cannot define xScaleMin of Line charts

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Current behavior I want to define xScaleMin & xScaleMax of a Line charts Graph but I get this error on console :

I even did an update to the latest version of ngx charts

@swimlane/ngx-charts@6.0.2 updated 1 package in 24.807s

Expected behavior

I want to Create a Line chart graph to display Daily stats for each hour so I want to define a xMin & xMax ( xMin is 00:00 (midnight ) to xMax is 23:00 (today ) Reproduction of the problem

<ngx-charts-line-chart
        [view]="view"
        [scheme]="colorScheme"
        [results]="multi"
        [gradient]="gradient"
        [xAxis]="showXAxis"
        [yAxis]="showYAxis"
        [legend]="showLegend"
        [showXAxisLabel]="showXAxisLabel"
        [showYAxisLabel]="showYAxisLabel"
        [xAxisLabel]="xAxisLabel"
        [yAxisLabel]="yAxisLabel"
        [autoScale]="autoScale"
        (select)="onSelect($event)"
        [referenceLines]="referenceLines"
        [showRefLines]=true
        [xScaleMin]="xScaleMin">
</ngx-charts-line-chart>

as for xScaleMin = moment().endOf('day').toDate();

(this is returning correct value which I could see in my console )

What is the motivation / use case for changing the behavior?

Please tell us about your environment: Operating system: Ubuntu 16.4 LTS, IDE : Webstorm , package manager : NPM

ngx-charts version: x.x.x latest 6.0
Angular version: x.x.x 4.4.4
Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
Language: [all | TypeScript X.X | ES6/7 | ES5]

swimlane / ngx-charts

cannot define xScaleMin of Line charts #815