blocks|key|1142467|text|require-uncached是一个npm模块，它将清除缓存并每次从源加载一个模块，根据标题，这正是您感兴趣的地方。要使用此代码，只需使用以下代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1142468|const+requireUncached+=+require('require-uncached');
requireUncached('./app.js');|code-block|syntax|javascript|1142469|在这样做之前，可能需要确保停止所有以前的app.js代码(包括快速服务器)，这样它们就不会在同一个端口上发生冲突。|1142470|此外，我建议考虑这种方法是否真的是最好的解决方案--我确信像pm2这样的库可以处理停止和重新启动节点实例，而不会出现不必要的数据，这可能会导致内存泄漏。|1142471|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/require-uncached|1|https://www.npmjs.com/package/pm2^0|0|G|0|G|0|0|0|K|6|0|U|3|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|18|8|@]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|O|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]]]

<a href="https://www.npmjs.com/package/require-uncached" rel="noreferrer"><code>require-uncached</code></a> is an npm module that will clear the cache and load a module from source fresh each time, which is exactly what you seem to be interested in according to your title. To use this, you can simply use the following code:

<pre><code>const requireUncached = require('require-uncached');
requireUncached('./app.js');
</code></pre>

Before doing this, it's probably necessary to ensure that all of the previous <code>app.js</code>'s code (including the Express server) is stopped so that they don't conflict for the same port.

Also, I would suggest considering whether this approach is really the best answer - I'm sure a library such as <a href="https://www.npmjs.com/package/pm2" rel="noreferrer">pm2</a> could handle stopping and restarting a Node instance without the risk of unwanted data hanging around, which might cause a memory leak.

blocks|key|943995|text|如果您所要做的只是重新启动服务器而不重新启动进程，那么我建议您使用http.Server.close方法。根据express+文档，app.listen方法返回一个http.Server对象，因此重新加载如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|943996|app.js|943997|const+express+=+require("express");

app+=+express();

//+Define+the+listener+function+separately+so+it+can+be+used+on+restart
function+listener()+{
++console.log("app+listening+on+port+3000");
}

//+start+the+server+and+save+a+reference+to+it+for+our+restart+function
const+server+=+app.listen(3000,+listener);

//+Export+a+restart+function+to+be+used+by+index.js
exports.restart+=+function()+{
++server.close(function()+{
++++//+Server+is+closed,+start+listening+again
++++server.listen(3000,+listener)+//+Use+the+same+listener+function+as+app.listen
++});
};|code-block|syntax|javascript|943998|index.js|943999|const+myModule+=+require("./app.js");+//+Output:+"app+listening+on+port+3000"

//+Restart+the+server,+keep+the+process
myModule.restart();+//+Output:+"app+listening+on+port+3000"|944000|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/api/http.html#http_server_close_callback|1|http://expressjs.com/en/api.html#app.listen^0|X|H|0|1R|2|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|16|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|18|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

If all you're looking to do is restart the server without restarting the process I would recommend using the <a href="https://nodejs.org/api/http.html#http_server_close_callback" rel="nofollow noreferrer">http.Server.close</a> method. According to the express <a href="http://expressjs.com/en/api.html#app.listen" rel="nofollow noreferrer">docs</a> the app.listen method returns an http.Server object, so a reload would look something like this:

<h2>app.js</h2>

<pre><code>const express = require("express");

app = express();

// Define the listener function separately so it can be used on restart
function listener() {
 console.log("app listening on port 3000");
}

// start the server and save a reference to it for our restart function
const server = app.listen(3000, listener);

// Export a restart function to be used by index.js
exports.restart = function() {
 server.close(function() {
 // Server is closed, start listening again
 server.listen(3000, listener) // Use the same listener function as app.listen
 });
};
</code></pre>

<h2>index.js</h2>

<pre><code>const myModule = require("./app.js"); // Output: "app listening on port 3000"

// Restart the server, keep the process
myModule.restart(); // Output: "app listening on port 3000"
</code></pre>

blocks|key|233176|text|我建议你在网站包中使用lazyload，我在链接中有自己的文章。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|233177|第一个应用程序|233178|angular.module('myApp',+['ui.router','oc.lazyLoad'])
++++.config(function+($stateProvider,+$locationProvider,+$ocLazyLoadProvider)+{
++++++++++++$stateProvider
++++++++++++++++.state("home",+{
++++++++++++++++++++url:+"/home",
++++++++++++++++++++templateUrl:+"Home.html",
++++++++++++++++++++controller:+'homeCtrl',
++++++++++++++++++++resolve:+{+
++++++++++++++++++++++++loadMyCtrl:+['$ocLazyLoad',+function+($ocLazyLoad)+{
++++++++++++++++++++++++++++return+$ocLazyLoad.load('homeCtrl.js');
++++++++++++++++++++++++}]
++++++++++++++++++++}
++++++++++++++++})
++++++++++++.state("profile",+{
++++++++++++++++url:"/profile",
++++++++++++++++templateUrl:+"profile.html",
+++++++++++++++++resolve:+{
++++++++++++++++++++++loadMyCtrl:+['$ocLazyLoad',+function+($ocLazyLoad)+{
++++++++++++++++++++++return+$ocLazyLoad.load('someModule.js');
++++++++++++++++++++++++}]
++++++++++++++++++++}
++++++++++++})

