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Trigger a keyup event function on meeting a certain condition in vanilla javascript

July 14, 2022

I have a piece of code where the user when he/she presses NumpadEnter key, a certain function triggers:

document.addEventListener("keyup", function(event) {
    if (event.code === "NumpadEnter") {   
         //some logic here    
    }
}

Now I want to trigger this keyup function when a certain condition is met:

if(flag == true){
    //trigger the keyup listener
}

How do I do that?

>Solution :

Don’t trigger the event. Instead place the logic in a separate function that both the event handler and the other code will call:

function performAction() {
   // logic here
}

document.addEventListener("keyup", function(event) {
    if (event.code === "NumpadEnter") {   
         performAction(); 
    }
}

// Now I want to trigger this keyup function when a certain condition is met:

if (flag == true){
    performAction();
}