code: function() {
          var wxLiner = new WxChart.WxLiner('multiFillLine', {
              width: canvasWidth,
              height: canvasHeight,
              title: '销售额',
              yScaleOptions: {
                  position: 'left',
                  title: '万元'
              },
              crossScaleOptions: {
                  xFirstPointSpace: 0
              },
              legends: [{
                  text: '日用品',
                  key: 'dailyNecessities',
                  fillArea: true,
                  fillStyle: '#3385ff',
                  strokeStyle: '#3385ff'
              }, {
                  text: '水果',
                  key: 'fruit',
                  fillArea: true,
                  fillStyle: '#238456',
                  strokeStyle: '#238456'
              }, {
                  text: '家电',
                  key: 'appliances',
                  fillStyle: '#842c05',
                  strokeStyle: '#842c05'
              }]
          });
  
          wxLiner.update(dataGenerator(labels, ['dailyNecessities', 'fruit', 'appliances']));
  
          return wxLiner;
      }
docs: 线状图