Execute code when the js-process exits. On all javascript-environments
npm install unloadRun a piece of code whenever the javascript process stops/exits/quits. On browsers, nodejs, electron, react-native, workers, iframes. It also ensures that the exit-function is called only once.
You should use this module when your write a npm library where you dont know in which environments the users will run it.
unload handle?When nodejs:
``js`
process.on('beforeExit');
process.on('exit');
process.on('SIGINT'); // catches ctrl+c event
process.on('uncaughtException'); // catches uncaught exceptions
When browser:
`js`
window.addEventListener('beforeunload'); // closing of normal browser-window
window.addEventListener('unload'); // closed inside of iframe
Installation:
npm install unload --save
Add a function which runs when the process exits:
`javascript`
var unload = require('unload');
unload.add(function(){
console.log('Ouch, I\'m dying.');
});
Add and remove the function (It will no longer run when the process exits):
`javascript
var unload = require('unload');
var ret = unload.add(function(){
console.log('Ouch, I\'m dying.');
});
ret.remove(); // removes the event-handler
`
Run all previously added functions:
`javascript
var unload = require('unload');
unload.add(function(){
console.log('Ouch, I\'m dying.');
});
unload.runAll();
`
Remove all added functions (They will no longer run when the process exits):
`javascript
var unload = require('unload');
unload.add(function(){
console.log('Ouch, I\'m dying.');
});
unload.removeAll();
``