site-z/TestNeuse.html at master · LFF5644/site-z · GitHub

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<!DOCTYPE  html>

<html>

<title>My title</title>

<body>

<h2>Hallo Welt</h2>
<button onclick="alert('Wustest du das ich ein Button bin?')" id="button1">ERROR</button><br>
<button onclick="document.getElementById('button1').innerText='ich kann nicht nerven!'" id="button2">ERROR</button><br>
<input id="numPad1" value="1" type="number"/>
<input id="numPad2" value="1" type="number"/>
<button id="Button_adiren" onclick="addiren(false)">ADDIRE 1 + 1</button>
<p id="info"/>
<checkbox id="Checkbox_alert"/>
<h2>Tschüss Welt</h2>

<script>
document.getElementById("button1").innerText="Ich kann reden"
document.getElementById("button2").innerText="ich kann naemen ändern!"
function addiren(alert_=true,num1="NOTHING",num2="NOTHING"){
	let erg=0

	if(num1=="NOTHING"){
	num1=Number(document.getElementById("numPad1").value);
	num2=Number(document.getElementById("numPad2").value);
	}
	erg=num1+num2

	if(alert_==true){
		alert(erg)
	}
	else if(alert_==false){
		console.log(String(erg))
	}
	document.getElementById("info").innerText=num1+" + "+num2+" = "+erg
	return erg
}
</script>

</body>

</html>