>

<h3 id="Flexbox_align_self" name="Flexbox_align_self">フレックスボックスの自己配置</h3>

<p>Values: <code>auto</code> (default) | <code>flex-start</code> | <code>flex-end</code> | <code>center</code> | <code>baseline</code> | <code>stretch</code></p>

<p>Spec: <a href="https://drafts.csswg.org/css-flexbox/#align-items-property">https://drafts.csswg.org/css-flexbox/#align-items-property</a></p>

<div>
<pre class="brush: css">@mixin align-self($value: auto) {
  // No Webkit Box Fallback.
  -webkit-align-self: $value;
  @if $value == flex-start {
    -ms-flex-item-align: start;
  } @else if $value == flex-end {
    -ms-flex-item-align: end;
  } @else {
    -ms-flex-item-align: $value;
  }
  align-self: $value;
}</pre>
</div>

<h3 id="Flexbox_align_content" name="Flexbox_align_content">フレックスボックスのコンテンツの配置</h3>

<p>The {{cssxref("align-content")}} property aligns a flex container's lines within the flex container when there is extra space in the cross-axis, similar to how <code>justify-content</code> aligns individual items within the main axis. Note that this property has no effect when the flexbox has only a single line.</p>

<ul>
 <li>値: <code>flex-start</code> | <code>flex-end</code> | <code>center</code> | <code>space-between</code> | <code>space-around</code> | <code>stretch</code> (default)</li>
 <li>Spec: <a href="https://drafts.csswg.org/css-flexbox/#align-content-property">https://drafts.csswg.org/css-flexbox/#align-content-property</a></li>
</ul>

<div>
<pre class="brush: css">@mixin align-content($value: stretch) {
  // No Webkit Box Fallback.
  -webkit-align-content: $value;
  @if $value == flex-start {
    -ms-flex-line-pack: start;
  } @else if $value == flex-end {
    -ms-flex-line-pack: end;
  } @else {
    -ms-flex-line-pack: $value;
  }
  align-content: $value;
}</pre>
</div>