web api instance method
URLSearchParams: append() method
Available in workers
The append() method of the URLSearchParams
interface appends a specified key/value pair as a new search parameter.
As shown in the example below, if the same key is appended multiple times it will appear in the parameter string multiple times for each value.
Syntax
append(name, value)
Parameters
name- : The name of the parameter to append.
value- : The value of the parameter to append.
Return value
None (undefined).
Examples
Adding the same parameter multiple times
const url = new URL("https://example.com?foo=1&bar=2");
const params = new URLSearchParams(url.search);
// Add a second foo parameter.
params.append("foo", 4);
// Query string is now: 'foo=1&bar=2&foo=4'
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.