Page Comparison

AddEventListener

addEventListener() is a common BrightSign method that is used to listen for an event.

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target.addEventListener(type, listener);

• [type string] type: Specifies  Specifies the type of event to listen for

• [listener function] listener: The object to be notified when the event (of the specified type) happens 

RemoveEventListener

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target.removeEventListener(type, listener);

• [type string] type: Specifies the type of event to listen for

• [listener function] listener: The   The object to be notified when the event (of the specified type) happens 

Example

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);

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