import css = require("css"); // Check that user can parse, modify and persist CSS content var parserOptions: css.ParserOptions; parserOptions = { silent: true, source: "test.css" }; var stylesheet = css.parse("body { font-size: 12px; }", parserOptions); var comment: css.Comment; comment = { type: "comment", comment: "Hello World" }; stylesheet.stylesheet.rules.push(comment); var stringifyOptions: css.StringifyOptions; stringifyOptions = { indent: " " }; var content = css.stringify(stylesheet, stringifyOptions); // Create new stylesheet and save it var bgDeclaration: css.Declaration = { type: "declaration", property: "background", value: "#eee" }; var colorDeclaration: css.Declaration = { type: "declaration", property: "color", value: "#888" }; var ruleComment: css.Comment = { type: "comment", comment: "New CSS AST Tree Rule" }; var bodyRule: css.Rule = { type: "rule", selectors: ["body"], declarations: [ruleComment, bgDeclaration, colorDeclaration] }; var newStylesheet: css.Stylesheet = { type: "stylesheet", stylesheet: { rules: [bodyRule] } }; content = css.stringify(newStylesheet);