Iframe content is added in repo in this commit

src/test/java/Techniques/IFrame/IframeQs.java

+package Techniques.IFrame;
+
+import org.openqa.selenium.By;
+import org.openqa.selenium.WebDriver;
+import org.openqa.selenium.firefox.FirefoxDriver;
+import org.openqa.selenium.interactions.Actions;
+import org.openqa.selenium.support.ui.ExpectedConditions;
+import org.openqa.selenium.support.ui.WebDriverWait;
+
+import java.time.Duration;
+
+public class IframeQs {
+    public static void main(String[] args) {
+        WebDriver obj = new FirefoxDriver();
+
+        obj.get("https://jqueryui.com/droppable/");
+
+        WebDriverWait wait = new WebDriverWait(obj, Duration.ofSeconds(5));
+
+
+        obj.switchTo().frame(obj.findElement(By.cssSelector("iframe.demo-frame")));
+
+        Actions drag = new Actions(obj);
+
+        wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("draggable")));
+        drag.dragAndDrop(obj.findElement(By.id("draggable")),obj.findElement(By.id("droppable"))).build().perform();
+
+        obj.switchTo().defaultContent();
+
+
+        drag.scrollByAmount(0,500).build().perform();
+    }
+}

[Arsam Ali]

Kindly add explanation of each line of code that explain why you are using this technique