Meaning of ${} in javascript

Question

I need to work on javascript lately. Unfortunately, I am a newbie.
I have come across the following code and don't understand the meaning of ${count == 0}.

function body_onload()
{
    if(${count == 0})
    {
        document.getElementById("dispaly").style.display="none";
    }   
    scanImageReportFrom.shopCodes.focus();
}

Thank you.

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Finally I found this that can solve my question.

Answer 1

It's not you. :-) That's not valid JavaScript (the { triggers a syntax error).

It could perhaps be a token for some pre-processor that replaces it with something before the JavaScript is passed to the JavaScript engine.