Q: What is a difference between call,apply and bind in JavaScript?

Answer:

• All three call,apply and bind are prototype methods of function that means you can execute these methods on any function.
• All three methods are used to execute the function in explicit context where this keyword refers to the first argument passed in method.
• call() - accepts the function arguments as comma separated values arg1,arg2
  functionName.call(thisArg,arg1,arg2,...)
• apply() - accepts the function arguments as array of values[arg1,arg2..]
  functionName.apply(this.Arg, [arg1,arg2,..])
• bind() - returns a new bounded function which can be executed later.
  functionName.bind(thisArg)
• call() and apply() methods are executed immediately whereas bind() method return a new bounded function which can be executed later.