デフォルト表示
キャプションが入ります。キャプションが入ります。キャプションが入ります。 
これが縦長の画像
<figure class="wp-block-gallery columns-{column} is-cropped">
<ul class="blocks-gallery-grid">
<li class="blocks-gallery-item">
<figure>
<a href="#"><img src="sample.jpg" alt="代替テキスト" data-id="{ID}" data-full-url="sample.jpg" data-link="#" class="wp-image-{ID}"></a>
<figcaption class="blocks-gallery-item__caption">キャプション</figcaption>
</figure>
</li>
〜〜〜くりかえす〜〜〜
</ul>
</figure>ul / li がリストブロックの影響を受けないように調節する必要がある。
ブロック設定パネル
ギャラリーの設定
カラム / 切り抜き / リンク設定
カラムは1〜8まで設定
リンク設定は全画像共通になる
画像切り抜きOFFの場合、幅に合わせて高さがバラバラになる
画像切り抜きONの場合、行ごとに一番高い画像に合わせて幅が狭くなる
キャプションは画像の上に白文字表示
最後の行は、残りの枚数で均等割
サンプル（クロップ無し）
スタイル設定
標準スタイル
.blocks-gallery-grid, .wp-block-gallery {
display: flex;
flex-wrap: wrap;
list-style-type: none;
padding: 0;
margin:0
}
.blocks-gallery-grid .blocks-gallery-image, .blocks-gallery-grid .blocks-gallery-item, .wp-block-gallery .blocks-gallery-image, .wp-block-gallery .blocks-gallery-item {
margin: 0 16px 16px 0;
display: flex;
flex-grow: 1;
flex-direction: column;
justify-content: center;
position:relative
}
.blocks-gallery-grid .blocks-gallery-image figure, .blocks-gallery-grid .blocks-gallery-item figure, .wp-block-gallery .blocks-gallery-image figure, .wp-block-gallery .blocks-gallery-item figure {
margin: 0;
height:100%
}
@supports ((position: -webkit-sticky) or(position: sticky)) {
.blocks-gallery-grid .blocks-gallery-image figure, .blocks-gallery-grid .blocks-gallery-item figure, .wp-block-gallery .blocks-gallery-image figure, .wp-block-gallery .blocks-gallery-item figure {
display: flex;
align-items: flex-end;
justify-content:flex-start
}
}
.blocks-gallery-grid .blocks-gallery-image img, .blocks-gallery-grid .blocks-gallery-item img, .wp-block-gallery .blocks-gallery-image img, .wp-block-gallery .blocks-gallery-item img {
display: block;
max-width: 100%;
height: auto;
width:100%
}
@supports ((position: -webkit-sticky) or(position: sticky)) {
.blocks-gallery-grid .blocks-gallery-image img, .blocks-gallery-grid .blocks-gallery-item img, .wp-block-gallery .blocks-gallery-image img, .wp-block-gallery .blocks-gallery-item img {
width:auto
}
}
.blocks-gallery-grid .blocks-gallery-image figcaption, .blocks-gallery-grid .blocks-gallery-item figcaption, .wp-block-gallery .blocks-gallery-image figcaption, .wp-block-gallery .blocks-gallery-item figcaption {
position: absolute;
bottom: 0;
width: 100%;
max-height: 100%;
overflow: auto;
padding: 40px 10px 9px;
color: #fff;
text-align: center;
font-size: 13px;
background:linear-gradient(0deg, rgba(0, 0, 0, .7), rgba(0, 0, 0, .3) 70%, transparent)
}
.blocks-gallery-grid .blocks-gallery-image figcaption img, .blocks-gallery-grid .blocks-gallery-item figcaption img, .wp-block-gallery .blocks-gallery-image figcaption img, .wp-block-gallery .blocks-gallery-item figcaption img {
display:inline
}
.blocks-gallery-grid.is-cropped .blocks-gallery-image a, .blocks-gallery-grid.is-cropped .blocks-gallery-image img, .blocks-gallery-grid.is-cropped .blocks-gallery-item a, .blocks-gallery-grid.is-cropped .blocks-gallery-item img, .wp-block-gallery.is-cropped .blocks-gallery-image a, .wp-block-gallery.is-cropped .blocks-gallery-image img, .wp-block-gallery.is-cropped .blocks-gallery-item a, .wp-block-gallery.is-cropped .blocks-gallery-item img {
width:100%
}
@supports ((position: -webkit-sticky) or(position: sticky)) {
.blocks-gallery-grid.is-cropped .blocks-gallery-image a, .blocks-gallery-grid.is-cropped .blocks-gallery-image img, .blocks-gallery-grid.is-cropped .blocks-gallery-item a, .blocks-gallery-grid.is-cropped .blocks-gallery-item img, .wp-block-gallery.is-cropped .blocks-gallery-image a, .wp-block-gallery.is-cropped .blocks-gallery-image img, .wp-block-gallery.is-cropped .blocks-gallery-item a, .wp-block-gallery.is-cropped .blocks-gallery-item img {