++++});|code-block|syntax|javascript|233179|第二应用程序|233180|(function+()+{
var+mynewapp=angular.module('someApp',['myApp']);

mynewapp.config(function(){

++//your+code+to+route+from+here!+

});
++++++mynewapp.controller("profileCtrl",+function+($scope)+{

++++++++++++console.log("reached+profile+controller");
++++++++});

})();|233181|也是一个活的柱塞|233182|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/40643629/angularjs-dynamic-loading-of-script-files-using-lazyload-webpack/|1|https://plnkr.co/edit/nkg9Xw^0|B|8|M|2|0|0|0|0|0|0|6|2|1|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|G|5|6|7|18|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1A|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1B|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1C|8|@]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|S|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]|10|$5|V|W|X|E|$Y|11]]]]

I would suggest you to use lazyload in web pack where I have my own post in this <a href="https://stackoverflow.com/questions/40643629/angularjs-dynamic-loading-of-script-files-using-lazyload-webpack/">link</a>. 

First App

<pre><code>angular.module('myApp', ['ui.router','oc.lazyLoad'])
 .config(function ($stateProvider, $locationProvider, $ocLazyLoadProvider) {
 $stateProvider
 .state("home", {
 url: "/home",
 templateUrl: "Home.html",
 controller: 'homeCtrl',
 resolve: { 
 loadMyCtrl: ['$ocLazyLoad', function ($ocLazyLoad) {
 return $ocLazyLoad.load('homeCtrl.js');
 }]
 }
 })
 .state("profile", {
 url:"/profile",
 templateUrl: "profile.html",
 resolve: {
 loadMyCtrl: ['$ocLazyLoad', function ($ocLazyLoad) {
 return $ocLazyLoad.load('someModule.js');
 }]
 }
 })

 });
</code></pre>

Second App

<pre><code>(function () {
var mynewapp=angular.module('someApp',['myApp']);

mynewapp.config(function(){

 //your code to route from here! 

});
 mynewapp.controller("profileCtrl", function ($scope) {

 console.log("reached profile controller");
 });

})();
</code></pre>

also a live <a href="https://plnkr.co/edit/nkg9Xw" rel="nofollow noreferrer">Plunker</a>

blocks|key|1142607|text|现在很简单，我更喜欢自己编写它，以减少依赖。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1142608|function+clearModule(moduleName)+{
++let+mp+=+require.resolve(moduleName)
++if+(require.cache[mp])+{
++++delete+require.cache[mp]
++++console.log(`[clear]+module:+${mp}`)
++}
}

function+requireReload(moduleName)+{
++clearModule(moduleName);
++return+require(moduleName);
}|code-block|syntax|javascript|1142609|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It's simple now, I prefer write it myself for less dependencies .

<pre class="lang-js prettyprint-override"><code>
function clearModule(moduleName) {
 let mp = require.resolve(moduleName)
 if (require.cache[mp]) {
 delete require.cache[mp]
 console.log(`[clear] module: ${mp}`)
 }
}

function requireReload(moduleName) {
 clearModule(moduleName);
 return require(moduleName);
}

</code></pre>

I would like to know how to reload a Node.js module at runtime.

Let's say I have the following code:

index.js

<pre><code>var myModule = require("./app.js");
</code></pre>

app.js

<pre><code>var express = require("express");
express.listen(3000, function() {
 console.log("app listening on port 3000");
});
</code></pre>

I tried multiple ways to reload my module required in the index.js module. But the Express app won't restart.

I would like to keep the index.js running, because it handles recompiling Babel modules on the fly. And the app.js module with the express server needs to be completely restarted.

<blockquote>
 Is there any way to do this without starting a second process for the app.js?
</blockquote>

How to reload a required module at runtime?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想知道如何在运行时重新加载Node.js模块。假设我有以下代码：index.jsvar myModule = require("./app.js");app.jsvar express = require("express");express.listen(3000, function() {    console....

问如何在运行时重新加载所需的模块？
EN

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问如何在运行时重新加载所需的模块？EN