diff --git a/node_modules/echarts/lib/component/dataZoom/DataZoomModel.js b/node_modules/echarts/lib/component/dataZoom/DataZoomModel.js
index d6c05f3..aafb0b8 100644
--- a/node_modules/echarts/lib/component/dataZoom/DataZoomModel.js
+++ b/node_modules/echarts/lib/component/dataZoom/DataZoomModel.js
@@ -362,7 +362,10 @@ var DataZoomModel = /** @class */function (_super) {
         return axisProxy.getDataValueWindow();
       }
     } else {
-      return this.getAxisProxy(axisDim, axisIndex).getDataValueWindow();
+      var axisProxy = this.getAxisProxy(axisDim, axisIndex);
+      if (axisProxy) {
+        return axisProxy.getDataValueWindow();
+      }
     }
   };
   /**
@@ -381,10 +384,10 @@ var DataZoomModel = /** @class */function (_super) {
       var axisInfo = this._targetAxisInfoMap.get(axisDim);
       for (var j = 0; j < axisInfo.indexList.length; j++) {
         var proxy = this.getAxisProxy(axisDim, axisInfo.indexList[j]);
-        if (proxy.hostedBy(this)) {
+        if (proxy && proxy.hostedBy(this)) {
           return proxy;
         }
-        if (!firstProxy) {
+        if (proxy && !firstProxy) {
           firstProxy = proxy;
         }
       }
diff --git a/node_modules/echarts/lib/component/dataZoom/InsideZoomView.js b/node_modules/echarts/lib/component/dataZoom/InsideZoomView.js
index 06469b2..cf0b2ea 100644
--- a/node_modules/echarts/lib/component/dataZoom/InsideZoomView.js
+++ b/node_modules/echarts/lib/component/dataZoom/InsideZoomView.js
@@ -96,11 +96,14 @@ var getRangeHandlers = {
     range[0] = (range[0] - percentPoint) * scale + percentPoint;
     range[1] = (range[1] - percentPoint) * scale + percentPoint;
     // Restrict range.
-    var minMaxSpan = this.dataZoomModel.findRepresentativeAxisProxy().getMinMaxSpan();
-    sliderMove(0, range, [0, 100], 0, minMaxSpan.minSpan, minMaxSpan.maxSpan);
-    this.range = range;
-    if (lastRange[0] !== range[0] || lastRange[1] !== range[1]) {
-      return range;
+    var proxy = this.dataZoomModel.findRepresentativeAxisProxy();
+    if (proxy) {
+      var minMaxSpan = proxy.getMinMaxSpan();
+      sliderMove(0, range, [0, 100], 0, minMaxSpan.minSpan, minMaxSpan.maxSpan);
+      this.range = range;
+      if (lastRange[0] !== range[0] || lastRange[1] !== range[1]) {
+        return range;
+      }
     }
   },
   pan: makeMover(function (range, axisModel, coordSysInfo, coordSysMainType, controller, e) {
diff --git a/node_modules/echarts/lib/component/dataZoom/SliderZoomView.js b/node_modules/echarts/lib/component/dataZoom/SliderZoomView.js
index 98912e0..0cda6be 100644
--- a/node_modules/echarts/lib/component/dataZoom/SliderZoomView.js
+++ b/node_modules/echarts/lib/component/dataZoom/SliderZoomView.js
@@ -64,7 +64,7 @@ var DEFAULT_MOVE_HANDLE_SIZE = 7;
 var HORIZONTAL = 'horizontal';
 var VERTICAL = 'vertical';
 var LABEL_GAP = 5;
-var SHOW_DATA_SHADOW_SERIES_TYPE = ['line', 'bar', 'candlestick', 'scatter'];
+var SHOW_DATA_SHADOW_SERIES_TYPE = ['line', 'bar', 'candlestick', 'scatter', 'custom'];
 var REALTIME_ANIMATION_CONFIG = {
   easing: 'cubicOut',
   duration: 100,
@@ -359,30 +359,33 @@ var SliderZoomView = /** @class */function (_super) {
     var result;
     var ecModel = this.ecModel;
     dataZoomModel.eachTargetAxis(function (axisDim, axisIndex) {
-      var seriesModels = dataZoomModel.getAxisProxy(axisDim, axisIndex).getTargetSeriesModels();
-      each(seriesModels, function (seriesModel) {
-        if (result) {
-          return;
-        }
-        if (showDataShadow !== true && indexOf(SHOW_DATA_SHADOW_SERIES_TYPE, seriesModel.get('type')) < 0) {
-          return;
-        }
-        var thisAxis = ecModel.getComponent(getAxisMainType(axisDim), axisIndex).axis;
-        var otherDim = getOtherDim(axisDim);
-        var otherAxisInverse;
-        var coordSys = seriesModel.coordinateSystem;
