Javascript determines whether objects are equal implementation code_javascript skills

When making a form page, I want to determine whether two js objects are exactly the same.
Here is the solution on stackoverflow, record it here.

Copy code The code is as follows:

Object.prototype.equals = function(x)
{
var p;
for(p in this) {
if(typeof(x[p])=='undefined') {return false;}
}
for( p in this) {
if (this[p]) {
switch(typeof(this[p])) {
case 'object':
if (!this[p].equals (x[p])) { return false; } break;
case 'function':
if (typeof(x[p])=='undefined' ||
(p != 'equals ' && this[p].toString() != x[p].toString()))
return false;
break;
default:
if (this[p] != x [p]) { return false; }
}
} else {
if (x[p])
return false;
}
}
for(p in x) {
if(typeof(this[p])=='undefined') {return false;}
}
return true;
}