How do I create a loop?

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I need to write a loop which adds 10 div elements and sets the contents to the count value ( 1, 2, 3, …). Set the color of the first five elements are red and the last five elements are green using these methods : attr(), property() and style()

My attempt does not show colors and I have not used attr()

What I have tried:

<script src='https://d3js.org/d3.v7.min.js'></script>
<style>
	.demo {
		color: 'red'
	}
</style>

<div id="demo">
<script>
	let text = "";
for (let i = 1; i < 5; i++) {
  text += i + "<br>";
}
document.getElementById("demo").innerHTML = text;

</div>

<div id="demo2">
	<script>
		let text2 = "";
for (let i = 5; i <=10 ; i++) {
  text2 += i + "<br>";
}
document.getElementById("demo2").innerHTML = text2;
	</script>
</div>


<script>
	d3.selectAll(".demo2").style('color','green');
</script>

Posted 16-Jan-22 7:42am

123usersomeone

Updated 16-Jan-22 7:54am

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M Imran Ansari · Answer 1 · 2022-01-16T07:54:00

Use the following code:

<script src='https://d3js.org/d3.v7.min.js'></script>
<style>
	.redColor {
		color: 'red'
	}
	.greenColor {
		color: 'green'
	}
</style>

<div id="demo">
<script>
	let text = "";
	for (let i = 1; i <= 10; i++) {		
		if(i<=5)
		{
			text += i + "<br>";
			document.getElementsByTagName("TagName")[0].setAttribute("class", "redColor");
		}	
		else
		{
			text2 += i + "<br>";
			document.getElementsByTagName("TagName")[0].setAttribute("class", "greenColor");
		}	
	}
</script>
</div>