-        if (otherDim != null && coordSys.getOtherAxis) {
-          otherAxisInverse = coordSys.getOtherAxis(thisAxis).inverse;
-        }
-        otherDim = seriesModel.getData().mapDimension(otherDim);
-        result = {
-          thisAxis: thisAxis,
-          series: seriesModel,
-          thisDim: axisDim,
-          otherDim: otherDim,
-          otherAxisInverse: otherAxisInverse
-        };
-      }, this);
+      var axisProxy = dataZoomModel.getAxisProxy(axisDim, axisIndex);
+      if (axisProxy) {
+        var seriesModels = axisProxy.getTargetSeriesModels();
+        each(seriesModels, function (seriesModel) {
+          if (result) {
+            return;
+          }
+          if (showDataShadow !== true && indexOf(SHOW_DATA_SHADOW_SERIES_TYPE, seriesModel.get('type')) < 0) {
+            return;
+          }
+          var thisAxis = ecModel.getComponent(getAxisMainType(axisDim), axisIndex).axis;
+          var otherDim = getOtherDim(axisDim);
+          var otherAxisInverse;
+          var coordSys = seriesModel.coordinateSystem;
+          if (otherDim != null && coordSys.getOtherAxis) {
+            otherAxisInverse = coordSys.getOtherAxis(thisAxis).inverse;
+          }
+          otherDim = seriesModel.getData().mapDimension(otherDim);
+          result = {
+            thisAxis: thisAxis,
+            series: seriesModel,
+            thisDim: axisDim,
+            otherDim: otherDim,
+            otherAxisInverse: otherAxisInverse
+          };
+        }, this);
+      }
     }, this);
     return result;
   };
@@ -530,12 +533,17 @@ var SliderZoomView = /** @class */function (_super) {
     var dataZoomModel = this.dataZoomModel;
     var handleEnds = this._handleEnds;
     var viewExtend = this._getViewExtent();
-    var minMaxSpan = dataZoomModel.findRepresentativeAxisProxy().getMinMaxSpan();
-    var percentExtent = [0, 100];
-    sliderMove(delta, handleEnds, viewExtend, dataZoomModel.get('zoomLock') ? 'all' : handleIndex, minMaxSpan.minSpan != null ? linearMap(minMaxSpan.minSpan, percentExtent, viewExtend, true) : null, minMaxSpan.maxSpan != null ? linearMap(minMaxSpan.maxSpan, percentExtent, viewExtend, true) : null);
-    var lastRange = this._range;
-    var range = this._range = asc([linearMap(handleEnds[0], viewExtend, percentExtent, true), linearMap(handleEnds[1], viewExtend, percentExtent, true)]);
-    return !lastRange || lastRange[0] !== range[0] || lastRange[1] !== range[1];
+    var proxy = dataZoomModel.findRepresentativeAxisProxy();
+    if (proxy) {
+      var minMaxSpan = proxy.getMinMaxSpan();
+      var percentExtent = [0, 100];
+      sliderMove(delta, handleEnds, viewExtend, dataZoomModel.get('zoomLock') ? 'all' : handleIndex, minMaxSpan.minSpan != null ? linearMap(minMaxSpan.minSpan, percentExtent, viewExtend, true) : null, minMaxSpan.maxSpan != null ? linearMap(minMaxSpan.maxSpan, percentExtent, viewExtend, true) : null);
+      var lastRange = this._range;
+      var range = this._range = asc([linearMap(handleEnds[0], viewExtend, percentExtent, true), linearMap(handleEnds[1], viewExtend, percentExtent, true)]);
+      return !lastRange || lastRange[0] !== range[0] || lastRange[1] !== range[1];
+    } else {
+      return false;
+    }
   };
   SliderZoomView.prototype._updateView = function (nonRealtime) {
     var displaybles = this._displayables;
diff --git a/node_modules/echarts/lib/component/dataZoom/dataZoomProcessor.js b/node_modules/echarts/lib/component/dataZoom/dataZoomProcessor.js
index ce98fed..e154118 100644
--- a/node_modules/echarts/lib/component/dataZoom/dataZoomProcessor.js
+++ b/node_modules/echarts/lib/component/dataZoom/dataZoomProcessor.js
@@ -90,7 +90,10 @@ var dataZoomProcessor = {
       // init stage and not after action dispatch handler, because
       // reset should be called after seriesData.restoreData.
