Help us understand the problem. What is going on with this article?

htmlタグのintegrityは正常に動作するのにjsでcreateElementすると動かない。

More than 1 year has passed since last update.
<link
  rel="stylesheet"
  href="https://use.fontawesome.com/releases/v5.5.0/css/all.css"
  integrity="sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU"
  crossorigin="anonymous"
/>

は動くのに

<script>
  (function() {
    var css = document.createElement('link');
    css.href = 'https://use.fontawesome.com/releases/v5.5.0/css/all.css';
    css.rel = 'stylesheet';
    css.integrity = 'sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU';
    css.crossorigin = 'anonymous';
    document.getElementsByTagName('head')[0].appendChild(css);
  })();
</script>

が動かない。

chromeではconsoleにSubresource Integrity: The resource 'https://use.fontawesome.com/releases/v5.5.0/css/all.css' has an integrity attribute, but the resource requires the request to be CORS enabled to check the integrity, and it is not. The resource has been blocked because the integrity cannot be enforced.というエラーが出る。

原因

x crossorigin
o crossOrigin

https://developer.mozilla.org/en-US/docs/Web/API/HTMLLinkElement

html
<script>
  (function() {
    var css = document.createElement('link');
    css.href = 'https://use.fontawesome.com/releases/v5.5.0/css/all.css';
    css.rel = 'stylesheet';
    css.integrity = 'sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU';
-    css.crossorigin = 'anonymous';
+    css.crossOrigin = 'anonymous';
    document.getElementsByTagName('head')[0].appendChild(css);
  })();
</script>

で動く。

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