📝 for makeSingleInstance
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@ -290,6 +290,51 @@ URLs that fall under "Local Intranet" sites (i.e. are in the same domain as you)
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However, this detection often fails when corporate networks are badly configured,
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so this lets you co-opt this behavior and enable it for all URLs.
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### `app.makeSingleInstance(callback)`
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* `callback` Function
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This method makes your application a Single Instance Application - instead of
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allowing multiple instances of your app to run, this will ensure that only a
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single instance of your app is running, and other instances signal this
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instance and exit.
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`callback` is called when a second instance has been executed, and provides
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the command-line (including Chromium flags) and the working directory of the
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secondary instance. Usually applications respond to this by making their
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primary window focused and non-minimized.
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`callback` should return `true` if the message was successfully handled, or
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`false` if the secondary process should retry sending it or it failed.
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```js
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app.on('ready', function() {
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var myWindow;
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var shouldQuit = app.makeSingleInstance(function(command_line, working_directory) {
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// Someone tried to run a second instance, we should focus our window
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if (myWindow) {
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if (myWindow.isMinimized()) myWindow.restore();
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myWindow.focus();
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}
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// We successfully handled the command line
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return true;
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});
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if (shouldQuit) {
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app.quit();
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return;
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}
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// Create myWindow, load the rest of the app, etc...
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});
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```
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Returns a Boolean - if `false`, your process is the primary instance of the
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application and your app should continue loading. If `true`, your process has
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sent its parameters to another instance, and you should immediately quit.
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### `app.commandLine.appendSwitch(switch[, value])`
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Append a switch (with optional `value`) to Chromium's command line.
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