I believe your proximate problem is a fight between these two folks. The first thing I would try is bumping typescript to 2.7.2, and if that fixes this problem but causes others, then look for a version of @types/node that doesn’t contain the “unique symbol” construct.
2 Likes
I updated typescript by typing npm install typescript@2.7.2 and worked.
Thank you very much. But why this problem happened? I followed instructions. It should install what everything its need right?
3 Likes
That’s a good question. I played along with you yesterday, but my ionic-angular project did not get @types/node in its package.json at all, so while I did get typescript 2.6.2 like you did, I didn’t have the problematic @types/node with its >=2.7 syntax. Can you think of anything you did after spawning the project that may have caused that to get in there?
By the way, I’ve been assuming throughout this convo that you have some very specific and compelling reason to be wanting to start a new framework v3 ionic-angular project now. If that’s not the case, I would really recommend just going with type=angular, if for no other reason than there are far more eyes on that, so any problems you run into should be (a) marginally less strange and (b) perhaps a higher priority for getting fixed upstream.
ADDENDUM: if this is more than a toy proof-of-concept, you’ve also got a lurking time bomb in that you’re mixing ionic-native v4 and v5 parts. They all must be on the same major version number (strictly speaking, @ionic-native/foo must have the same major version as @ionic-native/core, but the transitive property of dependencies (to coin a rather awkward phrase) means that all @ionic-native/* has to share the same major version).
1 Like
No. I just developed little bit more for ui part after start. And install some plugins. But this problem been there for all time. Didn’t happened after i installed or did something. I wondered if i did something that cause this problem and start completely new v3 project and still the problem was there, waiting for me 
I wanted to use v3 because i developed few project with it. After CLI updated 4 getting use to it was not easy for me. But i am going to.
Thank you for all your advise.
That’s understandable. I’ll just say that if you’re thinking that the difference / learning curve between framework v3 (type=ionic-angular) and v4 (type=angular) is anywhere near that encountered when going from v1 (type=ionic1), it’s not. AngularJS to Angular entails a complete app redesign. Angular 5 and ionic-angular to Angular 8 (9 any day now, I expect) and @ionic/angular is much more incremental/minimal.
I’m facing the same problem here with a fresh blank Ionic V3 project. It’s a test project because it is happening to all my V3 projects and I need to find a solution for this as I can’t convert the other projects to V4 at the moment. And I’m wondering if this problem interferes in any way with the prod build.
None of the solutions proposed above worked for me!
Here’s my package.json
{
"name": "userApp",
"version": "0.0.1",
"author": "Ionic Framework",
"homepage": "http://ionicframework.com/",
"private": true,
"scripts": {
"start": "ionic-app-scripts serve",
"clean": "ionic-app-scripts clean",
"build": "ionic-app-scripts build",
"lint": "ionic-app-scripts lint"
},
"dependencies": {
"@angular/animations": "5.2.11",
"@angular/common": "5.2.11",
"@angular/compiler": "5.2.11",
"@angular/compiler-cli": "5.2.11",
"@angular/core": "5.2.11",
"@angular/forms": "5.2.11",
"@angular/platform-browser": "5.2.11",
"@angular/platform-browser-dynamic": "5.2.11",
"@ionic-native/core": "4.20.0",
"@ionic-native/splash-screen": "4.20.0",
"@ionic-native/status-bar": "4.20.0",
"@ionic/storage": "2.2.0",
"@types/node": "^13.1.4",
"ionic-angular": "3.9.9",
"ionicons": "3.0.0",
"rxjs": "5.5.11",
"sw-toolbox": "3.6.0",
"zone.js": "0.8.29"
},
"devDependencies": {
"@ionic/app-scripts": "3.2.4",
"typescript": "^2.7.2"
},
"description": "An Ionic project"
}
and here my environment
Ionic:
Ionic CLI : 5.4.16 (/usr/local/lib/node_modules/ionic)
Ionic Framework : ionic-angular 3.9.9
@ionic/app-scripts : 3.2.4
Utility:
cordova-res (update available: 0.9.0) : 0.8.1
native-run (update available: 0.3.0) : 0.2.8
System:
NodeJS : v12.14.0 (/usr/local/Cellar/node@12/12.14.0/bin/node)
npm : 6.13.4
OS : macOS Catalina
Anything i am missing? Any help will be very much appreciated
Are you certain about this? Can you post your error messages (as text, not images)?
