JavaScriptのdatasetやgetAttributeは数値ではなく文字列を返す

HTML

<div id="foo" data-foo-bar="120"></div>

JavaScript

var res1 = document.getElementById('foo').dataset.fooBar;
var res2 = document.getElementById('foo').getAttribute('data-foo-bar');
document.write(typeof res1);
document.write('<br>');
document.write(typeof res2);

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JavaScriptのdatasetやgetAttributeは数値ではなく文字列を返す

HTML

JavaScript

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console