height: 100%;
flex: 1;
-o-object-fit: cover;
object-fit:cover
}
}
.blocks-gallery-grid .blocks-gallery-image, .blocks-gallery-grid .blocks-gallery-item, .wp-block-gallery .blocks-gallery-image, .wp-block-gallery .blocks-gallery-item {
width:calc((100% - 16px)/2)
}
.blocks-gallery-grid .blocks-gallery-image:nth-of-type(2n), .blocks-gallery-grid .blocks-gallery-item:nth-of-type(2n), .wp-block-gallery .blocks-gallery-image:nth-of-type(2n), .wp-block-gallery .blocks-gallery-item:nth-of-type(2n) {
margin-right:0
}
.blocks-gallery-grid.columns-1 .blocks-gallery-image, .blocks-gallery-grid.columns-1 .blocks-gallery-item, .wp-block-gallery.columns-1 .blocks-gallery-image, .wp-block-gallery.columns-1 .blocks-gallery-item {
width: 100%;
margin-right:0
}
@media (min-width: 600px) {
.blocks-gallery-grid.columns-3 .blocks-gallery-image, .blocks-gallery-grid.columns-3 .blocks-gallery-item, .wp-block-gallery.columns-3 .blocks-gallery-image, .wp-block-gallery.columns-3 .blocks-gallery-item {
width: calc((100% - 32px) /3);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-3 .blocks-gallery-image, .blocks-gallery-grid.columns-3 .blocks-gallery-item, .wp-block-gallery.columns-3 .blocks-gallery-image, .wp-block-gallery.columns-3 .blocks-gallery-item {
width:calc((100% - 32px)/3 - 1px)
}
}
.blocks-gallery-grid.columns-4 .blocks-gallery-image, .blocks-gallery-grid.columns-4 .blocks-gallery-item, .wp-block-gallery.columns-4 .blocks-gallery-image, .wp-block-gallery.columns-4 .blocks-gallery-item {
width: calc((100% - 48px) /4);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-4 .blocks-gallery-image, .blocks-gallery-grid.columns-4 .blocks-gallery-item, .wp-block-gallery.columns-4 .blocks-gallery-image, .wp-block-gallery.columns-4 .blocks-gallery-item {
width:calc((100% - 48px)/4 - 1px)
}
}
.blocks-gallery-grid.columns-5 .blocks-gallery-image, .blocks-gallery-grid.columns-5 .blocks-gallery-item, .wp-block-gallery.columns-5 .blocks-gallery-image, .wp-block-gallery.columns-5 .blocks-gallery-item {
width: calc((100% - 64px) /5);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-5 .blocks-gallery-image, .blocks-gallery-grid.columns-5 .blocks-gallery-item, .wp-block-gallery.columns-5 .blocks-gallery-image, .wp-block-gallery.columns-5 .blocks-gallery-item {
width:calc((100% - 64px)/5 - 1px)
}
}
.blocks-gallery-grid.columns-6 .blocks-gallery-image, .blocks-gallery-grid.columns-6 .blocks-gallery-item, .wp-block-gallery.columns-6 .blocks-gallery-image, .wp-block-gallery.columns-6 .blocks-gallery-item {
width: calc((100% - 80px) /6);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-6 .blocks-gallery-image, .blocks-gallery-grid.columns-6 .blocks-gallery-item, .wp-block-gallery.columns-6 .blocks-gallery-image, .wp-block-gallery.columns-6 .blocks-gallery-item {
width:calc((100% - 80px)/6 - 1px)
}
}
.blocks-gallery-grid.columns-7 .blocks-gallery-image, .blocks-gallery-grid.columns-7 .blocks-gallery-item, .wp-block-gallery.columns-7 .blocks-gallery-image, .wp-block-gallery.columns-7 .blocks-gallery-item {
width: calc((100% - 96px) /7);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-7 .blocks-gallery-image, .blocks-gallery-grid.columns-7 .blocks-gallery-item, .wp-block-gallery.columns-7 .blocks-gallery-image, .wp-block-gallery.columns-7 .blocks-gallery-item {
width:calc((100% - 96px)/7 - 1px)
}
}
