[CSSチュートリアル]スクロールバーを非表示にし、サンプルコードの内容をスクロールすることができますするCSS

.outer-container{
     width: 300px;
     height: 200px;
     border:1px solid black;
     overflow:hidden;
     position:relative;
}
.inner-container{
    position:absolute;
    /* The position of these four directions should be written in full, otherwise it will not take effect */
    top:0;
    left:0;
    bottom:0;
    right:-17px;
    overflow-y: scroll;
}

<div class="outer-container">
    <div class="inner-container">
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    </div>
</div>

.wrapper{
	width: 300px;
	height: 200px;
	overflow:auto;
}
/*chrome and safari*/
.wrapper::-webkit-scrollbar { width: 0 !important }
/*IE 10+*/
.wrapper { -ms-overflow-style: none; }
/*Firefox*/
.wrapper { overflow: -moz-scrollbars-none; }

<div class="wrapper">
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</div>