Table of Contents
What is JavaScript deep dive?
In JavaScript, functions are objects, so we can use them as we would use any other datatype. We can store a function into a variable, objects, or an array. Functions can be passed as arguments to another function. Functions can be returned from a function and so on.
What is a function JavaScript?
A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and return an output where there is some obvious relationship between the input and the output.
What are the four types of JavaScript objects?
In JavaScript, almost “everything” is an object.
- Booleans can be objects (if defined with the new keyword)
- Numbers can be objects (if defined with the new keyword)
- Strings can be objects (if defined with the new keyword)
- Dates are always objects.
- Maths are always objects.
- Regular expressions are always objects.
How we can create object in JavaScript?
To create an object, use the new keyword with Object() constructor, like this: const person = new Object(); Now, to add properties to this object, we have to do something like this: person.
How many keywords are there in JavaScript?
JavaScript Keywords | Know List Of Top 49 JavaScript Keywords.
How many types of JavaScript are there?
JavaScript has six primitives types: string , number , undefined , null , boolean , and symbol . There is also a compound type or object . Interestingly, the primitive types are immutable and don’t have properties.
How many ways we can create object in JavaScript?
four ways
There are four ways to create an object in JavaScript – using object literals, using the function constructor, using the Object. create method, and using the class keyword (which is almost the same as using a function constructor).
What is object object in JavaScript?
What is JavaScript [object Object]? [object Object] is a string version of an object instance. This value is returned by a JavaScript program if you try to print out an object without first formatting the object as a string.
What are object methods in JavaScript?
JavaScript methods are actions that can be performed on objects. A JavaScript method is a property containing a function definition. Methods are functions stored as object properties.
What is debugger in JavaScript?
The debugger keyword is used in the code to force stop the execution of the code at a breaking point and calls the debugging function. The debugger function is executed if any debugging is needed at all else no action is performed.