const name = "Hemant";
const age = 30;
function highlight(strings, ...values){
let str = '';
strings.forEach((s, i)=> {
str += `${s} <span class="hl">${values[i] || ''}</span>`;
});
return str;
}
var str = highlight`my name is ${name} my age is ${age}`;
console.log(str)