Function styleToClass

mini-code-edit/cm/lib/codemirror.js:2525–2528

(style)

      var st = this.styles, allText = this.text, marked = this.marked;
      var len = allText.length;
      function styleToClass(style) {
        if (!style) return null;
        return "cm-" + style.replace(/ +/g, " cm-");
      }

      if (!allText && wrapAt == null) {
        span(" ");