Auto footer copyright year with Javascript

I have seen this done with PHP before and have done it myself with PHP. But I realized why not use JavaScript. It's very simple.

(function (){
var date=new Date();
if(document.querySelector("#auto-year-update")!==null){
document.querySelector("#auto-year-update").innerText=date.getFullYear();
}
})();

Code (JavaScript):

With this code we would just need to replace the year 2019 with a <span id="auto-year-update"></span> which will then be populated with the current year.

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