我正在尝试使用电子库实现暂停和恢复功能。我怎么能调用item.pause out of session.on（'will-download'）因为它是session.on（'will-download'）中的item的功能，还是来自任何其他方式？
var url, path, filename;
ipcMain.on(‘item:file’, function(e, file) {
if(file.msg === ‘d’){
console.log(file);
url = file.url;
path = pathLib.join(__dirname, file.path);
filename = file.filename;
contents.downloadURL(url);
}
if(file.msg === ‘p’){
item.pause();
}
if(file.msg === ‘r’){
item.resume();
}
contents.session.on('will-download', (event, item, contents) => {
// Set the save path, making Electron not to prompt a save dialog.
path = `${path}${filename}`;
item.setSavePath(path);
item.on('updated', (event, state) => {
if (state === 'interrupted') {
console.log('Download is interrupted but can be resumed');
} else if (state === 'progressing') {
if (item.isPaused()) {
console.log('Download is paused');
} else {
console.log(`Received bytes: ${item.getReceivedBytes()} out of ${item.getTotalBytes()}`);
var percentage = (item.getReceivedBytes()/item.getTotalBytes())*100;
var progress = {'rBytes':item.getReceivedBytes(), 'tBytes':item.getTotalBytes(), 'p':percentage};
contents.send('item:progress', progress);
}
}
});
item.once('done', (event, state) => {
if (state === 'completed') {
console.log('Download successfully');
} else {
console.log(`Download failed: ${state}`);
}
});
});
});