Class MutCellImpl<T>Internal

Create a cell the value of which is true if this cell's value is not null or undefined, false otherwise.

Create a cell that negates the value of this cell using the ! operator.

Create a cell the value of which is true if this cell's value is null or undefined, false otherwise.

Convert this cell to an immutable cell. The resulting will no longer be an instance of MutCell but will still update its value whenever this cell is updated.

Create a two-way binding that modified values in both directions. The resulting cell is mutable and any modification of it will also result in an update of this cell.

Example

const a = bind(1);
const b = a.bimap(x => x + 1, y => y - 1);

expect(b.value).toBe(2);

a.value = 5;
expect(b.value).toBe(6);

b.value = 3;
expect(a.value).toBe(2);
Copy

Create a cell tthe value of which is true if this cell's value is equal to the given value or the value of the given cell, false otherwise.

Create a cell that applies a function to the value of this cell. The function must return a cell.

Get the cells current value and attach an observer. The observer function is called once with the current value immediately upon calling this method.

The observer is attached before it's called with the current value of the cell.

Create a cell that applies a function to the value of this cell.

The function will be called whenever the value property of the resulting cell is accessed. If the resulting cell is being observed, the function will also be called once each time the value of this cell changes.

Create a cell that applies a function to the value of this cell, but only when the value is not null or undefined.

The function will be called whenever the value property of the resulting cell is accessed. If the resulting cell is being observed, the function will also be called once each time the value of this cell changes.

Create a promise that resolves with the first non-null, non-undefined value of this cell. If the value of this cell is not null or undefined the method returns a resolved Promise with the value.

Create a cell from an existing observable (e.g. an Emitter) and an initial value.

N.B. Unless observed, the value of the resulting cell will not update when the observable emits events.