How do I add a logic to control CSS "After" Pseudo-elements? - css

Question

Currently I have this html in pug and vue code which is working fine. Basically the arrow width is dynamic.
.abc--step-bar: .abc--step-bar-color(:style="`width: ${progressBar.width}`")
.row
.col(v-for="(item, i) in progressItems")
.abc--step-item(:class="{ 'is__done': progressBar.index > i, 'is__current': progressBar.index === i }")
span.abc--step-dot
This is my css using SCSS
.abc--step-bar {
position: absolute;
top: 0;
left: 16.7%;
right: 16.7%;
height: 3px;
background: #e8e8e8;
}
.abc--step-bar-color {
background: #28A745;
position: absolute;
top: 0; bottom: 0; left: 0;
&:after {
color: #28A745;
content: url("../../assets/images/arrow.png");;
display: inline-block !important;
width: 0;
height: 0;
position: absolute;
right: 6px;
top: -6px;
}
}
.abc--step-dot {
display: inline-block;
width: 15px;
border-radius: 50%;
height: 15px;
background: #e8e8e8;
border: 5px solid #e8e8e8;
position: relative;
top: -7px;
.is__done &,
.is__current & {
border: 5px solid #28A745;
//background: #28A745;
}
}
I use the image for the arrow head.
I do not know how I can hide the arrow head with certain logic using Vuejs. i.e. when the progressBar.index equals 1. My arrow head is at after Pseudo-element.
I tried to put the similar example in my codepen.
https://codepen.io/steve-ngai-chee-weng/pen/xxXmRer

Answer 1

Use a Vue-conditional CSS class hide-arrow that hides it. JS cannot access pseudo elements directly.
.abc--step-bar-color.hide-arrow::after { content: ""; }
Please note that :after is very old CSS 2.1 syntax. In CSS 3 pseudo elements must be prefixed with ::.