       dataZoomModel.eachTargetAxis(function (axisDim, axisIndex) {
-        dataZoomModel.getAxisProxy(axisDim, axisIndex).reset(dataZoomModel);
+        var axisProxy = dataZoomModel.getAxisProxy(axisDim, axisIndex);
+        if (axisProxy) {
+          axisProxy.reset(dataZoomModel);
+        }
       });
       // Caution: data zoom filtering is order sensitive when using
       // percent range and no min/max/scale set on axis.
@@ -107,7 +110,10 @@ var dataZoomProcessor = {
       // So we should filter x-axis after reset x-axis immediately,
       // and then reset y-axis and filter y-axis.
       dataZoomModel.eachTargetAxis(function (axisDim, axisIndex) {
-        dataZoomModel.getAxisProxy(axisDim, axisIndex).filterData(dataZoomModel, api);
+        var axisProxy = dataZoomModel.getAxisProxy(axisDim, axisIndex);
+        if (axisProxy) {
+          axisProxy.filterData(dataZoomModel, api);
+        }
       });
     });
     ecModel.eachComponent('dataZoom', function (dataZoomModel) {
diff --git a/node_modules/echarts/lib/component/toolbox/feature/DataZoom.js b/node_modules/echarts/lib/component/toolbox/feature/DataZoom.js
index cf8d6bc..f9b9f90 100644
--- a/node_modules/echarts/lib/component/toolbox/feature/DataZoom.js
+++ b/node_modules/echarts/lib/component/toolbox/feature/DataZoom.js
@@ -109,9 +109,12 @@ var DataZoomFeature = /** @class */function (_super) {
       var axisModel = axis.model;
       var dataZoomModel = findDataZoom(dimName, axisModel, ecModel);
       // Restrict range.
