Remove Box Shadow from Left Side - css

Question

I'm creating a custom sider toggle for an ant design project and I'm struggling to preserve three sides (i.e top, right, left) of the box-shadow (i.e. 2px 2px 8px rgba(0, 0, 0, 0.15)) and remove the box-shadow/blur entirely from the left side. My most recent attempt is below. Any thoughts?
JSX:
<span onClick={this.toggleCollapse} className="ant-layout-sider-zero-width-trigger">
{collapsed ? <Icon type="menu-unfold" /> : <Icon type="menu-fold" />}
</span>
LESS:
.ant-layout-sider-zero-width-trigger {
background: #fff;
color: #000000a6;
box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.15), inset -2px 0px 0px #fff;
&:hover {
background: #fff;
}
}
btw I've seen similar questions on Stack but none worked for me after much experimentation.

Answer 1

An idea is to use another container and rely on some overflow:
.container {
display:inline-block;
padding:5px 5px 5px 0;
overflow:hidden;
}
.box {
width:200px;
height:50px;
background: #fff;
color: #000000a6;
box-shadow:
2px 2px 8px rgba(0, 0, 0, 0.15),
inset -2px 0px 0px #fff;
}
<div class="container">
<div class="box">
</div>
</div>

Answer 2

You could increase the offset of the shadow and reduce its size:
html {
background: white;
}
body {
padding: 2em;
margin: 2em;
background: yellow;
box-shadow: 4px 4px 8px -4px, inset -2px 0px 0px #fff;
}