Question

There is a button (actually a lot of them), it has an event handler:

el.onclick = function(){
    if(this.className.indexOf("minimized") != -1){
        this.firstChild.nodeValue = 'turn back';
        this.className = this.className.replace("minimized", 'expanded');
    }
    else if(this.className.indexOf("expanded") != -1){
        this.firstChild.nodeValue = 'what was there before the first click';
        this.className = this.className.replace("expanded", 'minimized');
    }
}

Handler changes the state of the button.

What is the standard way (pattern) to memorize a text node before the first click on current button and return it on the second click (on the same button)?

---

Can you remember text node in a javascript variable, and not used for storing information HTML elements?

Without the use of global variables.

Answer 1

You can create a property on the element itself, for example:

el.onclick = function(){
    if(this.className.indexOf("minimized") != -1){
        this.originalText = this.firstChild.nodeValue; //store original
        this.firstChild.nodeValue = 'turn back';       //change it
        this.className = this.className.replace("minimized", 'expanded');
    }
    else if(this.className.indexOf("expanded") != -1){
        this.firstChild.nodeValue = this.originalText; //restore it
        this.className = this.className.replace("expanded", 'minimized');
    }
}