# BoolSignal `and` `and(other: BoolSignal): BoolSignal` Returns a signal with the value that is the logical conjunction of the values of the given signals. It is `true` every time both input signals are `true` and `false` at all other times. **See Also**: `ReactiveModule.and` `delayBy` `delayBy(timeSpan: {milliseconds: number}): this` Delays a signal. The argument is an object with a "milliseconds" property specifying the delay duration in milliseconds. `eq` `eq(other: BoolSignal): BoolSignal` Returns a Boolean signal that takes the value of `true` every time when the value of the left-hand-side signal is **equal** to the value of the right-hand-side one, and the value of `false` all other time. **See Also**: `ReactiveModule.eq` `ifThenElse` `ifThenElse(thenValue: EventSource, elseValue: EventSource): EventSource ifThenElse(thenValue: ScalarSignal, elseValue: ScalarSignal): ScalarSignal ifThenElse(thenValue: StringSignal, elseValue: StringSignal): StringSignal ifThenElse(thenValue: BoolSignal, elseValue: BoolSignal): BoolSignal` Returns a signal or an `EventSource` which at any point of time takes the value (passes the events in case of `EventSource`) of one or another inputs, depending on the momentary value of the given `BoolSignal`. `monitor` `monitor(): EventSource monitor(config: { fireOnInitialValue: ?boolean}): EventSource` Returns an `EventSource` that emits an event every time the value of the input signal changes. The event contains a JSON object with the old and new values in the format: `{ "oldValue": val, "newValue": val }` **Note**: By default, there is no event fired for the initial value of the signal. If `config.fireOnInitialValue` is set to `true` then an event for initial signal value is also emitted. `oldValue` is unset for this initial event. `ne` `ne(other: BoolSignal): BoolSignal` Returns a Boolean signal that takes the value of `true` every time when the value of the left-hand-side signal is **not equal** to the value of the right-hand-side one, and the value of `false` all other time. **See Also**: `ReactiveModule.ne` `not` `not(): BoolSignal` Returns a signal with the logically negated value of the given signal. **See Also**: `ReactiveModule.not` `onOff` `onOff(): EventSource onOff(config: { fireOnInitialValue: ?boolean}): EventSource` Returns an `EventSource` that emits an event every time the value of the input signal changes to `false`. The event contains a JSON object with the old and new values in the format: `{ "oldValue": val, "newValue": val }` **Note**: By default, there is no event fired for the initial value of the signal if it's `false` straight away. If `config.fireOnInitialValue` is set to `true` then an event for initial signal value is also emitted. `oldValue` is unset for this initial event. `onOn` `onOn(): EventSource onOn(config: { fireOnInitialValue: ?boolean}): EventSource` Returns an `EventSource` that emits an event every time the value of the input signal changes to `true`. The event contains a JSON object with the old and new values in the format: `{ "oldValue": val, "newValue": val }` **Note**: By default, there is no event fired for the initial value of the signal if it's `true` straight away. If `config.fireOnInitialValue` is set to `true` then an event for initial signal value is also emitted. `oldValue` is unset for this initial event. `or` `or(other: BoolSignal): BoolSignal` Returns a signal with the value that is the logical disjunction of the values of the given signals. It is `true` every time at least one of the input signals is `true` and `false` at all other times. **See Also**: `ReactiveModule.or` `pin` `pin(): BoolSignal` Returns a `BoolSignal` containing a constant value which is the value of the specified signal immediately after `pin` is called. `pinLastValue` `pinLastValue(): ConstBoolSignal` Returns a `ConstBoolSignal` containing a constant value which is the last value of the specified signal before `pinLastValue` is called. ConstBoolSignal can be passed to a functions which accept bool. `xor` `xor(other: BoolSignal): BoolSignal` Returns a signal with the value that is the logical exclusive disjunction of the values of the given signals. It is `true` every time exactly one of the input signals is `true` and `false` at all other times. **Note**: It is equivalent to `BoolSignal.ne`. **See Also**: `ReactiveModule.xor` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://sparkar-community.gitbook.io/docs/reactivemodule/boolsignal.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.