css show hide div

CSS plays an important role in web design. It can not only beautify web pages, but also achieve some user interaction effects. This article will explain how to use CSS to show and hide divs.

1. Use the display attribute to display and hide divs

The display attribute is used to specify the display mode of elements. Common values ​​​​are none and block. Among them, none means to hide the element, and block means to display the element as a block element. Therefore, we can display and hide divs by controlling the display attribute.

1.1 Hiding a div

To hide a div, just set its display attribute to none. Here is an example:

<div id="myDiv" style="display:none;">这是要隐藏的div</div>

In the above code, we have added an id attribute to the div tag to style it in CSS. At the same time, we set the display attribute of the div to none so that it will be hidden.

1.2 Display div

To display a hidden div, just set its display attribute to block or other visible value. The following is an example:

<button onclick="showDiv()">点击显示div</button>
<div id="myDiv" style="display:none;">这是要显示的div</div>
<script>
function showDiv() {
  document.getElementById("myDiv").style.display = "block";
}
</script>

In the above code, we added a button and bound an onclick event to it. When the user clicks the button, the showDiv() function will be called to change the div's The display attribute is set to block so that it is displayed.

2. Use the visibility attribute to display and hide divs

The visibility attribute is used to specify the visibility of elements. Common values ​​​​are visible and hidden. Among them, hidden means hiding the element, and visible means making the element visible. Therefore, we can also display and hide divs by controlling the visibility attribute.

2.1 Hiding a div

To hide a div, just set its visibility attribute to hidden. Here is an example:

<div id="myDiv" style="visibility:hidden;">这是要隐藏的div</div>

In the above code, we have added an id attribute to the div tag to style it in CSS. At the same time, we set the visibility property of the div to hidden so that it will be hidden.

2.2 Display div

To display a hidden div, just set its visibility property to visible. The following is an example:

<button onclick="showDiv()">点击显示div</button>
<div id="myDiv" style="visibility:hidden;">这是要显示的div</div>
<script>
function showDiv() {
  document.getElementById("myDiv").style.visibility = "visible";
}
</script>

In the above code, we added a button and bound an onclick event to it. When the user clicks the button, the showDiv() function will be called to change the div's The visibility property is set to visible to make it visible.

3. Conclusion

Through the above examples, we can see that the display and hiding of divs can be achieved using the display and visibility attributes. The difference is that the display attribute will completely remove the element from the page, while the visibility attribute just hides the element. Therefore, if we need to preserve the position of an element between hiding and showing, we should choose to use the visibility attribute.

Of course, for a better user experience, we can also use CSS animation to add gradients or other effects to the display and hiding of divs. This needs to be achieved by combining the transition or animation attributes of CSS. Interested readers can find relevant tutorials online.

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