-      var minMaxSpan = dataZoomModel.findRepresentativeAxisProxy(axisModel).getMinMaxSpan();
-      if (minMaxSpan.minValueSpan != null || minMaxSpan.maxValueSpan != null) {
-        minMax = sliderMove(0, minMax.slice(), axis.scale.getExtent(), 0, minMaxSpan.minValueSpan, minMaxSpan.maxValueSpan);
+      var proxy = dataZoomModel.findRepresentativeAxisProxy(axisModel);
+      if (proxy) {
+        var minMaxSpan = proxy.getMinMaxSpan();
+        if (minMaxSpan.minValueSpan != null || minMaxSpan.maxValueSpan != null) {
+          minMax = sliderMove(0, minMax.slice(), axis.scale.getExtent(), 0, minMaxSpan.minValueSpan, minMaxSpan.maxValueSpan);
+        }
       }
       dataZoomModel && (snapshot[dataZoomModel.id] = {
         dataZoomId: dataZoomModel.id,
diff --git a/node_modules/echarts/lib/component/tooltip/TooltipView.js b/node_modules/echarts/lib/component/tooltip/TooltipView.js
index b8a9b95..11e49c0 100644
--- a/node_modules/echarts/lib/component/tooltip/TooltipView.js
+++ b/node_modules/echarts/lib/component/tooltip/TooltipView.js
@@ -360,7 +360,7 @@ var TooltipView = /** @class */function (_super) {
       each(itemCoordSys.dataByAxis, function (axisItem) {
         var axisModel = ecModel.getComponent(axisItem.axisDim + 'Axis', axisItem.axisIndex);
         var axisValue = axisItem.value;
-        if (!axisModel || axisValue == null) {
+        if (!axisModel || !axisModel.axis || axisValue == null) {
           return;
         }
         var axisValueLabel = axisPointerViewHelper.getValueLabel(axisValue, axisModel.axis, ecModel, axisItem.seriesDataIndices, axisItem.valueLabelOpt);
diff --git a/node_modules/echarts/lib/coord/axisHelper.js b/node_modules/echarts/lib/coord/axisHelper.js
index a76c66b..e5b7ee5 100644
--- a/node_modules/echarts/lib/coord/axisHelper.js
+++ b/node_modules/echarts/lib/coord/axisHelper.js
@@ -187,7 +187,9 @@ export function createScaleByModel(model, axisType) {
         });
       default:
         // case 'value'/'interval', 'log', or others.
-        return new (Scale.getClass(axisType) || IntervalScale)();
+        return new (Scale.getClass(axisType) || IntervalScale)({
+          ticksGenerator: model.get('ticksGenerator')
+        });
     }
   }
 }
diff --git a/node_modules/echarts/lib/coord/cartesian/Grid.js b/node_modules/echarts/lib/coord/cartesian/Grid.js
index 5b18f02..39a57f8 100644
--- a/node_modules/echarts/lib/coord/cartesian/Grid.js
+++ b/node_modules/echarts/lib/coord/cartesian/Grid.js
@@ -91,11 +91,11 @@ var Grid = /** @class */function () {
         var scale = axis.scale;
         if (
         // Only value and log axis without interval support alignTicks.
-        isIntervalOrLogScale(scale) && model.get('alignTicks') && model.get('interval') == null) {
+        isIntervalOrLogScale(scale) && model.get('alignTicks') && model.get('interval') == null && model.get('ticksGenerator') == null) {
           axisNeedsAlign.push(axis);
         } else {
           niceScaleExtent(scale, model);
-          if (isIntervalOrLogScale(scale)) {
+          if (isIntervalOrLogScale(scale) && !scale.isBlank()) {
             // Can only align to interval or log axis.
             alignTo = axis;
           }
@@ -105,10 +105,15 @@ var Grid = /** @class */function () {
       // All axes has set alignTicks. Pick the first one.
       // PENDING. Should we find the axis that both set interval, min, max and align to this one?
       if (axisNeedsAlign.length) {
-        if (!alignTo) {
-          alignTo = axisNeedsAlign.pop();
-          niceScaleExtent(alignTo.scale, alignTo.model);
+        while (!alignTo && axisNeedsAlign.length) {
+          var axis = axisNeedsAlign.pop();
+          niceScaleExtent(axis.scale, axis.model);
+          if (!axis.scale.isBlank()) {
+            alignTo = axis;
+          }
         }
+      }
+      if (axisNeedsAlign.length && alignTo) {
         each(axisNeedsAlign, function (axis) {
           alignScaleTicks(axis.scale, axis.model, alignTo.scale);
         });
diff --git a/node_modules/echarts/lib/data/SeriesData.js b/node_modules/echarts/lib/data/SeriesData.js
index 98d5ce8..1c293a6 100644
--- a/node_modules/echarts/lib/data/SeriesData.js
+++ b/node_modules/echarts/lib/data/SeriesData.js
@@ -900,13 +900,16 @@ var SeriesData = /** @class */function () {
         var dimInfo = data._dimInfos[dim];
         // Currently, only dimensions that has ordinalMeta can create inverted indices.
         var ordinalMeta = dimInfo.ordinalMeta;
+        var stack = dimInfo.stack;
         var store = data._store;
-        if (ordinalMeta) {
-          invertedIndices = invertedIndicesMap[dim] = new CtorInt32Array(ordinalMeta.categories.length);
-          // The default value of TypedArray is 0. To avoid miss
-          // mapping to 0, we should set it as INDEX_NOT_FOUND.
