blocks|key|4337238|text|当我使用ionic+cli构建应用程序(ionic3%2B+angular5)时，同样的问题也发生在我身上。我将'@ionic/app-scripts‘更新到版本'3.1.6'，然后解决了问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337239|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

When I use ionic cli build app(ionic3 + angular5),same problem happened to me.I updated '@ionic/app-scripts' to version '3.1.6',then problem solved

blocks|key|4337285|text|试着这样做|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337286|ionic+serve+--verbose+=>不工作，有错误；|offset|length|style|CODE|4337287|npm+run+ionic:build+--verbose+=>ran，用OK完成。|4337288|entityMap^0|0|0|L|0|0|T|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

Try like this

<code>ionic serve --verbose</code> =>didn’t work, there were errors;

<code>npm run ionic:build --verbose</code> =>ran, finnished with OK.

blocks|key|4337569|text|使用"npm+install“，然后使用"gulp”和"gulp“。还要确保您更新了所有依赖项。通过"ionic+info“检查您的依赖项的版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337570|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Use "npm install" and then "gulp build" &amp; "gulp serve". Also make sure you update all the dependencies. Check versions of your dependencies by "ionic info".

blocks|key|4337821|text|请尝试以下步骤..也许这会有帮助|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337822|npm+install+-g+ionic@latest

npm+install+@ionic/app-scripts@latest+--save-dev

npm+install+ionic-angular@latest+--save

ionic+serve|code-block|syntax|javascript|4337823|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|$]]

Try below steps.. May be it will help

<pre><code>npm install -g ionic@latest

npm install @ionic/app-scripts@latest --save-dev

npm install ionic-angular@latest --save

ionic serve
</code></pre>

blocks|key|4337938|text|请在您的项目中使用这些命令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337939|sudo+sysctl+fs.inotify.max_user_watches=524288

sudo+sysctl+-p+--system|code-block|syntax|javascript|4337940|再一次运行离子服务器|4337941|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Please use these commands in your project.

<pre><code>sudo sysctl fs.inotify.max_user_watches=524288

sudo sysctl -p --system
</code></pre>

And again run ionic serve

blocks|key|4337668|text|删除node_modules文件夹，然后使用以下命令|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4337669|npm+install|code-block|syntax|javascript|4337670|紧接着是|4337671|ionic+serve--verbose|4337672|希望它能正常工作。|4337673|entityMap^0|2|C|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

Delete the <code>node_modules</code> folder and then use the command

<pre><code>npm install
</code></pre>

followed by 

<pre><code>ionic serve--verbose
</code></pre>

Hope that it works fine.

blocks|key|4337319|text|您不应该将"sudo“与任何ionic/npm命令一起使用。如果没有"sudo“就抛出错误，那么您可以通过更改npm包的所有者来修复它，使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337320|sudo+chown+-R+$(whoami)+~/.npm|offset|length|style|CODE|4337321|entityMap^0|0|0|U|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

You should not use "sudo" with any of the ionic/npm commands. If it throws error without "sudo", then you can fix it by changing the owner of the npm packages, using the command below:

<code>sudo chown -R $(whoami) ~/.npm</code>

blocks|key|4337349|text|我运行ionic+3应用程序的配置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337350|cli包：(/usr/local/lib/node_modules)|4337351|@ionic/cli-utils++:+1.19.1
ionic+(Ionic+CLI)+:+3.19.1|code-block|syntax|javascript|4337352|全局包：|4337353|cordova+(Cordova+CLI)+:+8.0.0+|4337354|本地包：|4337355|@ionic/app-scripts+:+3.1.7
Cordova+Platforms++:+android+6.3.0
Ionic+Framework++++:+ionic-angular+3.9.2|4337356|系统：|4337357|Android+SDK+Tools+:+26.1.1
Node++++++++++++++:+v8.2.1
npm+++++++++++++++:+5.5.0+
OS++++++++++++++++:+Linux+4.4|4337358|环境变量：|4337359|ANDROID_HOME+:+/root/Android/Sdk|4337360|其他：|4337361|backend+:+pro|4337362|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1C|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|6|7|1D|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|1E|8|@]|9|@]|A|$G|H]]|$1|Y|3|Z|5|6|7|1F|8|@]|9|@]|A|$]]|$1|10|3|11|5|F|7|1G|8|@]|9|@]|A|$G|H]]|$1|12|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|13|$]]

my configurations for running ionic 3 application:

cli packages: (/usr/local/lib/node_modules)

<pre><code>@ionic/cli-utils : 1.19.1
ionic (Ionic CLI) : 3.19.1
</code></pre>

global packages:

<pre><code>cordova (Cordova CLI) : 8.0.0 
</code></pre>

local packages:

<pre><code>@ionic/app-scripts : 3.1.7
Cordova Platforms : android 6.3.0
Ionic Framework : ionic-angular 3.9.2
</code></pre>

System:

<pre><code>Android SDK Tools : 26.1.1
Node : v8.2.1
npm : 5.5.0 
OS : Linux 4.4
</code></pre>

Environment Variables:

<pre><code>ANDROID_HOME : /root/Android/Sdk
</code></pre>

Misc:

<pre><code>backend : pro
</code></pre>

blocks|key|4337722|text|在提示符中使用这些命令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337723|npm+cache+clear+--force
rm+-rf+node_modules/
npm+install+-d|code-block|syntax|javascript|4337724|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|$]]

Use these commands in your prompt.

