JavaScript_basic/five.html at main · deepeshahirwar/JavaScript_basic · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>DOM -> child and parent relation</title>
    <style>
   .container {
  display: flex;
  gap: 2rem;
  flex-direction: column;
}

button {
  width: 100px;
  background: #E4E5E9;
  border: none;
  width: 8rem;
  height: 2rem;
  font-size: 16px;
  box-shadow: 3px 2px 3px black;
}
button:hover{
  width: 9rem;
  height: 2.5rem;
   transition: ease-in-out 0.3s;
   background-color: rgb(66, 133, 244);
   box-shadow: 3px 2px 3px rgba(0, 0, 0, 0.797);
   color: white;
}

div.parent {
  border: 1px solid black;
  padding: 5px;
  width: 100px;
  height: 100px;
}
div.child {
  border: 1px solid red;
  margin: 10px;
  padding: 5px;
  width: 80px;
  height: 60px;
  box-sizing: border-box;
}
    </style>
</head>
<body>
    <div class="container">
        <div class="parent">parent</div>
        <button id="add-child" type="button">Add a child</button>
        <button id="remove-child" type="button">Remove child</button>
      </div>
</body>

<script>
// how to add-child  and how to remove-child it
const parent = document.body.querySelector(".parent");

 const addChild = document.body.querySelector("#add-child");
 addChild.addEventListener("click", ()=>{
    // Only add a child if we don't already have one
  // in addition to the text node "parent"
  if (parent.childNodes.length > 1) {
    return;
  }
  const child = document.createElement("div");
  child.classList.add("child");
  child.textContent = "i am child";
  parent.appendChild(child);
 });

//   for remove child
const removeChild = document.body.querySelector("#remove-child");
removeChild.addEventListener("click", () =>{
    const child = document.body.querySelector(".child");
    parent.removeChild(child);
});
</script>
</html>