[ { name: 'Rahul Patel' }, { name: 'Karan Patel' }, { name: 'Shubham Tayal' }, { name: 'rahul patel' }, { name: 'Prakash shah' } ]No soy desarrollador de javascript, pero tal vez algo como esto:
employes.forEach(element => element.name = element.name.toUpperCase()); const employes=[{name:'Rahul Patel'},{name:'Karan Patel'},{name:'Shubham Tayal'},{name:'rahul patel'},{name:'Prakash shah'}] const toUpper = employes.map(o => ({ name: o.name.toUpperCase() })); console.log(toUpper);