Template Literals

Nested template interpolation is the technique of using expressions inside template literals that themselves contain template literals. Since the ${} syntax can contain any valid JavaScript expression, it's perfectly valid to include another template literal within it. For example: ``The result is ${`${x} + ${y} = ${x + y}`}``. This nesting allows for powerful string composition where sub-templates can be conditionally included or modified before being incorporated into the main template. This technique is useful for complex string generation scenarios, such as when building HTML with dynamic parts that themselves contain dynamic content, or when implementing localization systems where placeholders might need further processing.