.blocks-gallery-grid.columns-8 .blocks-gallery-image, .blocks-gallery-grid.columns-8 .blocks-gallery-item, .wp-block-gallery.columns-8 .blocks-gallery-image, .wp-block-gallery.columns-8 .blocks-gallery-item {
width: calc((100% - 112px) /8);
margin-right:16px
}
@supports (-ms-ime-align: auto) {
.blocks-gallery-grid.columns-8 .blocks-gallery-image, .blocks-gallery-grid.columns-8 .blocks-gallery-item, .wp-block-gallery.columns-8 .blocks-gallery-image, .wp-block-gallery.columns-8 .blocks-gallery-item {
width:calc((100% - 112px)/8 - 1px)
}
}
.blocks-gallery-grid.columns-1 .blocks-gallery-image:nth-of-type(1n), .blocks-gallery-grid.columns-1 .blocks-gallery-item:nth-of-type(1n), .wp-block-gallery.columns-1 .blocks-gallery-image:nth-of-type(1n), .wp-block-gallery.columns-1 .blocks-gallery-item:nth-of-type(1n) {
margin-right:0
}
.blocks-gallery-grid.columns-2 .blocks-gallery-image:nth-of-type(2n), .blocks-gallery-grid.columns-2 .blocks-gallery-item:nth-of-type(2n), .wp-block-gallery.columns-2 .blocks-gallery-image:nth-of-type(2n), .wp-block-gallery.columns-2 .blocks-gallery-item:nth-of-type(2n) {
margin-right:0
}
.blocks-gallery-grid.columns-3 .blocks-gallery-image:nth-of-type(3n), .blocks-gallery-grid.columns-3 .blocks-gallery-item:nth-of-type(3n), .wp-block-gallery.columns-3 .blocks-gallery-image:nth-of-type(3n), .wp-block-gallery.columns-3 .blocks-gallery-item:nth-of-type(3n) {
margin-right:0
}
.blocks-gallery-grid.columns-4 .blocks-gallery-image:nth-of-type(4n), .blocks-gallery-grid.columns-4 .blocks-gallery-item:nth-of-type(4n), .wp-block-gallery.columns-4 .blocks-gallery-image:nth-of-type(4n), .wp-block-gallery.columns-4 .blocks-gallery-item:nth-of-type(4n) {
margin-right:0
}
.blocks-gallery-grid.columns-5 .blocks-gallery-image:nth-of-type(5n), .blocks-gallery-grid.columns-5 .blocks-gallery-item:nth-of-type(5n), .wp-block-gallery.columns-5 .blocks-gallery-image:nth-of-type(5n), .wp-block-gallery.columns-5 .blocks-gallery-item:nth-of-type(5n) {
margin-right:0
}
.blocks-gallery-grid.columns-6 .blocks-gallery-image:nth-of-type(6n), .blocks-gallery-grid.columns-6 .blocks-gallery-item:nth-of-type(6n), .wp-block-gallery.columns-6 .blocks-gallery-image:nth-of-type(6n), .wp-block-gallery.columns-6 .blocks-gallery-item:nth-of-type(6n) {
margin-right:0
}
.blocks-gallery-grid.columns-7 .blocks-gallery-image:nth-of-type(7n), .blocks-gallery-grid.columns-7 .blocks-gallery-item:nth-of-type(7n), .wp-block-gallery.columns-7 .blocks-gallery-image:nth-of-type(7n), .wp-block-gallery.columns-7 .blocks-gallery-item:nth-of-type(7n) {
margin-right:0
}
.blocks-gallery-grid.columns-8 .blocks-gallery-image:nth-of-type(8n), .blocks-gallery-grid.columns-8 .blocks-gallery-item:nth-of-type(8n), .wp-block-gallery.columns-8 .blocks-gallery-image:nth-of-type(8n), .wp-block-gallery.columns-8 .blocks-gallery-item:nth-of-type(8n) {
margin-right:0
}
}
.blocks-gallery-grid .blocks-gallery-image:last-child, .blocks-gallery-grid .blocks-gallery-item:last-child, .wp-block-gallery .blocks-gallery-image:last-child, .wp-block-gallery .blocks-gallery-item:last-child {
margin-right:0
}
.blocks-gallery-grid.alignleft, .blocks-gallery-grid.alignright, .wp-block-gallery.alignleft, .wp-block-gallery.alignright {
max-width: 305px;
width:100%
}
.blocks-gallery-grid.aligncenter .blocks-gallery-item figure, .wp-block-gallery.aligncenter .blocks-gallery-item figure {
justify-content:center
}figcaptionは、
padding: 40px 10px 9px;
背景は薄い黒グラデーション
文字は白色
ブロック制御コメント
<!-- wp:gallery {"ids":[227,223,228,232,230,229,233,234]} -->
<!-- /wp:gallery -->
<!-- wp:gallery {"ids":[234,235,231],"imageCrop":false,"linkTo":"attachment"} -->
<!-- /wp:gallery -->
<!-- wp:gallery {"ids":[235,234],"linkTo":"media"} -->
<!-- /wp:gallery -->