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AddEventListener
addEventListener() is a common BrightSign method that is used to listen for an event.
Syntax:
| Code Block | ||
|---|---|---|
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target.addEventListener(type, listener); |
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typestring
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:
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Specifies the type of event to listen for
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listenerfunction
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: The object to be notified when the event (of the specified
type) happens
RemoveEventListener
removeEventListener()is a common BrightSign method that is
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used to remove an event listener.
Syntax:
| Code Block | ||
|---|---|---|
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target.removeEventListener(type, listener); |
...
typestring
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: Specifies the type of event to listen for
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listenerfunction
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Reserved Methods:
The following methods are reserved for BrightSign use only:
checkPassword()
getDigestHash()
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: The object to be notified when the event (of the specified
type) happens
Example
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|---|---|---|
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function GPIOcontrolDown(msg){
console.log(JSON.stringify(msg));
console.log(" GPIO : " + msg.detail)
}
// to add an event listener for the "controldown" GPIO event
control_port.addEventListener("controldown", GPIOcontrolDown);
// to remove the "controldown" GPIO event listener
control_port.removeEventListener("controldown", GPIOcontrolDown); |