Template literals are literals delimited with backtick (`) characters, allowing for multi-line strings, string interpolation with embedded expressions, and special constructs called tagged templates.

The JavaScript exception "invalid range in character class" occurs when a character class in a regular expression uses a range, but the start of the range is greater than the end.

# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/svg/reference/element/switch/index.md # Original Wiki contributors escattone Tigt hinell jwhitlock fscho...

The JavaScript exception "reference to undeclared private field or method #x" occurs when a private name is used, but this private name is not declared in the class scope.

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The JavaScript exception "Unexpected '#' used outside of class body" occurs when a hash ("#") is encountered in an unexpected context, most notably outside of a class declaration. Hashes are valid at the beginning of a file as a hashbang comment, or inside of a class as part of a private field. You may encounter this error if you forget the quotation marks when trying to access a DOM identifier as well.

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The JavaScript exception "more arguments needed" occurs when there is an error with how a function is called. More arguments need to be provided.

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The JavaScript exception "is not iterable" occurs when the value which is spread into an array or function call, given as the right-hand side of for...of, as argument of a function such as Promise.all or Set(), or as the right-hand side of an array destructuring, is not an iterable object. This error is also encountered when Array.fromAsync() or for await...of is used with a non-async iterable.