angular.js - angularjs directive + D3, scope数据更新后，重新生成可视化图后新图直接覆盖在老图之上

Question

加了transclude，应该把template里的内容清空的,但是每次update数据后原来的图都在，哪里写错了吗，跟有关吗？

directive

myApp.directive('sankeyChart', function($window){
    return{
        restrict:'EA',
        transclude: true, //加了transclue
        template:"<svg width='1200' height='600'></svg>",
        scope:{chartData:'=chartData'},
        link: function(scope, elem, attrs){
            scope.$watch('chartData', function(nv){
                var dataToPlot=nv;
                var d3 = $window.d3;
                、、、、下面都是d3的代码、、、、、、、

调用directive

<p sankey-chart chart-data="sankeyData" ng-if="sankeyData" class="myCharts"></p>

如下图：

Answer 1

Erase, I found the problem. Transclude cannot erase the contents of the svg generated by d3. I manually add a code to clear the contents of the svg before writing the d3 code - it's done.

svg.selectAll('*').remove();