Tagged Template Literals: Building Mini-DSLs in JavaScript

Tagged template literals are syntactic sugar for function calls that receive template pieces as arguments, where tagtext ${value} desugars to tag([“text “, “”], value) and can return any data type. The article demonstrates safe HTML tags that prevent XSS, parameterized SQL tags that resist injection, and how libraries like styled-components and graphql-tag use the feature, while noting that real grammar rules or recursion call for dedicated parser tools instead.