The problem is that the error is huge… and all related to @types/node, @types/yargs
I didn’t copy the full list but here you see some of them…
I know it must be something related to my system because this is happening with the V4 projects as well. Running ionic serve throws these errors but then I save any .ts file and voila everything works…
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/events.d.ts
function on(emitter: EventEmitter, event: string): AsyncIterableIterator<any>;
const captureRejectionSymbol: unique symbol;
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/events.d.ts
*/
const errorMonitor: unique symbol;
/**
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/repl.d.ts
*/
const REPL_MODE_SLOPPY: unique symbol;
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/repl.d.ts
*/
const REPL_MODE_STRICT: unique symbol;
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/util.d.ts
let replDefaults: InspectOptions;
const custom: unique symbol;
}
Typescript Error
'=' expected.
Users/tattivitorino/node_modules/@types/node/util.d.ts
namespace promisify {
const custom: unique symbol;
}
Typescript Error
')' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { type: "number" } ? number :
O extends { type: "string" } ? string :
O extends { array: true } ? Array<string | number> :
Typescript Error
';' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { type: "number" } ? number :
O extends { type: "string" } ? string :
O extends { array: true } ? Array<string | number> :
Typescript Error
Expression expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { type: "number" } ? number :
O extends { type: "string" } ? string :
O extends { array: true } ? Array<string | number> :
Typescript Error
'(' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { type: "number" } ? number :
O extends { type: "string" } ? string :
O extends { array: true } ? Array<string | number> :
Typescript Error
')' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { boolean: true } ? boolean :
O extends { number: true } ? number :
O extends { string: true } ? string :
Typescript Error
';' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { boolean: true } ? boolean :
O extends { number: true } ? number :
O extends { string: true } ? string :
Typescript Error
Expression expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { boolean: true } ? boolean :
O extends { number: true } ? number :
O extends { string: true } ? string :
Typescript Error
'(' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { boolean: true } ? boolean :
O extends { number: true } ? number :
O extends { string: true } ? string :
Typescript Error
';' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { normalize: true } ? string :
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
Typescript Error
Declaration or statement expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { normalize: true } ? string :
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
Typescript Error
Declaration or statement expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { normalize: true } ? string :
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
Typescript Error
';' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { normalize: true } ? string :
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
Typescript Error
Declaration or statement expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { normalize: true } ? string :
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
Typescript Error
';' expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
unknown;
Typescript Error
Declaration or statement expected.
Users/tattivitorino/node_modules/@types/yargs/index.d.ts
O extends { choices: ReadonlyArray<infer C> } ? C :
O extends { coerce: (arg: any) => infer T } ? T :
unknown;
What’s weird about that is that unique symbol was added in TypeScript 2.7, yet the package.json you posted claimed to be declaring ^2.7.2. Can you check what version of typescript is actually installed?
$ grep _id node_modules/typescript/package.json
Updating typescript to 2.7.2 solved the issue for me
2 Likes
that worked for me as well!
Hi everyone,
I hit the same issue described in the first post of this topic, then proceeded to update typescript to 2.7.2 and still got other issues of similar style.
So, I rolled back my typescript update to the original version in the project:
"typescript": "2.3.4"
Then I added "types": [] to the "compilerOptions" parameter of tsconfig.json as suggested here and here.
Problem fixed!
How did I get the issue?
I started to work again on an Ionic 3 project that I did not modify for a year or so. What I did modify surely was the nodejs version installed on my laptop. I did not change anything inside the project itself.
Thank you!
Gustavo.
