gesco

Easy data manipulation to get, emit, set, compute and observe.

Installing

$ npm install gesco

API

gesco.get<T = any>(path: PathLike): T

Get the value stored in the path.

gesco.get('foo.bar');

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gesco.delete(path: PathLike, silently: boolean = false)

Delete the value stored in the path. See silence.

gesco.delete('foo.bar');

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gesco.emit<T = any>(path: PathLike: callback?: EmitCallback<T>)

Bubbles the value changes. See bubbles.

gesco.emit('foo.bar')

gesco.emit('foo', foo => {
    foo.push('bar');
})

Since changing a property directly or using array methods won't bubble, this allows you to indicate to Gesco that there has been a change/transformation. Use callback to perform operations like that.

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gesco.set<T = any>(path: PathLike, value: any, silently: boolean = false): void

Stores a value in the path. See silence.

gesco.set('foo', 'bar');

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gesco.observe<T = any>(from: PathLike, callback: ObserverCallback<T>): void

Observe the path and the descending paths.

gesco.observe('foo.bar', bar => {
    console.log('bar has changed:', bar);
});

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gesco.compute<T = any>(to: PathLike, from: PathLike, callback: ComputerCallback<T>): void

Compute the path and the descending paths.

gesco.compute('newBar', 'foo.bar', bar => bar.toUpperCase());

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gesco.link(from: PathLike, to: PathLike, bidirectional: boolean = false)

Links two different paths.

gesco.link('path1', 'path2');

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Bubbles

This term refers to triggering the direct and indirect observers/computers of a path.

The methods set, delete and emit bubble the value changes automatically when invoked.

Silence

This term refers to prevent bubbling the value changes.

Propagation

When a value is changed, the change propagates to the path itself and its descendants. For example, changing foo will trigger:

• foo
• foo.bar
• foo.bar.quux

License

MIT © Isaac Ferreira [e-mail]