postCssAstToCssAst() — tailwindcss Function Reference

Architecture documentation for the postCssAstToCssAst() function in ast.ts from the tailwindcss codebase.

Function typescript ToolingIntegrations VitePlugin calls 5 called by 2

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ToolingIntegrations→ VitePlugin→ postCssAstToCssAst() — tailwindcss Function Reference

Dependency Diagram

graph TD
  c90ec073_0241_abd8_3427_8edf14bd20d2["postCssAstToCssAst()"]
  f3a29437_b991_0a27_2561_a76b3f340642["tailwindcss()"]
  f3a29437_b991_0a27_2561_a76b3f340642 -->|calls| c90ec073_0241_abd8_3427_8edf14bd20d2
  48809bde_54f2_e8e3_6b2c_2861fdc49d90["compiler()"]
  48809bde_54f2_e8e3_6b2c_2861fdc49d90 -->|calls| c90ec073_0241_abd8_3427_8edf14bd20d2
  4cd99e59_ac1e_2a1f_0946_33cc1afd2532["get()"]
  c90ec073_0241_abd8_3427_8edf14bd20d2 -->|calls| 4cd99e59_ac1e_2a1f_0946_33cc1afd2532
  85b46de2_edfa_9371_e2c6_e60f3f5346a2["decl()"]
  c90ec073_0241_abd8_3427_8edf14bd20d2 -->|calls| 85b46de2_edfa_9371_e2c6_e60f3f5346a2
  08f33202_11d1_569a_e8df_de23eb987e2f["rule()"]
  c90ec073_0241_abd8_3427_8edf14bd20d2 -->|calls| 08f33202_11d1_569a_e8df_de23eb987e2f
  a9af385a_fd12_f1d8_7cf0_ccb9b281ca18["atRule()"]
  c90ec073_0241_abd8_3427_8edf14bd20d2 -->|calls| a9af385a_fd12_f1d8_7cf0_ccb9b281ca18
  dbaac8a3_b27b_2942_9a4d_7e9063a9649d["comment()"]
  c90ec073_0241_abd8_3427_8edf14bd20d2 -->|calls| dbaac8a3_b27b_2942_9a4d_7e9063a9649d
  style c90ec073_0241_abd8_3427_8edf14bd20d2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/@tailwindcss-postcss/src/ast.ts lines 126–189

export function postCssAstToCssAst(root: postcss.Root): AstNode[] {
  let inputMap = new DefaultMap<postcss.Input, Source>((input) => ({
    file: input.file ?? input.id ?? null,
    code: input.css,
  }))

  function toSource(node: postcss.ChildNode): SourceLocation | undefined {
    let source = node.source
    if (!source) return

    let input = source.input
    if (!input) return
    if (source.start === undefined) return
    if (source.end === undefined) return

    return [inputMap.get(input), source.start.offset, source.end.offset]
  }

  function transform(
    node: postcss.ChildNode,
    parent: Extract<AstNode, { nodes: AstNode[] }>['nodes'],
  ) {
    // Declaration
    if (node.type === 'decl') {
      let astNode = decl(node.prop, node.value, node.important)
      astNode.src = toSource(node)
      parent.push(astNode)
    }

    // Rule
    else if (node.type === 'rule') {
      let astNode = rule(node.selector)
      astNode.src = toSource(node)
      node.each((child) => transform(child, astNode.nodes))
      parent.push(astNode)
    }

    // AtRule
    else if (node.type === 'atrule') {
      let astNode = atRule(`@${node.name}`, node.params)
      astNode.src = toSource(node)
      node.each((child) => transform(child, astNode.nodes))
      parent.push(astNode)
    }

    // Comment
    else if (node.type === 'comment') {
      if (node.text.charCodeAt(0) !== EXCLAMATION_MARK) return
      let astNode = comment(node.text)
      astNode.src = toSource(node)
      parent.push(astNode)
    }

    // Unknown
    else {
      node satisfies never
    }
  }

  let ast: AstNode[] = []
  root.each((node) => transform(node, ast))

  return ast
}