html - How can I prevent the browser from scrolling on top of the page when clicking the checkbox?

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html - How can I prevent the browser from scrolling on top of the page when clicking the checkbox?

posted Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

html - How can I prevent the browser from scrolling on top of the page when clicking the checkbox?

Whenever I click on the checkbox, the browser window (firefox) will scroll on the top of the screen.
How can I prevent this behavior so when I click on the checkbox the browser window will not scroll on top?
Here is the code found from here http://jsfiddle.net/zAFND/6/
Thank you.

<html>
    <head>
        <title>Test</title>
        <style>
            div label input {
                margin-right: 100px;
            }

            body {
                font-family:sans-serif;
            }

            #ck-button {
                margin: 4px;
                background-color: #EFEFEF;
                border-radius: 4px;
                border: 1px solid #D0D0D0;
                overflow: auto;
                float: left;
            }

            #ck-button {
                margin: 4px;
                background-color: #EFEFEF;
                border-radius: 4px;
                border: 1px solid #D0D0D0;
                overflow: auto;
                float: left;
            }

            #ck-button:hover {
                margin: 4px;
                background-color: #EFEFEF;
                border-radius: 4px;
                border: 1px solid red;
                overflow: auto;
                float: left;
                color: red;
            }

            #ck-button label {
                float: left;
                width: 4.0em;
            }

            #ck-button label span {
                text-align: center;
                padding: 3px 0px;
                display: block;
            }

            #ck-button label input {
                position: absolute;
                top: -20px;
            }

            #ck-button input:checked + span {
                background-color: #911;
                color: #fff;
            }
        </style>    
</head>
    <body>
        <br>
        <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
        <div id="ck-button">
            <label>
                <input type="checkbox" value="1"><span>red</span>
            </label>
        </div>
    </body>

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1 Reply

深蓝 · Answer 1 · 2021-10-23T19:16:34+0000

The problem is this rule:

#ck-button label input {
  position:absolute;
  top:-20px;
}

When you click on a label the browser tries to focus the related input. In your case the checkbox element is lying at the top of the page, even outside the viewport – so Firefox tries to scroll there.

You can solve it like this by adding:

#ck-button label {
  display: block;
  position: relative;
  overflow: hidden;
}

Demo

Try before buy

Alternative

Heisenberg points out a problem in his answer which can occur when using extreme values. Unfortunately the proposed idea has the same quirk as the one shown above.

So an alternative solution is simply to hide the input. The functionality is not affected.

CSS

#ck-button label input {
  display: none;
}

Demo

Try before buy

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html - How can I prevent the browser from scrolling on top of the page when clicking the checkbox?

html - How can I prevent the browser from scrolling on top of the page when clicking the checkbox?

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