質問編集履歴
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コードが別のページになっていたので図のコードに修正を行いました
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縮小した時に文字を中央固定・下側の空白を無く
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縮小した時にサイドバーの文字を中央固定・下側の空白を無くしたい
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現在HTML5・JQUERY・bootstrapを活用して本の貸し出しシステムを作っています。
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・縮小した時に図２の下側の空白をけしたい
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．縮小した時にサイドバーの文字を黒色の部分の真ん中に配置したい
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上記の二点をbootstrapを用いて解決したいです
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図１
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```
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通常画面（図１：縮尺100%）の場合は想定通りの表示になりますが
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縮尺を小さくすると
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問題点１・左側のAll等の配置が左に寄ってしまう（中央に配置したい）
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<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
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<link href="https://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/css/toastr.min.css" rel="stylesheet" />
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<script src="https://cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/js/toastr.min.js"></script>
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<title>Document</title>
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</head>
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<body>
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<body style="margin-bottom:-100px" >
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<div class="container-fluid" style="background-color: #eeeeee">
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<div class="container-fluid h-100" style="background-color: #eeeeee">
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<div class="row">
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<div class="row h-100 ">
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<!--サイドメニュー-->
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<div class="col-sm-2" style="background-color:#4d4d4d;">
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<div class="position-fixed" style="margin-left:
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<div class="position-fixed " style="margin-left: 35px;">
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<a href="#" class="text-center" style="margin-bottom:30px; margin-top: 70px; display:block; color:white; font-size: 30px; width: auto;">All</a>
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<a href="#" class="text-center" style="margin-bottom:30px; margin-top: 70px; display:block; color:white; font-size: 30px; width: auto;" id="All">All</a>
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<br>
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<br>
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<a href="file:///C:/Users/ogawa/Desktop/portbook/
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<a href="file:///C:/Users/ogawa/Desktop/portbook/index.html"><button class="btn-outline-info" style="margin-top:150px; display:block; font-size: 30px; width: auto;">RETURN</button></a>
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</div>
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<div class="col-sm-10">
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<
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<
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<div class="
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<
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<
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<
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<div class="text-center strong" style="margin-top: 80px; margin-bottom: 58px;" id="warning">＜入力項目＞</div>
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<form class="text-center">
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<div class="form-group row">
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<label for="isbn" class="col-sm-3 col-form-label">ISBN</label>
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<div class="input-group col-sm-6" style="margin-bottom: 30px;">
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<input type="text" class="form-control" id="isbn" placeholder="12345678910">
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<button class="btn btn-default btn-primary" type="submit" id="getBookInfo">Search</button>
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</div>
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</div>
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<div class="form-group row">
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<label for="title" class="col-sm-3 col-form-label">タイトル</label>
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<div class="col-sm-6" style="margin-bottom: 30px;">
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<input type="text" class="form-control" id="title" placeholder="本の借り方" value="">
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</div>
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</div>
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<div class="form-group row">
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<label for="author" class="col-sm-3 col-form-label">著者</label>
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<div class="col-sm-6" style="margin-bottom: 30px;">
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<input type="text" class="form-control" id="author"placeholder="本借男" value="">
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</div>
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</div>
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<div class="form-group row">
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<label for="genre" class="col-sm-3 col-form-label">ジャンル</label>
