回答編集履歴
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test
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HTMLの機能にはないのでjsで処理することになります
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# jQueryサンプル
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```javascript
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
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<script>
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$(function(){
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$('a[data-target]').on('click',function(e){
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e.preventDefault();
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var pos=$($(this).data("target")).offset().top;
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$('html,body').animate({scrollTop: pos},0);
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});
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});
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</script>
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<style>
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h2{background-Color:yellow}
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.dummy{height:999px}
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</style>
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<ul>
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<li><a href="#" data-target="h2:eq(0)">1個目のh2</a></li>
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<li><a href="#" data-target="h2:eq(1)">2個目のh2</a></li>
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<li><a href="#" data-target="h2:eq(2)">3個目のh2</a></li>
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</ul>
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<div class="dummy">dummy</div>
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<h2>1個目</h2>
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<div class="dummy">dummy</div>
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<h2>2個目</h2>
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<div class="dummy">dummy</div>
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<h2>3個目</h2>
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<div class="dummy">dummy</div>
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```
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