mutability
v0.3.2
Published
A JavaScript library for transactional mutable updates
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Mutability
A JavaScript library for transactional mutable updates
Motivation
When we want to perform transactional updates on a mutable object, if an error is caught during the update process, the mutable update will not be applied at all. Otherwise, the mutable update will be applied to the mutable object. Therefore, we need a tool to implement this functionality.
Installation
yarn add mutability mutative
Usage
import { mutate } from 'mutability';
test('base - mutate', () => {
const baseState = {
a: {
c: 1,
},
};
mutate(baseState, (draft) => {
draft.a.c = 2;
});
expect(baseState).toEqual({ a: { c: 2 } });
});
test('base - mutate with error', () => {
const baseState = {
a: {
c: 1,
},
b: {
c: 1,
},
};
try {
mutate(baseState, (draft) => {
draft.a.c = 2;
throw new Error('error');
draft.b.c = 2;
});
} catch (e) {
//
}
expect(baseState).toEqual({
a: {
c: 1,
},
b: {
c: 1,
},
});
});
License
Mutability is MIT licensed.