nl_tokens: Loads a CSS stylesheet into the page .
pl_tokens: function loadCSS ( cssUrl , currentLink ) { return new Promise ( resolve => { const link = document . createElement ( 'link' ) ; link . rel = 'stylesheet' ; link . type = 'text/css' ; link . href = cssUrl ; if ( 'onload' in <mask> ) { link . onload = ( ) => { link . onload = null ; resolve ( link ) ; } ; } else { // just wait 500ms if the browser doesn't support link.onload // https://pie.gd/test/script-link-events/ // https://github.com/ariya/phantomjs/issues/12332 setTimeout ( ( ) => resolve ( link ) , 500 ) ; } document . head . insertBefore ( link , currentLink ? currentLink . nextSibling : null ) ; } ) ; }