JavaScript me new ke bare me

Dear Sir/Madam,
JavaScript me class abc() ye banane par hamne kuch nhi kiya aur neeche me new naam ka object banaya par usme kya hua mujhe kuch samajh nahi aaya bas main itna samja ki new object create hua par kaha vo mujhe nahi maloom. Please Solve my doubt.

JavaScript ke Special Operators ke topic me…
Please solve my doubt.
Thank You,