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AddEventListener
addEventListener() is a common BrightSign method that is
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used to listen for
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an event.
Syntax:
| Code Block | ||
|---|---|---|
| ||
target.addEventListener(type, listener |
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); |
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typestring
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: Specifies the type of event
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to listen for
listenerfunction: The object to be notified when the event (of the specifiedtype) happens
RemoveEventListener
removeEventListener()is a common BrightSign method that is
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used to remove an event listener.
Syntax:
| Code Block | ||
|---|---|---|
| ||
target.removeEventListener(type, listener |
...
); |
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typestring
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: Specifies the type of event
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Reserved Methods:
The following methods are reserved for BrightSign use only:
checkPassword()
getDigestHash()
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to listen for
listenerfunction: The object to be notified when the event (of the specifiedtype) happens
Example
| Code Block | ||
|---|---|---|
| ||
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); |