Question

Below is my code fragment:

<div onclick = "myClick('value 1')">
    button 1
</div>
 <div onclick = "myClick('value 2')">
    button 2
</div>

Basically when I for each click on a different div, a different value will be passed to the JavaScript function.

My Question is how can I keep track of the value passed in the previous click?

For example, I click “button 1”, and “value 1” will be passed to the function. Later, I click on “button 2”, I want to be able to know whether I have clicked “button 1” before and get “value 1”.

Answer 1

You can define somekind of variable, like var lastUsed;
add additional line to your function:

var lastUsed = null;
function myClick(value){
  prevClicked = lastUsed; //get the last saved value
  ...
  lastUsed = value; //update the saved value to the new value
  ...
}

And here you go