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This article is about how to achieve the top effect of a web page through JS/CSS. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

CSS button style:

# myBtn {

Display: none; / * hidden by default * /

Position: fixed

Bottom: 20px

Right: 30px

Z-index: 99

Border: none

Outline: none

Background-color: red; / * set the background color, you can set the color or picture you want * /

Color: white; / * text color * /

Cursor: pointer

Padding: 15px

Border-radius: 10px; / * fillet * /

}

# myBtn:hover {

Background-color: # 555

}

JS Code:

/ / when the web page slides down, 20px appears the "return to the top" button

_ window.onscroll = function () {scrollFunction ()}

Function scrollFunction () {console.log (121)

If (document.body.scrollTop > 20 | | document.documentElement.scrollTop > 20) {

Document.getElementById ("myBtn") .style.display = "block"

} else {

Document.getElementById ("myBtn") .style.display = "none"

}

}

/ / Click the button to return to the top

Function topFunction () {

Document.body.scrollTop = 0

Document.documentElement.scrollTop = 0

}

Thank you for reading! This is the end of this article on "how to achieve the top effect of web pages through JS/CSS". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

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