lit-html

lit-html is a lightweight JavaScript library for writing HTML templates with embedded JavaScript expressions using tagged template literals. Developed by the Polymer team at Google, it provides efficient DOM rendering through fast template evaluation and surgical DOM updates. lit-html uses JavaScript's native template literal syntax, making templates feel like natural extensions of the language rather than a separate templating DSL. The library tracks which parts of templates are static and which are dynamic, updating only the dynamic portions when data changes for optimal performance. lit-html serves as the foundation for LitElement and the broader Lit library for building web components. It supports conditional rendering, list iteration, event binding, and attribute/property setting through simple JavaScript expressions within templates. The library is framework-agnostic and can be used standalone or integrated into larger applications, offering modern templating without the overhead of full frameworks like React or Vue.