JSFiddle - React, Tailwind, and code Playground
JavaScript
var obj = [
{day:"monday", status:"present" , reason:""},
{day:"tuesday", status:"present" , reason:""},
{day:"wednesday", status:"absence" , reason:"sick"},
]
var tdays=0;
var pr=0;
var ab=0;
tdays=obj.length;
for(var i=0;i<obj.length;i++)
{
if(obj[i].status=='present')
pr++;
if(obj[i].status=='absence')
ab++;
}
document.write('Total days:'+tdays)
document.write('Present: '+pr)
document.write('Absence:'+ab)