我在浏览器控制台中收到错误::
glyphicons-halflings-regular.woff2:1 Failed to load resource: the server responded with a status of 404 (Not Found)
glyphicons-halflings-regular.woff:1 Failed to load resource: the server responded with a status of 404 (Not Found)
glyphicons-halflings-regular.ttf:1 Failed to load resource: the server responded with a status of 404 (Not Found)
当我检查元素时,我看到::
::before == $0
这是什么意思 ?
inspect元素中的css显示::
a[aria-expanded="false"]::before, a[aria-expanded="true"]::before {
content: '\e259';
display: block;
position: absolute;
right: 20px;
font-family: 'Glyphicons Halflings';
font-size: 0.6em;
}
a[aria-expanded="true"]::before {
content: '\e260';
}
这是什么意思content: '\e259'
; ?