lib/less-browser/bootstrap.js
function resolveOrReject(data) {
    if (data.filename) {
        console.warn(data);
    }
    if (!options.async) {
        head.removeChild(style);
    }
}
function resolveOrReject(data) {
    if (data.filename) {
        console.warn(data);
    }
    if (!options.async) {
        head.removeChild(style);
    }
}
function resolveOrReject ( data ) { if ( data . filename ) { console . warn ( data ) ; } if ( ! options . async ) { head . removeChild ( style ) ; } }
Always restore page visibility
Always restore page visibility