How do I pass button as a parameter to a function?

Question

I have a function that calls another function. My goal is to pass button as a parameter to another function.

function A(){
    var btn = $find("<%=btnX.ClientID %>");
    B(btn);
}

function B(*btn parameter here*){
//I need button here
}

Answer 1

You sort of dont even have a issue since it should already work...

 function A(){ // var btn = $find("<%=btnX.ClientID %>"); btn = "test" // remove this "test" line B(btn); } function B(button){ //I need button here console.log(button) } A()

Answer 2

It should just work. Do you see any errors there?

 function A(){ var btn = $find("<%=btnX.ClientID %>"); B(btn); } function B(button){ // Do with that button whatever you want here. Eg button.style.color = 'cyan'; } A()

Answer 3

Try this with any selector. It should just work

function A(){
    var btn = "#btn";
    B(btn);
}

function B(button){
  // Do with that button whatever you want here. E.g.
  var btn = document.querySelector(button);

  btn.style.backgroundColor = 'red';
  btn.style.color = 'white';
}

A();

 function A(){ var btn = "#btn1"; B(btn); } function B(button){ // Do with that button whatever you want here. Eg var btn = document.querySelector(button); console.log(button); btn.style.backgroundColor = 'red'; btn.style.color = 'white'; } A();

 <button id="btn0">click button</button> <button id="btn1">click button</button>