<pre><code>npm cache clear --force
rm -rf node_modules/
npm install -d
</code></pre>

blocks|key|4337756|text|安装%25+ws：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337757|npm+install+ws@3.3.2+--save-dev+--save-exact|code-block|syntax|javascript|4337758|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|$]]

Install ws:

<pre><code>npm install ws@3.3.2 --save-dev --save-exact
</code></pre>

blocks|key|4337850|text|你试过用这个cmd吗|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337851|npm+run+ionic:服务|4337852|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Have you tried using this cmd

npm run ionic:serve

blocks|key|4337894|text|我觉得你的问题是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337895|NODE+version+(6.9.1)+..+|code-block|syntax|javascript|4337896|你能试着升级到9.1.0或更高版本吗？|4337897|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I think your prob is the 

<pre><code>NODE version (6.9.1) .. 
</code></pre>

can you just try to upgrade to 9.1.0 or more?

blocks|key|4337721|text|在package.json文件中包含以下脚本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337722|"browser":+"ionic-app-scripts+serve+--sourceMap+source-map+--iscordovaserve+--wwwDir+platforms/browser/www/+--buildDir+platforms/browser/www/build"
and+run|code-block|syntax|javascript|4337723|之后运行npm+run+browser|offset|length|style|CODE|4337724|entityMap^0|0|0|4|F|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Include below script in the package.json file 

<pre><code>"browser": "ionic-app-scripts serve --sourceMap source-map --iscordovaserve --wwwDir platforms/browser/www/ --buildDir platforms/browser/www/build"
and run
</code></pre>

After It Run <code>npm run browser</code>

blocks|key|4338055|text|我以前遇到过这个问题，试一下这个而不是离子服务：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4338056|npm+run+ionic:serve|code-block|syntax|javascript|4338057|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|$]]

i faced this problem before ,try this instead of ionic serve :

<pre><code>npm run ionic:serve
</code></pre>

blocks|key|4337793|text|我曾经遇到过这样的问题，我尝试了一个新的应用程序，运行得很好，尝试了另一个旧的应用程序，也运行得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337794|尝试停止使用某些模块(在我的情况下是剪贴板和另一个)，解决了问题，在我的情况下，这是我导入或使用它的方式的错误。|4337795|ionic+5是我的ionic版本|4337796|希望这能帮助到一些人|4337797|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I have faced such a problem, tried a fresh new app, worked perfectly, tried another old app, also worked perfectly.

Tried to stop using some modules (clipboard in my case and another one), solved the problem, in my case it was an error in the way I am importing or using it.

ionic 5 is my ionic version

Hope this will help someone

blocks|key|4338124|text|对我来说起作用的是修复ionic+repair项目，然后我运行ionic+serve，它运行得很好。希望这能解决你的问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4338125|entityMap^0|B|C|V|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

What Worked for me was repairing the project <code>ionic repair</code> , then I ran <code>ionic serve</code> and it worked fine. Hope this solves your problem.

My Ionic info:

<pre><code>cli packages: (/usr/lib/node_modules)

@ionic/cli-utils : 1.9.2
ionic (Ionic CLI) : 3.9.2

global packages:

Cordova CLI : 7.0.1 

local packages:

@ionic/app-scripts : 3.1.0
Cordova Platforms : browser 4.1.0
Ionic Framework : ionic-angular 3.9.2

System:

Node : v6.9.0
npm : 3.10.8 
OS : Linux 4.4
</code></pre>

Ionic serve is working fine, but does not detect any file changes! 

The problem appears only for Ionic v3 and v2 projects.

My Ionic v1 projects are working fine.

Ionic serve not working in Ionic 3

服务器

Android

Cordova

Linux

Ionic

我的离子信息：cli packages: (/usr/lib/node_modules)@ionic/cli-utils  : 1.9.2ionic (Ionic CLI) : 3.9.2global packages:Cordova CLI : 7.0.1 local packages:@ionic/app-scripts : 3.1.0Cordova Platforms  : browser 

问Ionic serve在Ionic 3中不工作
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问Ionic serve在Ionic 3中不工作EN

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问Ionic serve在Ionic 3中不工作
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