Call Polyfill

call-polyfill.js

Function.prototype.myCall = function(context, ...args) {
    context.fnName = this;
    context.fnName(...args);
}

/* Usage*/

function showProfileMessage(message) {
    console.log(message, this.name);
}
const obj = {
    name: "Abhinav Nigam"
};

showProfileMessage.myCall(obj, "welcome ");

it doesn't show welcome =)

Maybe it will be more correct:
Function.prototype.myCall = function(context, ...args) {
context.fnName = this;
context.fnName(...args);
}

Thanks @Volodymyrprodyus for pointing out. Updated the gist

fnName should be deleted after its execution as call doesn't edit the context we pass.