Electron setTimeout returns renderer 进程中的数字而不是 Timeout 对象

Question

我注意到 在 Electron 的渲染器进程中，setTimeout 节点函数 returns 一个 number （整数）而不是一个Timeout对象。

在主进程中，它returns预期的Timeout对象

我使用最新版本（即 4.0.5）。

.

渲染进程的控制台：

主进程的控制台：

npm start

> electron-timer-bug@0.0.1 start /home/doom/Documents/projets/testElectron/electron-timer-bug
> electron .

/home/doom/Documents/projets/testElectron/electron-timer-bug/node_modules/electron/dist/electron: /lib/x86_64-linux-gnu/libdbus-1.so.3: no version information available (required by /home/doom/Documents/projets/testElectron/electron-timer-bug/node_modules/electron/dist/electron)
/home/doom/Documents/projets/testElectron/electron-timer-bug/node_modules/electron/dist/electron: /lib/x86_64-linux-gnu/libdbus-1.so.3: no version information available (required by /home/doom/Documents/projets/testElectron/electron-timer-bug/node_modules/electron/dist/electron)
Fontconfig warning: "/etc/fonts/fonts.conf", line 86: unknown element "blank"
mainWatchdog :  Timeout {
  _called: false,
  _idleTimeout: 1000,
  _idlePrev:
   TimersList {
     _idleNext: [Circular],
     _idlePrev: [Circular],
     _unrefed: false,
     msecs: 1000,
     _timer: Timer { _list: [Circular] } },
  _idleNext:
   TimersList {
     _idleNext: [Circular],
     _idlePrev: [Circular],
     _unrefed: false,
     msecs: 1000,
     _timer: Timer { _list: [Circular] } },
  _idleStart: 648,
  _onTimeout: [Function],
  _timerArgs: undefined,
  _repeat: null,
  _destroyed: false,
  [Symbol(unrefed)]: false,
  [Symbol(asyncId)]: 7,
  [Symbol(triggerId)]: 5 }
typeof(mainWatchdog) :  object
mainWatchdog.constructor.name:  Timeout
main callback

有无nodeIntegration都一样

这是测试仓库：https://gitlab.com/doom-fr/electron-timer-bug

正常吗？怎么了？

厄运

Answer 1

在 渲染器进程 中，setTimeout() or window.setTimeout() 是一个 Web API 函数，其中 returns 一个整数：

Return value

The returned timeoutID is a positive integer value which identifies the timer created by the call to setTimeout(); this value can be passed to clearTimeout() to cancel the timeout.

而在主进程、setTimeout() is a Node.js global object method (described in Timers) which returns a Timeout对象中：

setTimeout(callback, delay[, ...args])

callback The function to call when the timer elapses.

delay The number of milliseconds to wait before calling the callback.

...args Optional arguments to pass when the callback is called.

Returns: <Timeout> for use with clearTimeout()

为了从 渲染器进程 调用 Node.js 方法，您必须使用 Electron 的远程 getGlobal 方法；例如：

require('electron').remote.getGlobal('setTimeout')(() => { console.log('done'); }, 2000);

Electron setTimeout returns renderer 进程中的数字而不是 Timeout 对象

Electron setTimeout returns number in renderer process instead of Timeout object

javascript

settimeout

node.js

electron