The syntax used to display counters in CSS cannot be displayed correctly;content: counter(linenumber);

[jifafa484]

content: counter(linenumber);
1、Cannot render：
span::before {
counter-increment: linenumber;
content: counter(linenumber);
display: block;
width: 100%;
height: 50px;
background: #e0e0e0;
margin-top: 20px;
}
2、Can render：
span::before {
content: ‘1’;
display: block;
width: 100%;
height: 50px;
background: #e0e0e0;
margin-top: 20px;
}