-          for (var i = 0; i < invertedIndices.length; i++) {
-            invertedIndices[i] = INDEX_NOT_FOUND;
+        if (ordinalMeta || stack) {
+          invertedIndices = invertedIndicesMap[dim] = stack ? new Array(store.count()) : new CtorInt32Array(ordinalMeta.categories.length);
+          if (ordinalMeta) {
+            // The default value of TypedArray is 0. To avoid miss
+            // mapping to 0, we should set it as INDEX_NOT_FOUND.
+            for (var i = 0; i < invertedIndices.length; i++) {
+              invertedIndices[i] = INDEX_NOT_FOUND;
+            }
           }
           for (var i = 0; i < store.count(); i++) {
             // Only support the case that all values are distinct.
diff --git a/node_modules/echarts/lib/data/Source.js b/node_modules/echarts/lib/data/Source.js
index 7dda49b..2dd2b98 100644
--- a/node_modules/echarts/lib/data/Source.js
+++ b/node_modules/echarts/lib/data/Source.js
@@ -252,7 +252,8 @@ function normalizeDimensionsOption(dimensionsDefine) {
     var item = {
       name: rawItem.name,
       displayName: rawItem.displayName,
-      type: rawItem.type
+      type: rawItem.type,
+      stack: rawItem.stack
     };
     // User can set null in dimensions.
     // We don't auto specify name, otherwise a given name may
diff --git a/node_modules/echarts/lib/data/helper/createDimensions.js b/node_modules/echarts/lib/data/helper/createDimensions.js
index 00d7eb7..dd514b1 100644
--- a/node_modules/echarts/lib/data/helper/createDimensions.js
+++ b/node_modules/echarts/lib/data/helper/createDimensions.js
@@ -110,6 +110,9 @@ source, opt) {
       }
       dimDefItem.type != null && (resultItem.type = dimDefItem.type);
       dimDefItem.displayName != null && (resultItem.displayName = dimDefItem.displayName);
+      if (dimDefItem.stack) {
+        resultItem.stack = true;
+      }
       var newIdx = resultList.length;
       indicesMap[dimIdx] = newIdx;
       resultItem.storeDimIndex = dimIdx;
diff --git a/node_modules/echarts/lib/data/helper/dataStackHelper.js b/node_modules/echarts/lib/data/helper/dataStackHelper.js
index c25de1b..ea8300d 100644
--- a/node_modules/echarts/lib/data/helper/dataStackHelper.js
+++ b/node_modules/echarts/lib/data/helper/dataStackHelper.js
@@ -91,7 +91,7 @@ export function enableDataStack(seriesModel, dimensionsInput, opt) {
     }
     if (mayStack && !dimensionInfo.isExtraCoord) {
       // Find the first ordinal dimension as the stackedByDimInfo.
-      if (!byIndex && !stackedByDimInfo && dimensionInfo.ordinalMeta) {
+      if (!byIndex && !stackedByDimInfo && (dimensionInfo.ordinalMeta || dimensionInfo.stack)) {
         stackedByDimInfo = dimensionInfo;
       }
       // Find the first stackable dimension as the stackedDimInfo.
diff --git a/node_modules/echarts/lib/scale/Interval.js b/node_modules/echarts/lib/scale/Interval.js
index 1094662..363c0a5 100644
--- a/node_modules/echarts/lib/scale/Interval.js
+++ b/node_modules/echarts/lib/scale/Interval.js
@@ -46,12 +46,17 @@ import * as numberUtil from '../util/number.js';
 import * as formatUtil from '../util/format.js';
 import Scale from './Scale.js';
 import * as helper from './helper.js';
+import { isFunction } from 'zrender/lib/core/util.js';
 var roundNumber = numberUtil.round;
 var IntervalScale = /** @class */function (_super) {
   __extends(IntervalScale, _super);
-  function IntervalScale() {
-    var _this = _super !== null && _super.apply(this, arguments) || this;
+  function IntervalScale(setting) {
+    var _this = _super.call(this, setting) || this;
     _this.type = 'interval';
+    var ticksGenerator = _this.getSetting('ticksGenerator');
+    if (isFunction(ticksGenerator)) {
+      _this._ticksGenerator = ticksGenerator;
+    }
     // Step is calculated in adjustExtent.