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<div class="col-sm-6" style="margin-bottom: 30px;">
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<select type="text" class="form-control" id="genre" placeholder="文芸,実用,ビジネス・経済・経営,児童書・学参,専門書,その他" value="">
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<option value="1">文芸</option>
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<option value="2" selected="selected">実用</option>
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<option value="3">ビジネス・経済・経営</option>
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<option value="4">児童書・学参</option>
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<option value="5">専門書</option>
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<option value="6">その他</option>
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</select>
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</div>
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</div>
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<div class="form-group row">
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<label for="publisher" class="col-sm-3 col-form-label">出版社</label>
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<div class="col-sm-6" style="margin-bottom: 30px;">
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<input type="text" class="form-control" id="publisher" placeholder="集英社" value="">
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</div>
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</div>
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<div class="form-group row">
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<label for="image-url" class="col-sm-3 col-form-label">画像URL</label>
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<div class="col-sm-6" style="margin-bottom: 20px;">
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<input type="text" class="form-control" id="image-url" placeholder="https://search.yahoo.co.jp/image/search?ei=UTF-8&p=%E6%96%87%E9%83%A8%E7%A7%91%E5%AD%A6%E7%9C%81&fr=mcafeess1" value="">
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<!-- todo:画像を表示 -->
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<div src="" id= "thumbnail" class="mx-auto" style="margin-top: 50px; width: 240px; height: 310px;"></div>
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<img src="no_image.jpg" style="margin-top: -300px; width: 240px; height: 310px;" id="no-image"/>
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<!-- /todo:画像を表示 -->
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</div>
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</div>
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<div class="form-group row">
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<label for="description" class="col-sm-3 col-form-label">書籍の説明</label>
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<div class="col-sm-6" style="margin-bottom: 30px;">
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<textarea class="form-control" id="description" rows="4" value=""></textarea>
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</div>
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</div>
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<div class="text-center">
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<button type="submit" class="btn btn-primary " style="margin-bottom: 50px;">書籍を追加</button>
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</div>
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</form>
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<!--/メインコンテンツ-->
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</div>
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<!--/検索バー-->
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<nav aria-label="...">
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<div class="mx-auto" style="width: 200px; padding-top: 20px;">
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<ul class="pagination">
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<li class="page-item">
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<a class="page-link" href="#" aria-label="前">
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<span aria-hidden="true">«</span>
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</a>
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</li>
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<li class="page-item"><a class="page-link" href="#">1</a></li>
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<li class="page-item"><a class="page-link" href="#">2</a></li>
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<li class="page-item"><a class="page-link" href="#">3</a></li>
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<li class="page-item"><a class="page-link" href="#">4</a></li>
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<li class="page-item"><a class="page-link" href="#">5</a></li>
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<li class="page-item">
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<a class="page-link" href="#" aria-label="次">
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<span aria-hidden="true">»</span>
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</a>
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</li>
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</ul>
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</div>
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</nav>
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<!--送りページ上に書く-->
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<div class="row">
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-danger text-dark" style="width: 240px; margin-bottom: 15Px;">return</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-danger text-dark" style="width: 240px; margin-bottom: 15Px">return</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<br>
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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<br>
