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diff --git a/node_modules/doiuse/data/features/css3-attr.js b/node_modules/doiuse/data/features/css3-attr.js
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+/**
+ * CSS3 attr() function for all properties
+ * While `attr()` is supported for effectively all browsers for the `content` property, CSS Values and Units Level 5 adds the ability to use `attr()` on **any** CSS property, and to use it for non-string values (e.g. numbers, colors).
+ * @see https://caniuse.com/css3-attr
+ */
+
+/**
+ * @type {import('../features').Feature}
+ */
+export default (rule) => {
+  if (rule.type !== 'decl') return false;
+  if (rule.prop === 'content') {
+    return false;
+  }
+
+  return rule.toString().includes('attr(');
+};