Practical Tagged Template Use Cases
Build safe HTML and styled strings with tags.
Real-World Tags
Tagged templates power many libraries: HTML escaping, styled components, GraphQL queries, and i18n. The shared idea is intercepting interpolated values to process them safely.
function tag(s, ...v) { return s[0] + v[0] + s[1] }
console.log(tag(["<", ">"], "b"))The Escaping Problem
When you build HTML from user input, special characters like the less-than sign can inject markup. A tag function can escape these characters automatically in the interpolated values only.
const danger = "<script>"
console.log("raw: " + danger)All lessons in this course
- String Interpolation Basics
- Multiline Strings
- Tagged Template Functions
- Practical Tagged Template Use Cases