我在用滑块改变div的透明度时遇到了一点麻烦。以下是我正在使用的jsfiddle链接:https://jsfiddle.net/yfmLk1ad/1/
$('#bgopacity').on('slide', function(value) {
$('.background-color').css({
opacity: value * '.01'
});
});
.background-color {
width: 500px;
height: 500px;
background: red;
opacity: .5;
}
<div class="background-color"></div>
<form>
<label>Color Opacity</label>
<input type="range" name="bgopacity" id="bgopacity" value="50" min="0" max="100" step="1" onchange="rangevalue.value=value">
<output id="rangevalue">50</output>
</form>