//app.js app.get（“/history/：countryname”），异步（req，res）=>{

const global = await api.all();
const updated = global.updated;
const updatedFormat = new Date(updated).toLocaleString('en-US', {timeZoneName: "short"});
let countryName = _.lowerCase(req.params.countryName);
 countryName = countryName.toString();
const history = await api.historical.countries({country:'China' , days: '10'});
const historyCases = history.timeline.cases;
const historyDeaths = history.timeline.deaths;
const historyRecovered = history.timeline.recovered;

for (var i in historyCases){
    caseLabel.push(i);
    caseData.push(historyCases[i]);
}
for (var i in historyDeaths){
    deathData.push(historyDeaths[i]);
}
for (var i in historyRecovered){
    recoveredData.push(historyRecovered[i]);
}
let  formattedCountry = countryName.toUpperCase(); 
res.render("country", {caseData, deathData, recoveredData, caseLabel, updatedFormat, formattedCountry} );

caseData = [];
deathData = [];
recoveredData = [];
caseLabel = [];

})
//country.ejs
在此处输入代码'var ctx=document.getelementbyid（'mychart'）.getcontext（'2d'）；var mychart=new chart（ctx，{type:'line'，data:{label:labels，dataset:[{label:'cases'，data:casedata，backgroundcolor:'rgba（255，255，255,0.2）”，bordercolor:'4c92bb'，borderwidth:2}，{label:'deaths'，data:deathdata backgroundcolor:'rgba（255，255，255,0.2'），bordercolor:'de354c'，borderwidth:'2}，{label:'recovered'，数据：recovereddata，backgroundcolor:'rgba（255，255，255，0.2'），bordercolor:'#deb135'，borderwidth:2}]}，}；