     _this._interval = 0;
     _this._intervalPrecision = 2;
@@ -104,7 +109,17 @@ var IntervalScale = /** @class */function (_super) {
     var extent = this._extent;
     var niceTickExtent = this._niceExtent;
     var intervalPrecision = this._intervalPrecision;
-    var ticks = [];
+    var ticksGenerator = this._ticksGenerator;
+    var ticks;
+    if (ticksGenerator) {
+      try {
+        ticks = ticksGenerator(extent, interval, niceTickExtent, intervalPrecision);
+        if (ticks) {
+          return ticks;
+        }
+      } catch (_e) {}
+    }
+    ticks = [];
     // If interval is 0, return [];
     if (!interval) {
       return ticks;
diff --git a/node_modules/echarts/types/dist/shared.d.ts b/node_modules/echarts/types/dist/shared.d.ts
index ca74097..ef41ce2 100644
--- a/node_modules/echarts/types/dist/shared.d.ts
+++ b/node_modules/echarts/types/dist/shared.d.ts
@@ -2422,6 +2422,9 @@ interface AxisBaseOptionCommon extends ComponentOption, AnimationOptionMixin {
         max: number;
     }) => ScaleDataValue);
 }
+
+declare type NumericAxisTicksGenerator = (extent?: number[], interval?: number, niceTickExtent?: number[], intervalPrecision?: number) => {value: number}[];
+
 interface NumericAxisBaseOptionCommon extends AxisBaseOptionCommon {
     boundaryGap?: [number | string, number | string];
     /**
@@ -2447,6 +2450,8 @@ interface NumericAxisBaseOptionCommon extends AxisBaseOptionCommon {
      * Will be ignored if interval is set.
      */
     alignTicks?: boolean;
+
+    ticksGenerator?: NumericAxisTicksGenerator;
 }
 interface CategoryAxisBaseOption extends AxisBaseOptionCommon {
     type?: 'category';
@@ -6412,6 +6417,7 @@ declare type DimensionDefinition = {
     type?: DataStoreDimensionType;
     name?: DimensionName;
     displayName?: string;
+    stack?: boolean;
 };
 declare type DimensionDefinitionLoose = DimensionDefinition['name'] | DimensionDefinition;
 declare const SOURCE_FORMAT_ORIGINAL: "original";
diff --git a/node_modules/echarts/types/src/coord/axisCommonTypes.d.ts b/node_modules/echarts/types/src/coord/axisCommonTypes.d.ts
index c5c2792..d524b70 100644
--- a/node_modules/echarts/types/src/coord/axisCommonTypes.d.ts
+++ b/node_modules/echarts/types/src/coord/axisCommonTypes.d.ts
@@ -56,6 +56,9 @@ export interface AxisBaseOptionCommon extends ComponentOption, AnimationOptionMi
         max: number;
     }) => ScaleDataValue);
 }
+
+export declare type NumericAxisTicksGenerator = (extent?: number[], interval?: number, niceTickExtent?: number[], intervalPrecision?: number) => {value: number}[];
+
 export interface NumericAxisBaseOptionCommon extends AxisBaseOptionCommon {
     boundaryGap?: [number | string, number | string];
     /**
@@ -81,6 +84,8 @@ export interface NumericAxisBaseOptionCommon extends AxisBaseOptionCommon {
      * Will be ignored if interval is set.
      */
     alignTicks?: boolean;
+    
+    ticksGenerator?: NumericAxisTicksGenerator;
 }
 export interface CategoryAxisBaseOption extends AxisBaseOptionCommon {
     type?: 'category';