object - Read For Learn

What is the JavaScript equivalent of var_dump or print_r in PHP?

Most modern browsers have a console in their developer tools, useful for this sort of debugging. Then you will get a nicely mapped out interface of the object/whatever in the console. Check out the console documentation for more details.

What is property in hasOwnProperty in JavaScript?

hasOwnProperty returns a boolean value indicating whether the object on which you are calling it has a property with the name of the argument. For example: However, it does not look at the prototype chain of the object. It’s useful to use it when you enumerate the properties of an object with the for…in construct. … Read more