#Trailhead Challenges2,454 discussing

Hi !

Step : Set Up Your Salesforce Mobile Developer Tools for Lightning Web Components > Use Salesforce Mobile Developer Tools

sub step: SFDX: Preview Component Locally

after install @salesforce/lwc-dev-mobile

close and re-open visual studio

Android studio is open.

Device is create for simulation.

(I tested running the simulator directly before and everything is fine.)

Error : 

Starting SFDX: Start Local Development Server
09:33:51.221 sfdx force:lightning:lwc:start
Starting SFDX: Preview Component Locally
09:33:51.326 sfdx force:lightning:lwc:preview -p Android -t Android1 -n c/bikeCard -a browser -d c:\Salesforce\Formation\bikeCard --loglevel warn
(node:1860) Warning: Deprecated environment variable: SFDX_JSON_TO_STDOUT. Please use SF_JSON_TO_STDOUT instead.
(Use `node --trace-warnings ...` to show where the warning was created)
(node:21892) Warning: Deprecated environment variable: SFDX_JSON_TO_STDOUT. Please use SF_JSON_TO_STDOUT instead.
(Use `node --trace-warnings ...` to show where the warning was created)
 »   Warning: @salesforce/cli update available from 2.26.10 to 2.27.6.
 »   Warning: @salesforce/cli update available from 2.26.10 to 2.27.6.
 »   Warning: force lightning lwc start is not a sf command.
Did you mean force lightning lwc test run? [y/n]: 
 »   Error: Run sf help force for a list of available commands.
09:34:06.773 sfdx force:lightning:lwc:start
 ended with exit code 127
Error: To run this command, install the @salesforce/lwc-dev-server plugin. For more info, see [Set Up LWC Local Development](https://developer.salesforce.com/tools/vscode/en/localdev/set-up-lwc-local-dev).
> Requirements
> Checking SDK root location
> Checking Android SDK Prerequisites
> Checking Android Command Line Tools
> Checking SDK Platform Tools
> Checking SDK Platform API
> Checking SDK Platform Emulator Images
› SfError: SDK root location not found. Please set up ANDROID_SDK_ROOT or ANDROID_HOME in your environment.
› SfError: Android command line tools not found.
› SfError: No supported Android platform tools found. Minimum supported Android platform tools version is 23.
› SfError: Android SDK is missing prerequisites: Android SDK root is not set.
› SfError: No supported Android API package found. Minimum supported Android API package version is 23.
› SfError: Install at least one of these emulator images: google_apis,default,google_apis_playstore
√ Requirements (0.000 sec)
Error (1): Requirement verifications for platform %s failed.
Try this:
Please see the error messages above for details on resolving your requirement issues.
09:34:11.483 sfdx force:lightning:lwc:preview -p Android -t Android1 -n c/bikeCard -a browser -d c:\Salesforce\Formation\bikeCard --loglevel warn
 ended with exit code 1
Error: Failed to start Android Emulator 'Android1'.

Android1 is the good name for the emulator. (cf screen 001)

They say to install the @salesforce/lwc-dev-server plugin... so i do it.

Error : 

PS C:\Salesforce\Formation\bikeCard> sf plugins install @salesforce/lwc-dev-server
 »   Warning: @salesforce/cli update available from 2.26.10 to 2.27.6.
Polling for new version(s) to become available on npm... done
Successfully validated digital signature for @salesforce/lwc-dev-server.
Finished digital signature check.
Installing plugin @salesforce/lwc-dev-server@latest... failed
 »   Warning: @salesforce/lwc-dev-server > @oclif/config@1.18.17: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.
    Error: C:\Users\xxxx\AppData\Local\sf\client\2.26.10-b796e35\node_modules\yarn\bin\yarn.js add @salesforce/lwc-dev-server@latest --non-interactive
    --mutex=file:C:\Users\xxxx\AppData\Local\sf\yarn.lock --preferred-cache-folder=C:\Users\xxxx\AppData\Local\sf\yarn --check-files exited with code 1
PS C:\Salesforce\Formation\bikeCard> 

Well : Package no longer supported.

ok....

start/stop vs

launch again SFDX: Preview Component Locally

(Is it normal that it always takes so long to get started?)

same error than first... so i search for the other error...

› SfError: SDK root location not found. Please set up ANDROID_SDK_ROOT or ANDROID_HOME in your environment.
› SfError: Android command line tools not found.
› SfError: No supported Android platform tools found. Minimum supported Android platform tools version is 23.
› SfError: Android SDK is missing prerequisites: Android SDK root is not set.
› SfError: No supported Android API package found. Minimum supported Android API package version is 23.
› SfError: Install at least one of these emulator images: google_apis,default,google_apis_playstore

well.... first error missing sdk root location... This seems like an obvious error seen like that... but in fact, no...

However, I installed Android Studio in accordance with the previous exercise. I did not find in the trailhead where we must indicate where the path of this environment variable (ANDROID_SDK_ROOT) is and especially what value to put there. I have no idea where the android sdk is...  For ANDROID_HOME it's c:\users\<username>\.android ?

Should we install the Android SDK in addition to the Android simulator ?

I welcome all help!

THANKS !

Regards,

C.

