Can't show on el-dialog by Element-UI

Hi guys:
I don’t know why can’t show on el-dialog.
If I don’t use el-dialog I can get this.

This is my sample code, xmlStr has been successfully loaded, but there is nothing on the web page.


It’s my solution, add the $nextTick(()=>{})

                const canvas = this.$refs.canvas
                _this.xmlData = xmlStr
                    _this.bpmnView = new BpmnViewer({
                        container: canvas
                    _this.bpmnModel = new BpmnModeler({
                        moddleExtensions: {

For further assistance, please share a CodeSandbox that reproduces your issue in a way that we can inspect it.

Oh!! I forget,thanks for your reminder