Because strings must be written within quotes, JavaScript will misunderstand this string: let text = "We are the so-called "Vikings" from the north."; The string will be chopped to "We are the so-called ".

Apr 10, 2025 · Strings are useful for holding data that can be represented in text form. Some of the most-used operations on strings are to check their length, to build and concatenate them using the + and += string operators, checking for the existence or location of substrings with the indexOf() method, or extracting substrings with the substring() method.

Apr 3, 2025 · Symbol is a built-in object whose constructor returns a symbol primitive — also called a Symbol value or just a Symbol — that's guaranteed to be unique.

Mar 7, 2016 · You're talking about template literals, which use backquotes (`), as opposed to conventional quotation marks. They allow for both multiline strings and string interpolation. Multiline strings: String interpolation: You can have expressions within the …

Feb 12, 2014 · Symbols are a new primitive, just like the number, string, and boolean primitives. Unlike the other primitives, symbols do not have a literal syntax (e.g. how string has '') — the only way to create them is with the Symbol constructor in the following way: let symbol = Symbol();

Symbols are immutable (cannot be changed) and are unique. For example, const value2 = Symbol('hello'); console.log(value1 === value2); // false. Though value1 and value2 both contain the same description, they are different. You use the Symbol() function to create a Symbol. For example, typeof x; // symbol.

Mar 5, 2019 · Symbols, the newest JavaScript primitive, bring a few benefits to the language and are particularly useful when used as object properties. But, what can they do for us that strings cannot?

Jun 27, 2022 · JavaScript symbols are different. So, to summarize, a symbol is a “primitive unique value” with an optional description. Let’s see where we can use them. Most values in JavaScript support implicit conversion to a string. For instance, we can alert almost any value, and it will work. Symbols are special. They don’t auto-convert.

Jul 24, 2018 · Why it is needed to use Symbol.for () instead of using plain string? UPD. I suddenly invented the most useful feature of Symbol.for() call. If there is using symbols in your code sometimes it is difficult to use conditional breakpoints while debugging.

Jan 17, 2024 · In JavaScript, the textual data is stored as strings. There is no separate type for a single character. The internal format for strings is always UTF-16 , it is not tied to the page encoding.