I have installed 

sf plugins install @salesforce/lwc-dev-mobile

But when I am running this SFDX: Preview Component Locally. It asks me to install 

sfdx plugins install @salesforce/lwc-dev-server                   

When I try to install lwc-dev-server, I am getting the below error. 

These are my npm and node versions

Node and npm version 

arpan.banerjee@arpanba-ltm4vtt ~ % node -v 

v18.20.5

arpan.banerjee@arpanba-ltm4vtt ~ % npm -v 

10.8.2 

arpan.banerjee@arpanba-ltm4vtt ~ % 

I have installed npm install -g node-gyp.

npm warn deprecated core-js@2.6.12: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.npm error code 127npm error path /Users/arpan.banerjee/.local/share/sf/node_modules/fibersnpm error command failednpm error command sh -c node build.js || nodejs build.jsnpm error CXX(target) Release/obj.target/fibers/src/fibers.onpm error gyp info it worked if it ends with oknpm error gyp info using node-gyp@11.0.0npm error gyp info using node@22.11.0 | darwin | arm64npm error gyp info find Python using Python version 3.13.1 found at "/opt/homebrew/opt/python@3.13/bin/python3.13"npm error gyp info spawn /opt/homebrew/opt/python@3.13/bin/python3.13npm error gyp info spawn args [npm error gyp info spawn args '/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/node_modules/node-gyp/gyp/gyp_main.py',npm error gyp info spawn args 'binding.gyp',npm error gyp info spawn args '-f',npm error gyp info spawn args 'make',npm error gyp info spawn args '-I',npm error gyp info spawn args '/Users/arpan.banerjee/.local/share/sf/node_modules/fibers/build/config.gypi',npm error gyp info spawn args '-I',npm error gyp info spawn args '/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/node_modules/node-gyp/addon.gypi',npm error gyp info spawn args '-I',npm error gyp info spawn args '/Users/arpan.banerjee/Library/Caches/node-gyp/22.11.0/include/node/common.gypi',npm error gyp info spawn args '-Dlibrary=shared_library',npm error gyp info spawn args '-Dvisibility=default',npm error gyp info spawn args '-Dnode_root_dir=/Users/arpan.banerjee/Library/Caches/node-gyp/22.11.0',npm error gyp info spawn args '-Dnode_gyp_dir=/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/node_modules/node-gyp',npm error gyp info spawn args '-Dnode_lib_file=/Users/arpan.banerjee/Library/Caches/node-gyp/22.11.0/<(target_arch)/node.lib',npm error gyp info spawn args '-Dmodule_root_dir=/Users/arpan.banerjee/.local/share/sf/node_modules/fibers',npm error gyp info spawn args '-Dnode_engine=v8',npm error gyp info spawn args '--depth=.',npm error gyp info spawn args '--no-parallel',npm error gyp info spawn args '--generator-output',npm error gyp info spawn args 'build',npm error gyp info spawn args '-Goutput_dir=.'npm error gyp info spawn args ]npm error gyp info spawn makenpm error gyp info spawn args [ 'BUILDTYPE=Release', '-C', 'build' ]npm error ../src/fibers.cc:27:65: error: no member named 'kFinalizer' in 'v8::WeakCallbackType'npm error    27 |                 handle.SetWeak(val, WeakCallbackShim<F, P>, WeakCallbackType::kFinalizer);npm error       |                                                             ~~~~~~~~~~~~~~~~~~^npm error 1 error generated.npm error make: *** [Release/obj.target/fibers/src/fibers.o] Error 1npm error gyp ERR! build error npm error gyp ERR! stack Error: `make` failed with exit code: 2npm error gyp ERR! stack at ChildProcess.<anonymous> (/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/node_modules/node-gyp/lib/build.js:216:23)npm error gyp ERR! System Darwin 24.2.0npm error gyp ERR! command "/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/bin/node" "/Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--release"npm error gyp ERR! cwd /Users/arpan.banerjee/.local/share/sf/node_modules/fibersnpm error gyp ERR! node -v v22.11.0npm error gyp ERR! node-gyp -v v11.0.0npm error gyp ERR! not ok npm error node-gyp exited with code: 1npm error Please make sure you are using a supported platform and node version. If younpm error would like to compile fibers on this machine please make sure you have setup yournpm error build environment--npm error Windows + OS X instructions here: https://github.com/nodejs/node-gypnpm error Ubuntu users please run: `sudo apt-get install g++ build-essential`npm error RHEL users please run: `yum install gcc-c++` and `yum groupinstall 'Development Tools'` npm error Alpine users please run: `sudo apk add python make g++`npm error sh: nodejs: command not foundnpm error A complete log of this run can be found in: /Users/arpan.banerjee/.npm/_logs/2025-01-03T10_52_27_535Z-debug-0.log@salesforce/cli: Installing plugin @salesforce/lwc-dev-server@latest... failed ›   Error: /Users/arpan.banerjee/.local/share/sf/client/2.70.7-b4edef3/node_modules/npm/bin/npm-cli.js install  ›   @salesforce/lwc-dev-server@latest --omit dev --no-audit --loglevel=notice --no-fund exited with code 127 ›   Try this: Run with DEBUG=@oclif/plugin-plugins* to see debug output.

Attaching the screenshot of the error-

#Trailhead Challenges