Wang Xin

``` function handle(string){ return Array.prototype.map.call(string, (item)=>{ return item === item.toUpperCase() ? item.toLowerCase() : item.toUpperCase(); }).join('') } ```

``` function handle(arr){ let result = [], wei = 0; [...new Set(arr)].sort((a,b)=> a - b).forEach(item=>{ if(item >= 10*wei && item < 10 * (wei+1)){ result[wei] ? result[wei].push(item) : (result[wei] =...

I met the error, too. You can solve it by use isomorphic-style-loade for client render instead of style-loader.