URLSearchParams: size property
Note: This feature is available in Web Workers.
The size
read-only property of the URLSearchParams
interface indicates the total number of search parameter entries.
Value
A number indicating the total number of search parameter entries in the URLSearchParams
object.
Examples
Getting the amount of search parameter entries
You can get the total number of search parameter entries like so:
js
const searchParams = new URLSearchParams("c=4&a=2&b=3&a=1");
searchParams.size; // 4
Note how the a
parameter is given twice, but size
returns the number of all given entries (4) and not 3. To get the amount of unique keys, you can use a Set
, for example:
js
[...new Set(searchParams.keys())].length; // 3
Checking if search parameters exist
The size
property is useful for checking whether there are any search parameters at all:
js
const url = new URL("https://example.com?foo=1&bar=2");
if (url.searchParams.size) {
console.log("URL has search parameters!");
}
Specifications
Specification |
---|
URL Standard # dom-urlsearchparams-size |
Browser compatibility
BCD tables only load in the browser