css makes hidden visible

CSS is a front-end development language commonly used to control the style and layout of web pages. In web development, sometimes you need to hide certain elements, but then need to show them in subsequent operations. This article will introduce how to use CSS to display hidden elements.

1. Hidden elements

In CSS, if you want to hide an element, you can use the display attribute. This attribute has multiple values ​​to choose from, including none, block, inline, inline-block, table, etc.

When the value of display is none, the element will be completely hidden and the space it occupies will not be retained; other values ​​will be displayed according to their corresponding rules.

For example, we can use the following code to hide a div element:

div {
  display: none;
}

2. Show hidden elements

Now that we have hidden an element, How to display it in subsequent operations?

You can use another value of display - block, inline, inline-block. These values ​​can display the element as a block-level element, an inline element, or an inline block-level element.

For example, if you want to display a hidden div element, you can use the following code:

div {
  display: block;
}

After setting the value of display to block, the element will be displayed as block level element.

3. Use JavaScript to display elements

In addition to using CSS to display a hidden element, we can also use JavaScript to achieve this.

First, we need to get the DOM object of the element we want to display, and then set the style.display attribute of the element to the corresponding value. For example, if the element is originally hidden by display:none, we can set its style.display property to block or another value to display it.

The following is a sample code that implements JavaScript to display hidden elements:

<script>
function showElement() {
  var element = document.getElementById("hidden-element");
  element.style.display = "block";
}
</script>

In this example, we define a function named showElement() to display an element on the page. Hidden elements. This function first obtains the element to be displayed through document.getElementById(), and then sets the style.display property of the element to block. This way, the element will be displayed.

4. Summary

In web development, hiding elements is a frequently used function. Elements can be easily hidden and shown using the display property in CSS. In addition, we can also use JavaScript to dynamically control the display and hiding of elements.

The above is the content introduced in this article. I hope it will be helpful for everyone to understand and apply the hiding and showing functions in CSS.

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