<!DOCTYPE html>
<html>
<body>
<div id="find-me"></div>
<script>
var elementExists = document.getElementById("find-me");
if (typeof(elementExists) != 'undefined' && elementExists != null)
{
alert("find-me id exist");
}
var h5 = document.querySelector('h5');
if (typeof(h5) != 'undefined' && elementExists != null)
{
alert("h5 not exist");
}
</script>
</body>
</html> Golang Tutorial
Introduction Variables Constants Data Type Convert Types Operators If..Else Switch..Case For Loops Functions Variadic Functions Deferred Functions Calls Panic and Recover Arrays Slices Maps Struct Interface Goroutines Channels Concurrency Problems Logs Files and Directories Reading and Writing Files Regular Expression Find DNS records Cryptography Gotchas in Golang Import and Export Best Golang Packages Web Application Goroutines and Channels Exercises Reflection in Golang Golang for beginners Strings in Golang HTTP Client Server Examples Context PackageGolang Reference
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