art-template is a simple and superfast templating engine that optimizes template rendering speed by scope pre-declared technique, hence achieving runtime performance which is close to the limits of JavaScript. At the same time, it supports both NodeJS and browser. art-template simultaneously supports two syntax of template. Standard syntax allows templates to be easier to read and write. While original syntax has powerful logical processing ability. Original syntax is compatible with EJS, Underscore, LoDash templates. Performance is close to the JavaScript rendering limits. Debugging friendly. Syntax errors or runtime errors will be positioned accurately at which line of template. Support setting breakpoint in templating files (Webpack Loader). Supports Express, Koa, Webpack. Supports template inheritance and sub template. Browser version is only 6KB. Standard syntax supports basic templating syntax and JavaScript expression.