[echarts] line bar stack相互切换

 toolbox: {
        right: '10%',
        // 自定义工具提示框
        tooltip: {
            show: true,
            trigger: 'axis',
            formatter: function(param) {
                return "
" + param.title + '按钮' + "
";
},
},
// 隐藏工具标题
showTitle: false,
feature: {
magicType: {
type: ['line', 'bar','stack' ],
},
}
},