javascript - Where can I place prototype property as per my below code? -

this question has answer here:

• assigning prototype methods *inside* constructor function - why not? 6 answers

i have writtern 2 different ways , both giving me same result , can use when ?

first example

var basecls = function() {   basecls.prototype.name = "john"; }; var justcls = new basecls(); console.log(justcls.name); // giving result john 

second example

var basecls = function() {}; basecls.prototype.name = "john"; var justcls = new basecls(); console.log(justcls.name); // giving result john 

both giving me same result want know there other criteria lead write property / method prototype inside / outside main function ?

thanks consideration

you should change prototype outside constructor. otherwise change every time create instance.