Object-Oriented JavaScript — Strings

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JavaScript is partly an object-oriented language.

To learn JavaScript, we got to learn the object-oriented parts of JavaScript.

In this article, we’ll look at strings, which is one of the building blocks of objects.

Strings

A string is a sequence of characters to represent text.

Any values placed between single quotes, double quotes, or backticks are string.

If we have:

let s = "foo";
typeof s;

Then typeof s returns 'string' .

If we put nothing between the quotes, it’s still a string.

The + operator is used to concatenate 2 strings.

If we have:

let s1 = "web";
let s2 = "site";
let s = s1 + s2;

Then we s is 'website' .

And typeof s would be 'string' .

This is a source of errors in the system.

To avoid errors, we should make sure that operators are strings.

This way, we won’t be adding anything by accident.

String Conversions

A string is converted to a number behind the scene if a number string is encountered.