1 Like
solves my problem too after upgrading to 2.7.2
1 Like
Continuing the discussion from Typescript Error '=' expected and more:
HI below is my json file, i still get the typescript error also sharing my error’s below @rapropos plz do help me on this
{
“name”: “”,
“version”: “1.0.0”,
“author”: “Ionic Framework”,
“homepage”: “http://ionicframework.com/”,
“private”: true,
“scripts”: {
"clean": "ionic-app-scripts clean",
"build": "ionic-app-scripts build",
"lint": "ionic-app-scripts lint",
"ionic:build": "ionic-app-scripts build",
"ionic:serve": "ionic-app-scripts serve"
},
“dependencies”: {
"@angular/animations": "^4.3.6",
"@angular/cli": "^1.3.2",
"@angular/common": "4.1.3",
"@angular/compiler": "4.1.3",
"@angular/compiler-cli": "4.1.3",
"@angular/core": "4.1.3",
"@angular/forms": "4.1.3",
"@angular/http": "4.1.3",
"@angular/platform-browser": "4.1.3",
"@angular/platform-browser-dynamic": "4.1.3",
"@angular/router": "^4.4.1",
"@ionic-native/core": "3.12.1",
"@ionic-native/splash-screen": "3.12.1",
"@ionic-native/status-bar": "3.12.1",
"@ionic/app-scripts": "^3.2.4",
"@ionic/storage": "2.0.1",
"@types/moment": "^2.13.0",
"@types/moment-timezone": "^0.5.13",
"ajv": "^5.2.2",
"angular-calendar": "^0.21.2",
"angular-captcha": "^1.2.2",
"angular2-highcharts": "^0.5.5",
"angular2-signaturepad": "^2.9.0",
"cordova": "^6.5.0",
"ionic-angular": "^3.9.10",
"ionic-native": "^2.2.3",
"ionicons": "3.0.0",
"moment-timezone": "^0.5.26",
"ng2-charts": "^1.6.0",
"rxjs": "5.4.0",
"sw-toolbox": "3.6.0",
"typescript": "^2.7.2",
"zone.js": "0.8.12"
},
“devDependencies”: {
"@angular/cli": "^1.2.4"
},
“cordovaPlugins”: [
"cordova-plugin-whitelist",
"cordova-plugin-statusbar",
"cordova-plugin-console",
"cordova-plugin-device",
"ionic-plugin-keyboard",
"cordova-plugin-splashscreen",
"cordova-plugin-camera"
],
“cordovaPlatforms”: ,
“description”: “An Ionic project”
}
Typescript Error
‘;’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
| names(): string; | |
|---|---|
| zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never; | |
| zonesForCountry(country: string, with_offset?: T): T extends false ? string : never; |
Typescript Error
‘;’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
| names(): string; | |
|---|---|
| zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never; | |
| zonesForCountry(country: string, with_offset?: T): T extends false ? string : never; |
Typescript Error
‘;’ expected.
…g ortus/migrate/ManageMyHealthAU_migrate/node_modules/moment-timezone/index.d.ts
| names(): string; | |
|---|---|
| zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never; | |
| zonesForCountry(country: string, with_offset?: T): T extends false ? string : never; |
Typescript Error
‘;’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
Typescript Error
‘)’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
Typescript Error
Expression expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
Typescript Error
‘;’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
Typescript Error
Declaration or statement expected.
…g ortus/migrate/ManageMyHealthAU_migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
Typescript Error
‘;’ expected.
…g ortus/migrate/node_modules/moment-timezone/index.d.ts
zonesForCountry(country: string, with_offset: T): T extends true ? MomentZoneOffset : never;
zonesForCountry(country: string, with_offset?: T): T extends false ? string : never;
zonesForCountry(country: string, with_offset?: boolean): MomentZoneOffset string;
First thing I would do is ditch moment in favor of date-fns. There may be some version of moment-timezone that is compatible with your old typescript, but I’m not motivated to find it.
did you try adding "types": [] to the "compilerOptions" parameter of tsconfig.json as explained in this post?
1 Like
yes i tried, it doesn’t work
solved the issue by adding "types": [] to the "compilerOptions" in tsconfig.js 
1 Like
this worked for me!
“types”: added to compilerOptions attr of tsconfig.json
but i kept my typescript to “typescript”: “~2.6.2”
thx a lot Gustavo
1 Like
Whenever TypeScript finds an error, it tries to explain what went wrong in as much detail as possible. Because its type system is structural, this often means providing somewhat lengthy descriptions of where it found a problem.
Regards,
Rachel Gomez