I'm building an app using the Ionic framework, which I've done in the browser until now. Because I now want to use the cordovaOauth plugin I need to use the emulator. The problem is that I can't see any console.log() in the emulator as I do in the browser, which makes it hard to debug.
Does anybody know how in Ionic/Cordova I can make use of console logging in the emulator? All tips are welcome!
Just enable the console logs in the emulator. Here my example:
> ionic emulate ios --livereload
Setup Live Reload
Running dev server: http://localhost:8100
Adding in default Ionic hooks
Running live reload server: http://localhost:35729
Watching : [ 'www/**/*', '!www/lib/**/*' ]
Ionic server commands, enter:
restart or r to restart the client app from the root
goto or g and a url to have the app navigate to the given url
consolelogs or c to enable/disable console log output
serverlogs or s to enable/disable server log output
quit or q to shutdown the server and exit
Type consolelogs in the command line and hit enter.
consolelogs
Console log output: enabled
Loading: /?restart=382451
ionic $ 0 498458 log Hi there! This is from console.log
run ionic emulate ios -l -c
This will open the emulator with livereload feature, and you'll see all the console logs in the terminal.
To turn the console logs off (or on) just write consolelogs or just c in the terminal while the ionic server is running
Another very convenient way to debug your app when using iOS emulator/device is using the Safari developer tools
When the app runs - enter Safari and choose "Develop > iOS Simulator > your page"
If you work with a real device you'll see the device's name instead of "iOS Simulator"
If you don't see the "Develop" menu in safari - enter Safari's preferences and enable it from the "advanced" tab
If you wan't to watch console logs in emulator / simulator use
ionic emulate -l -c <PLATFORM>If you wan't to watch console logs when testing in device you can launch this command :
ionic run -l -c <PLATFORM>
-c = --consolelogs: Print app console logs to Ionic CLI (livereload req.)
-l = --livereload: Live reload app dev files from the device
May help someone !
If you are testing your web app with a device running Android 4.4 or higher, you can remotely debug your web pages in WebView with Chrome Developer Tools. Just open chrome://inspect on your desktop with the phone in USB Debugging mode connected.
There are a few ways to debug your ionic app.
- In the browser you can catch the errors in the console.
- If you are emulating your app on a simulator or a mobile device you can install the cordova plugin that displays js errors in the xcode console. So you can emulate your device and catch errors on xcode.
Here is how you add the plugin:
cordova plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-console.git
Hope this helps! It came in very handy for me while I was debugging GeoFire errors and testing the cordova camera and geolocation api.
On Ionic 3, you can do this by
ionic cordova run android --emulator -l -c
Replace android with ios depending on your requirements. More information here: https://ionicframework.com/docs/cli/cordova/run/
来源：https://stackoverflow.com/questions/28611375/how-to-watch-console-logs-in-ionic-emulator