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Insecure Resource

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CSS

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JavaScript

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HTML 

              
                <section>
  <div class="area">
    <div class="title">【jQuery】<br>スクロールして、指定した場所から出てきて、指定した場所で消える、実装サンプル</div>
    <p class="_a"><a href="https://125naroom.com/web/4582" target="_blank" class="link">View the note</a></p>
  </div>
  <div class="area" id="start">
    <div class="title">しかくが出てきますよ</div>
  </div>
  <div class="area">
    <div class="title">出てますね</div>
  </div>
  <div class="area" id="end">
    <div class="title">しかくが消えますよ</div>
  </div>
  <div class="area">
    <div class="title">消えてますね</div>
  </div>
</section>

<div class="sikaku_box">しかく</div>
!

CSS 

              
                /*================
.sikaku_box
================*/

.sikaku_box {
	position: fixed;
	right: 0;
	bottom: 0;
  display: flex;
	justify-content: center;
	align-items: center;
	width: 100px;
	height: 100px;
	background: #fff689;
  box-sizing: border-box;
	font-size: 16px;
	font-weight: bold;
  opacity: 0;
	z-index: -1;
	transition: 0.3s;
}
.sikaku_box.fixed {
	opacity: 1;
	z-index: 9;
}

/*================
以下は不要です。
================*/

body {
	font-family: YuGothic, "游ゴシック体", "Yu Gothic", "ヒラギノ角ゴ Pro", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
	font-size: 16px;
	letter-spacing: .025em;
	line-height: 1.8;
	margin: 0;
}
@media screen and (max-width: 1024px) {
	body {
		font-size: 14px;
	}
}
.area {
	height: 1000px;
	background: #ccc;
}
section .area:nth-child(even) {
	background: #fff;
}
.title {
	font-size: 30px;
	font-weight: bold;
}
@media screen and (max-width: 1024px) {
	.title {
		font-size: 18px;
	}
}
p._a {
	font-size: 12px;
	font-weight: bold;
	margin: 30px 0 0;
}
p._a .link {
	display: inline-block;
	color: #607D8B;
	padding-left: 1.3em;
	text-indent: -1.3em;
}
p._a .link:before {
	content: '';
	display: inline-block;
	width: 5px;
	height: 5px;
	border-top: 2px solid #607D8B;
	border-right: 2px solid #607D8B;
	-webkit-transform: rotate(45deg);
	transform: rotate(45deg);
	margin-right: 10px;
}
!

JS 

              
                $(function () {
  $(window).on('load scroll', function () { //スクロールするよ
    var scrollHeight = $(document).height(); //ページ上部からの距離を取得
    var scrollPosition = $(window).height() + $(window).scrollTop(); //Windowの高さを取得+スクロール位置を取得
    var startHeight = $("#start").innerHeight(); //場所指定（ここでは出てくる場所）
    var endHeight = $("#end").innerHeight(); //場所指定（ここでは消える場所）
    if (startHeight <= $(this).scrollTop()) { //スクロール距離が『#start』を超えたら
      $('.sikaku_box').addClass('fixed'); //fixedというclassを追加
      if (scrollHeight - scrollPosition <= endHeight) { //スクロール距離が『#end』を超えたら
        $('.sikaku_box').removeClass('fixed'); //fixedというclassを削除
      } else {
        $('.sikaku_box').addClass('fixed'); //fixedというclassを追加
      }
    } else {
      $('.sikaku_box').removeClass('fixed'); //fixedというclassを削除
    }
  });
});
!
999px

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