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
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</div>
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<div class="text-center" style="width: 50%;">
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<img src="no_image.jpg" style="width: 240px; height: 310px;">
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|
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<br>
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240
|
-
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241
|
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<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
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242
|
-
|
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243
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-
</div>
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244
|
-
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245
|
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<div class="text-center" style="width: 50%;">
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246
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-
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-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
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248
|
-
|
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249
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-
<br>
|
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250
|
-
|
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251
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
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252
|
-
|
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253
|
-
</div>
|
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254
|
-
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255
|
-
<div class="text-center" style="width: 50%;">
|
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256
|
-
|
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257
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
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258
|
-
|
|
259
|
-
<br>
|
|
260
|
-
|
|
261
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
262
|
-
|
|
263
|
-
</div>
|
|
264
|
-
|
|
265
|
-
<div class="text-center" style="width: 50%;">
|
|
266
|
-
|
|
267
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
268
|
-
|
|
269
|
-
<br>
|
|
270
|
-
|
|
271
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
272
|
-
|
|
273
|
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</div>
|
|
274
|
-
|
|
275
|
-
<div class="text-center" style="width: 50%;">
|
|
276
|
-
|
|
277
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
278
|
-
|
|
279
|
-
<br>
|
|
280
|
-
|
|
281
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
282
|
-
|
|
283
|
-
</div>
|
|
284
|
-
|
|
285
|
-
<div class="text-center" style="width: 50%;">
|
|
286
|
-
|
|
287
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
288
|
-
|
|
289
|
-
<br>
|
|
290
|
-
|
|
291
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
292
|
-
|
|
293
|
-
</div>
|
|
294
|
-
|
|
295
|
-
<div class="text-center" style="width: 50%;">
|
|
296
|
-
|
|
297
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
298
|
-
|
|
299
|
-
<br>
|
|
300
|
-
|
|
301
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
302
|
-
|
|
303
|
-
</div>
|
|
304
|
-
|
|
305
|
-
<div class="text-center" style="width: 50%;">
|
|
306
|
-
|
|
307
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
308
|
-
|
|
309
|
-
<br>
|
|
310
|
-
|
|
311
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
312
|
-
|
|
313
|
-
</div>
|
|
314
|
-
|
|
315
|
-
<div class="text-center" style="width: 50%;">
|
|
316
|
-
|
|
317
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
318
|
-
|
|
319
|
-
<br>
|
|
320
|
-
|
|
321
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
322
|
-
|
|
323
|
-
</div>
|
|
324
|
-
|
|
325
|
-
<div class="text-center" style="width: 50%;">
|
|
326
|
-
|
|
327
|
-
<img src="no_image.jpg" style="width: 240px; height: 310px;">
|
|
328
|
-
|
|
329
|
-
<br>
|
|
330
|
-
|
|
331
|
-
<button type="button" class="btn btn-primary text-dark" style="width: 240px; margin-bottom: 15Px">rental</button>
|
|
332
|
-
|
|
333
|
-
</div>
|
|
334
|
-
|
|
335
|
-
</div>
|
|
336
|
-
|
|
337
|
-
<!--送りページ下に書く-->
|
|
338
|
-
|
|
339
|
-
<nav aria-label="...">
|
|
340
|
-
|
|
341
|
-
<div class="mx-auto" style="width: 200px;">
|
|
342
|
-
|
|
343
|
-
<ul class="pagination">
|
|
344
|
-
|
|
345
|
-
<li class="page-item">
|
|
346
|
-
|
|
347
|
-
<a class="page-link" href="#" aria-label="前">
|
|
348
|
-
|
|
349
|
-
<span aria-hidden="true">«</span>
|
|
350
|
-
|
|
351
|
-
</a>
|
|
352
|
-
|
|
353
|
-
</li>
|
|
354
|
-
|
|
355
|
-
<li class="page-item"><a class="page-link" href="#">1</a></li>
|
|
356
|
-
|
|
357
|
-
<li class="page-item"><a class="page-link" href="#">2</a></li>
|
|
358
|
-
|
|
359
|
-
<li class="page-item"><a class="page-link" href="#">3</a></li>
|
|
360
|
-
|
|
361
|
-
<li class="page-item"><a class="page-link" href="#">4</a></li>
|
|
362
|
-
|
|
363
|
-
<li class="page-item"><a class="page-link" href="#">5</a></li>
|
|
364
|
-
|
|
365
|
-
<li class="page-item">
|
|
366
|
-
|
|
367
|
-
<a class="page-link" href="#" aria-label="次">
|
|
368
|
-
|
|
369
|
-
<span aria-hidden="true">»</span>
|
|
370
|
-
|
|
371
|
-
</a>
|
|
372
|
-
|
|
373
|
-
</li>
|
|
374
|
-
|
|
375
|
-
</ul>
|
|
376
|
-
|
|
377
|
-
</div>
|
|
378
|
-
|
|
379
|
-
</nav>
|
|
380
|
-
|
|
381
|
-
</div>
|
|
382
|
-
|
|
383
|
-
<!--/メインコンテンツ-->
|
|
384
|
-
|
|
385
225
|
</div>
|
|
386
226
|
|
|
387
227
|
</div>
|
|
388
228
|
|
|
229
|
+
|
|
230
|
+
|
|
389
231
|
</body>
|
|
390
232
|
|
|
391
|
-
</html>
|
|
233
|
+
</html>
|
|
392
234
|
|
|
393
235
|
```
|
|
394
236
|
|
|
@@ -402,6 +244,4 @@
|
|
|
402
244
|
|
|
403
245
|
### 補足情報（FW/ツールのバージョンなど）
|
|
404
246
|
|
|
405
|
-
|
|
406
|
-
|
|
407
|
-
|
|
247
|
+
bootstrapは最新バージョンで行っています。
|