echarts X轴文字的换行

xAis: {
  axisLabel:{
         formatter: function(params) {
                    var newParamsName = '';
                    var paramsNameNumber = params.length;
                    var provideNumber = 3; //单行文字的个数
                    var rowNumber = Math.ceil(paramsNameNumber / provideNumber);
                    for (let row = 0; row < rowNumber; row++) {
                        newParamsName +=
                            params.substring(
                                row * provideNumber,
                                (row + 1) * provideNumber
                            ) + '\n'
                    }
                    return newParamsName
                }
  }
}