once() — vue Function Reference

Architecture documentation for the once() function in util.ts from the vue codebase.

Function typescript VueCore VDom

Entity Profile

VueCore→ VDom→ once() — vue Function Reference

Dependency Diagram

graph TD
  ddc5a12a_b988_e466_6428_b11bcb71f830["once()"]
  b7977953_caa1_d867_207c_74cfbf6421e0["util.ts"]
  ddc5a12a_b988_e466_6428_b11bcb71f830 -->|defined in| b7977953_caa1_d867_207c_74cfbf6421e0
  style ddc5a12a_b988_e466_6428_b11bcb71f830 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/shared/util.ts lines 361–369

export function once<T extends (...args: any[]) => any>(fn: T): T {
  let called = false
  return function () {
    if (!called) {
      called = true
      fn.apply(this, arguments as any)
    }
  } as any
}