In Node.JS, I'm trying to "reload" a file. I have the following code:
delete require.cache[require.resolve("./pathToFile/" + restartModule)]
with restartModule being the file name, but I'm not sure how I could add the file back using require() and define it as the variable restartModule. For example, if restartModule is myModule, how would I add myModule.js into the var called myModule? Or maybe there's an easier way to simply "reload" a file in the cache?
You could do something simple enough like this:
function reloadModule(moduleName){
delete require.cache[require.resolve(moduleName)]
console.log('reloadModule: Reloading ' + moduleName + "...");
return require(moduleName)
}
var restartModule= reloadModule('./restartModule.js');
You would have to call reloadModule every time you want to reload the source though. You could simplify by wrapping like:
var getRestartModule = function() {
return reloadModule('./restartModule.js');
}
getRestartModule().doStuff();
Or
var reloadModules = function() {
return {
restartModule = reloadModule('./restartModule.js');
};
}
var modules = reloadModules();
modules.restartModule.doStuff();
Or:
var reloadModules = function(moduleList) {
var result = {};
moduleList.forEach((module) => {
result[module.name] = reloadModule(module.path);
});
}
var modules = reloadModules([{name: 'restartModule', path: './restartModule.js'}]);
modules.restartModule.doStuff();
You could even put the module reload on a setInterval so modules would get loaded every N seconds.
Then there's always nodemon: https://nodemon.io/ this is useful in development, whenever a source file changes it will reload your server. You just use it like node, e.g.
nodemon server.js
