Source symbols: packages/playwright-core/src/client/eventEmitter.ts

Deterministic, value-free symbol metadata extracted from public source. Implementations and literal values are not copied into this page.

• Revision: main@4cd8608744bf4d18c9f23578c3cf4a1cd1862b2d · 2026-07-20T11:02:36Z
• Declarations: 33
• Referenced calls: 52

Declared symbols

• EventType — type at line 31
• Listener — type at line 32
• EventMap — type at line 33
• EventEmitter — exported class at line 35; references constructor, getPrototypeOf, create, setMaxListeners, isNaN, RangeError, getMaxListeners, emit, _callHandler, slice, for, apply, get, Set, set, add, _rejectionHandler, delete, addListener, _addListener
• events — const at line 65; references _callHandler, slice, for
• handler — const at line 69; references _callHandler, slice, for
• len — const at line 76; references slice, for, _callHandler, apply, get, Set, set, add, _rejectionHandler, delete
• listeners — const at line 77; references slice, for, _callHandler, apply, get, Set, set, add, _rejectionHandler, delete
• promise — const at line 85; references apply, get, Set, set
• set — let at line 88; references get, Set
• events — let at line 112; references create, emit, unwrapListener
• existing — let at line 113; references create, emit, unwrapListener
• m — const at line 147; references getMaxListeners, Error, String, isUnderTest, warn
• w — const at line 151; references Error, String, isUnderTest, warn
• events — const at line 188; references create, emit, for, wrappedListener, shift, splice
• list — const at line 192; references create, emit, for, wrappedListener, shift, splice
• position — let at line 205; references for, wrappedListener
• originalListener — let at line 206; references for, wrappedListener
• errors — const at line 247; references push, _waitFor
• events — const at line 262; references create
• keys — const at line 282; references for, _removeAllListeners
• key — let at line 283; references for, _removeAllListeners
• listeners — const at line 296; references removeListener, for
• events — const at line 316
• listener — const at line 318; references eventNames, ownKeys
• promises — let at line 332; references get, for, push
• events — const at line 344; references unwrapListener, unwrapListeners, slice, TypeError
• listener — const at line 349; references unwrapListener, unwrapListeners, slice, TypeError
• checkListener — function at line 360; references TypeError
• OnceWrapper — class at line 365; references constructor, bind, _handle, removeListener, apply
• unwrapListener — function at line 389; references wrappedListener
• unwrapListeners — function at line 393; references wrappedListener
• wrappedListener — function at line 397

Imported modules

• events
• @utils/debug

File-level call references

• constructor — line 43
• getPrototypeOf — line 44
• create — line 45
• setMaxListeners — line 53
• isNaN — line 54
• RangeError — line 55
• getMaxListeners — line 60
• emit — line 64
• _callHandler — line 74
• slice — line 77
• for — line 78
• apply — line 85
• get — line 88
• Set — line 90
• set — line 91
• add — line 93
• _rejectionHandler — line 96
• delete — line 99
• addListener — line 102
• _addListener — line 103
• checkListener — line 111
• unwrapListener — line 121
• unshift — line 141
• push — line 143
• Error — line 151
• String — line 152
• isUnderTest — line 159
• warn — line 161
• prependListener — line 169
• once — line 173
• OnceWrapper — line 175
• prependOnceListener — line 179
• removeListener — line 185
• wrappedListener — line 209
• shift — line 220
• splice — line 222
• off — line 235
• removeAllListeners — line 239
• _removeAllListeners — line 242
• _waitFor — line 249
• resolve — line 258
• listeners — line 307
• _listeners — line 308
• rawListeners — line 311
• listenerCount — line 315
• eventNames — line 327
• ownKeys — line 328
• all — line 340
• unwrapListeners — line 356
• TypeError — line 362
• bind — line 376
• _handle — line 380

Source: packages/playwright-core/src/client/eventEmitter.ts