34 lines
771 B
TypeScript
34 lines
771 B
TypeScript
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/**
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* External dependencies
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*/
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import { klona } from 'klona/json';
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/**
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* Utility for updating state and only cloning objects in the path that changed.
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*/
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export default function updateState< Type extends Record< string, unknown > >(
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// The state being updated
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state: Type,
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// The path being updated
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path: Array< keyof Type >,
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// The value to update for the path
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value: unknown
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): Type {
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const newState = klona( state ) as Type;
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let current: Record< string, unknown > = newState;
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for ( let i = 0; i < path.length; i++ ) {
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const key = path[ i ] as string;
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if ( i === path.length - 1 ) {
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current[ key ] = value;
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} else {
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current[ key ] = current[ key ] || {};
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}
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current = current[ key ] as Record< string, unknown >;
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}
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return newState;
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}
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