How to make a box in javascript

How to make a box in JavaScript

In web development, the box is a very common UI element. Boxes can be used to separate content and make it easier to manage and organize. Fortunately, with JavaScript we can create our own boxes very easily. In this article, I'll share how to create a basic box using pure JavaScript and show you how to customize it.

Create a simple box

Let's start with a very basic box that will contain a title and some content. We'll use HTML and CSS to create the appearance of the box, and then use JavaScript to dynamically add it to the page. Here is the HTML we want to create:

<div id="myBox">
  <h2>这是一个框</h2>
  <p>这里是一些内容。</p>
</div>

This will create a simple box with a title and content. Next, we can use CSS to add some styling to the box:

#myBox {
  border: 1px solid black;
  padding: 10px;
  background-color: #f8f8f8;
  width: 300px;
}

#myBox h2 {
  margin-top: 0;
}

#myBox p {
  margin-bottom: 0;
}

This will add a border, padding, background color, and fixed width to our box, as well as minimize the white space between the title and content.

Now we can add the box to the page using JavaScript. We will create a new div element using the document.createElement() function and add HTML content to it using innerHTML. Finally, we can add it to the parent element on the page using the appendChild() function.

const parentElement = document.querySelector('#container');
const boxElement = document.createElement('div');
boxElement.innerHTML = `
  <div id="myBox">
    <h2>这是一个框</h2>
    <p>这里是一些内容。</p>
  </div>
`;
parentElement.appendChild(boxElement.firstChild);

This will create and add our box element to its containing container element. Now when the page loads we should see a box with a title and content.

Custom Box

Now that we have created a basic box, we can use JavaScript to add more dynamic, custom functionality to it.

For example, we can use the querySelector() function to get the title element in the box, and then use innerHTML to change the title text:

const titleElement = boxElement.querySelector('h2');
titleElement.innerHTML = '这是一个自定义框';

We can also add buttons that allow the user to click the button to show or hide the box. First, we will create two button elements and add click event handlers to them. We will then use CSS to control the visibility of the box and add buttons to the box.

const button1 = document.createElement('button');
button1.innerHTML = '显示框';
button1.addEventListener('click', () => {
  boxElement.classList.remove('hidden');
});

const button2 = document.createElement('button');
button2.innerHTML = '隐藏框';
button2.addEventListener('click', () => {
  boxElement.classList.add('hidden');
});

const buttonContainer = document.createElement('div');
buttonContainer.appendChild(button1);
buttonContainer.appendChild(button2);
boxElement.appendChild(buttonContainer);

/* 在CSS中添加以下样式 */
.hidden {
  display: none;
}

Now we can show or hide our custom box by clicking the button.

Conclusion

By using JavaScript, we can easily create powerful custom boxes and add various dynamic features. This article provides a basis for creating boxes from scratch, but you can use more CSS and JavaScript techniques to create more complex boxes and custom functionality. Hopefully this simple example will help you get started and start creating your own boxes.

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