CraigZeng

When i set [mousetrap] classname in the target react node, the real target may still not has class mousetrap

``` javascript function pascal(depth) { var result = [[1],[1, 1]]; if(depth==1){ return result.splice(0,1)}; if(depth==2){ return result}; for(var i = 2 ; i< depth; i++){ result[i] = [1]; result[i-1].reduce(function(prev, current){result[i].push(prev+current);return current;});...