extractEventNames() — vue Function Reference

Architecture documentation for the extractEventNames() function in compileScript.ts from the vue codebase.

Function typescript SfcCompiler ScriptCompiler called by 1

Entity Profile

SfcCompiler→ ScriptCompiler→ extractEventNames() — vue Function Reference

Dependency Diagram

graph TD
  ee433162_8cd6_89a6_0e46_2ee566037272["extractEventNames()"]
  c9346cac_54e3_f6ca_68a7_03c6e82c9609["compileScript.ts"]
  ee433162_8cd6_89a6_0e46_2ee566037272 -->|defined in| c9346cac_54e3_f6ca_68a7_03c6e82c9609
  813ba817_060e_f16f_ab4c_2fd4225691a8["extractRuntimeEmits()"]
  813ba817_060e_f16f_ab4c_2fd4225691a8 -->|calls| ee433162_8cd6_89a6_0e46_2ee566037272
  style ee433162_8cd6_89a6_0e46_2ee566037272 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/compiler-sfc/src/compileScript.ts lines 1577–1606

function extractEventNames(
  eventName: ArrayPattern | Identifier | ObjectPattern | RestElement,
  emits: Set<string>
) {
  if (
    eventName.type === 'Identifier' &&
    eventName.typeAnnotation &&
    eventName.typeAnnotation.type === 'TSTypeAnnotation'
  ) {
    const typeNode = eventName.typeAnnotation.typeAnnotation
    if (typeNode.type === 'TSLiteralType') {
      if (
        typeNode.literal.type !== 'UnaryExpression' &&
        typeNode.literal.type !== 'TemplateLiteral'
      ) {
        emits.add(String(typeNode.literal.value))
      }
    } else if (typeNode.type === 'TSUnionType') {
      for (const t of typeNode.types) {
        if (
          t.type === 'TSLiteralType' &&
          t.literal.type !== 'UnaryExpression' &&
          t.literal.type !== 'TemplateLiteral'
        ) {
          emits.add(String(t.literal.value))
        }
      }
    }
  }
}