files/en-us/web/api/urlpattern/hash/index.md
{{APIRef("URL Pattern API")}} {{AvailableInWorkers}}
The hash read-only property of the {{domxref("URLPattern")}} interface is a string containing the pattern used to match the fragment part of a URL.
This is the normalized value of the hash pattern passed to the constructor, an inherited value from a baseURL passed to the constructor, or the default value ("*"), which matches any hash.
A string.
The below example creates a {{domxref("URLPattern")}} object with books/:id for the hash part and logs the property.
This pattern matches any fragment that starts with books/ and ends with an arbitrary string identifier.
const pattern = new URLPattern("https://example.org#books/:id");
console.log(pattern.hash); // 'books/:id'
console.log(pattern.test("https://example.org#books/123")); // true
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