• A CSS property that is prefixed with --, like --example-name, and whose value can be used in other declarations using the var() function. Custom properties are scoped to the element(s) they are declared on, and participate in the cascade: The value of a custom property is that from the declaration decided by the cascading algorithm. Custom properties are also known as CSS variables. ← MDN Web Docs ↑ w3.org/TR/css-variables-1

1. Previous term: Custom element
2. Next term: Customer Effort Score
3. Random term: Runtime compilation