Method slice

devui/dragdrop/shared/utils.ts:78–96

(args, slice?, sliceEnd?)

  }

  public static slice(args, slice?, sliceEnd?) {
    const ret = [];
    let len = args.length;

    if (len === 0) {
      return ret;
    }

    const start = slice < 0 ? Math.max(0, slice + len) : slice || 0;

    if (sliceEnd !== undefined) {
      len = sliceEnd < 0 ? sliceEnd + len : sliceEnd;
    }

    while (len-- > start) {
      ret[len - start] = args[len];
    }
    return ret;
  }

  // 动态添加styles
  public static addElStyles(el: any, styles: any) {