React Search Param State

This library works with react-router-dom to provide a hook that allows you to store and retrieve state in the URL search parameters, allowing users to share links with the state included and to refresh the page without losing the state.

The hook is exported as default, so you can import in one of the following ways:

// ES6
import useSearchParamState from '@ptolemy2002/react-search-param-state';
// CommonJS
const useSearchParamState = require('@ptolemy2002/react-search-param-state');

Type Reference

type SetSearchParamAction<T extends Record<string, any>, K extends keyof T> = MaybeTransformer<T[K], [T[K]]>;
type SetSearchParamFunction<T extends Record<string, any>> = (
    values: MaybeTransformer<
        MaybeTransformerRecord<SetSearchParamAction<T, keyof T>>,
        [TAndOthers<T>]
        >
    ) => void
;

type ConvertFunctions<T extends Record<string, any>> = {
    [K in KeysNotMatchingEqualTypes<T, string | null>]: (value: string | null) => T[K];
};

type UseSearchParamResult<T extends Record<string, any>> = HookResultData<{
    currentValues: TAndOthers<T>;
    set: SetSearchParamFunction<T>;
}, readonly [TAndOthers<T>, SetSearchParamFunction<T>]>;

Note that the HookResult class comes from the @ptolemy2002/react-hook-result library, a peer dependency of this library. The UseSearchParamResult type combines itself with an array ONLY for the purpose of allowing destructuring to work correctly. Do not attempt to access array properties in UseSearchParamResult directly, as they do not actually exist.

Hooks

The following hooks are available in the library:

useSearchParamState<T extends Record<string, any>>

Description

With your specified defaultVaues, retrieve state from the URL parameters, converting values as specified. The hook will return with a funtion that can be used to update the state. T represents the type of the parameters you expect, though know that the result will include all parameters in the URL, even if they are not part of this type.

Parameters

• defaultValues (Partial<T>): An object containing the default values for the state. The keys are the names of the state variables, and the values are the default values. The values can be any type, but they will be converted to strings when stored in the URL.
• converts (ConvertFunctions<T>): An object containing functions to convert the values from strings to the desired type. The keys are the names of the state variables, and the values are functions that take a string and return the desired type. If a key is not present in this object, the value will be used as-is. The type for this requires a convert function to be present for any property that does not have string | null as its value type (EXACTLY) and makes the others optional.

Returns

• HookResult: A hook result containing the following values in this order:
  • currentValues (TAndOthers<T>): An object containing the current state values, including any default values that were not specified in the URL and any values that were specified in the URL, but not in the default values object.
  • setState (SetSearchParamFunction<T>): A function that can be used to update the state. You can specify a callable as either the parameter itself or one of the values, in both cases the current value of the state/variable will be passed as a parameter to the callable. Any variables that do not appear in the object passed to the function will be left unchanged.

Peer Dependencies

These should be installed in order to use the library, as npm does not automatically add peer dependencies to your project.

• react: ^18.3.1
• react-dom: ^18.3.1
• react-router-dom: ^6.26.2
• @ptolemy2002/react-hook-result: ^2.1.1
• @ptolemy2002/js-utils: ^3.0.2

Commands

The following commands exist in the project:

• npm run uninstall - Uninstalls all dependencies for the library
• npm run reinstall - Uninstalls and then Reinstalls all dependencies for the library
• npm run example-uninstall - Uninstalls all dependencies for the example app
• npm run example-install - Installs all dependencies for the example app
• npm run example-reinstall - Uninstalls and then Reinstalls all dependencies for the example app
• npm run example-start - Starts the example app after building the library
• npm run build - Builds the library
• npm run release - Publishes the library to npm without changing the version
• npm run release-patch - Publishes the library to npm with a patch version bump
• npm run release-minor - Publishes the library to npm with a minor version bump
• npm run release-major - Publishes the library to npm with a major version bump