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URLSearchParams

The URLSearchParams interface defines utility methods to work with the query string of a URL.

An object implementing URLSearchParams can directly be used in a for...of structure, instead of entries(): for (var p of mySearchParams) is equivalent to for (var p of mySearchParams.entries()).

Constructor

URLSearchParams(): Constructor returning a URLSearchParams object.

Properties

This interface doesn't inherit any properties.

Methods

This interface doesn't inherit any methods.

URLSearchParams.append(): Appends a specified key/value pair as a new search parameter.
URLSearchParams.delete(): Deletes the given search parameter, and its associated value, from the list of all search parameters.
URLSearchParams.entries(): Returns an iterator allowing to go through all key/value pairs contained in this object.
URLSearchParams.get(): Returns the first value associated to the given search parameter.
URLSearchParams.getAll(): Returns all the values association with a given search parameter.
URLSearchParams.has(): Returns a Boolean indicating if such a search parameter exists.
URLSearchParams.keys(): Returns an iterator allowing to go through all keys of the key/value pairs contained in this object.
URLSearchParams.set(): Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
URLSearchParams.sort(): Sorts all key/value pairs, if any, by their keys.
URLSearchParams.toString(): Returns a string containing a query string suitable for use in a URL.
URLSearchParams.values(): Returns an iterator allowing to go through all values of the key/value pairs contained in this object.

Example

var paramsString = "q=URLUtils.searchParams&topic=api";
var searchParams = new URLSearchParams(paramsString);

//Iterate the search parameters.
for (let p of searchParams) {
  console.log(p);
}

searchParams.has("topic") === true; // true
searchParams.get("topic") === "api"; // true
searchParams.getAll("topic"); // ["api"]
searchParams.get("foo") === null; // true
searchParams.append("topic", "webdev");
searchParams.toString(); // "q=URLUtils.searchParams&topic=api&topic=webdev"
searchParams.set("topic", "More webdev");
searchParams.toString(); // "q=URLUtils.searchParams&topic=More+webdev"
searchParams.delete("topic");
searchParams.toString(); // "q=URLUtils.searchParams"

Specifications

Specification	Status	Comment
URL The definition of 'URLSearchParams' in that specification.	Living Standard	Initial definition.

Browser compatibility

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	49	29.0 (29.0)^[1]	No support	36	10.1
`entries()`, `keys()`, `values()`, and support of `for...of`	49	44.0 (44.0)	No support	36	?
`USVString` for constructor `init` object	61	53.0 (53.0)	No support	48	?
Record for constructor `init` object	61	54.0 (54.0)	No support	48	?
`sort()`	61	?	No support	48	?

Feature	Android Webview	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	49	49	29.0 (29.0)^[1]	No support	36	No support
`entries()`, `keys()`, `values()`, and support of `for...of`	49	49	44.0 (44.0)	No support	36	No support
`USVString` for constructor `init` object	61	61	53.0 (53.0)	No support	48	?
Record for constructor `init` object	61	61	54.0 (54.0)	No support	48	?
`sort()`	61	61	?	No support	48	No support

[1] Firefox has a bug whereby single quotes contained in URLs are escaped when accessed via URL APIs (bug 1386683). This has been fixed as of Firefox 57.