ERROR in node_modules/@types/pdfjs-dist/index.d.ts(63,39): error TS2304: Cannot find name 'unknown'
Solution 1
I had a similar problem with my project based on Angular 6. From package.json:
"dependencies": {
...
"ng2-pdf-viewer": "^5.2.3",
"rxjs": "6.3.3",
},
"devDependencies": {
...
"typescript": "^2.7.2"
}
From package-lock.json (1st generated by npm install command):
...
"ng2-pdf-viewer": {
"version": "5.3.4",
"resolved": "_removed_",
"integrity": "_removed_",
"requires": {
"@types/pdfjs-dist": "^2.0.1",
"pdfjs-dist": "^2.2.228",
"tslib": "^1.9.0"
}
},
...
"pdfjs-dist": {
"version": "2.2.228",
"resolved": "_removed_",
"integrity": "_removed_",
"requires": {
"node-ensure": "^0.0.0",
"worker-loader": "^2.0.0"
}
},
...
"@types/pdfjs-dist": {
"version": "2.1.3",
"resolved": "_removed_",
"integrity": "_removed_"
},
...
In order to solve the problem, I change @types/pdfjs-dist version to "2.1.0" in the package-lock.json file. Delete the node_modules folder, then execute "npm install".
Another problem you may encounter is
ERROR in node_modules/@types/pdfjs-dist/index.d.ts(7,1): error TS1084: Invalid 'reference' directive syntax.
To solve this problem, open the file "node_modules/@types/pdfjs-dist/index.d.ts", then search for three slashes near line 7
/// <reference lib="dom"/>
then remove a slash to "
// <reference lib="dom"/>
Solution 2
Did you try updating your typescript version to 3 ?
npm i -D typescript@3
or
"skipLibCheck": true
Ash
Updated on June 28, 2022Comments
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Ash almost 2 years
I m using ng2-pdf-viewer in angular 6 project,
On project compilation it gives following errors
ERROR in node_modules/@types/pdfjs-dist/index.d.ts(63,39): error TS2304: Cannot find name 'unknown'.
node_modules/@types/pdfjs-dist/index.d.ts(65,34): error TS2304: Cannot find name 'unknown'.
node_modules/@types/pdfjs-dist/index.d.ts(80,31): error TS2304: Cannot find name 'unknown'.
node_modules/@types/pdfjs-dist/index.d.ts(82,30): error TS2304: Cannot find name 'unknown'my package.json file is as post below
"dependencies": { "@angular/animations": "^6.1.10", "@angular/common": "^6.1.0", "@angular/compiler": "^6.1.0", "@angular/core": "^6.1.0", "@angular/forms": "^6.1.0", "@angular/http": "^6.1.0", "@angular/platform-browser": "^6.1.0", "@angular/platform-browser-dynamic": "^6.1.0", "@angular/router": "^6.1.0", "@ngx-translate/core": "^11.0.1", "@ngx-translate/http-loader": "^4.0.0", "@vimeo/player": "^2.10.0", "@types/node": "10.3.1", "angular-6-datatable": "~0.8.0", "angular-6-social-login": "~1.1.1", "bootstrap": "^4.3.1", "core-js": "^2.5.4", "crypto-js": "~3.1.9-1", "devextreme": "^19.1.5", "devextreme-angular": "^19.1.5", "font-awesome": "~4.7.0", "jquery": "^3.4.1", "ng2-drag-drop": "^3.0.2", "ng2-pdf-viewer": "^6.0.2", "ng5-slider": "^1.2.4", "ngx-bootstrap": "^3.3.0", "ngx-drag-scroll": "~7.4.2", "ngx-image-cropper": "~1.3.10", "ngx-loading": "^3.0.1", "ngx-owl-carousel-o": "~1.1.5", "ngx-rating": "0.0.9", "ngx-slick-carousel": "^0.4.4", "ngx-toastr": "~10.0.4", "ngx-ui-loader": "^7.2.2", "popper.js": "~1.15.0", "rxjs": "~6.2.0", "rxjs-compat": "^6.5.2", "slick-carousel": "^1.8.1", "stream": "0.0.2", "swiper": "^4.5.0", "zone.js": "~0.8.26" }, "devDependencies": { "@angular-devkit/build-angular": "~0.8.0", "@angular/cli": "~6.2.9", "@angular/compiler-cli": "^6.1.0", "@angular/language-service": "^6.1.0", "@types/jasmine": "~2.8.8", "@types/jasminewd2": "~2.0.3", "codelyzer": "~4.3.0", "jasmine-core": "~2.99.1", "jasmine-spec-reporter": "~4.2.1", "karma": "~3.0.0", "karma-chrome-launcher": "~2.2.0", "karma-coverage-istanbul-reporter": "~2.0.1", "karma-jasmine": "~1.1.2", "karma-jasmine-html-reporter": "^0.2.2", "protractor": "~5.4.0", "ts-node": "~7.0.0", "tslint": "~5.11.0", "typescript": "~2.9.2" }
This is my package.json file
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Ash over 4 yearsYes I have tried but it shows ERROR in The Angular Compiler requires TypeScript >=2.7.2 and <2.10.0 but 3.7.4 was found instead. Project is in angular 6
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sam_dev over 4 yearsCan you try adding "skipLibCheck": true to your tsconfig and check once ?
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Ash over 4 yearsThanks @sameer , Its working fine. But Skip Library check option is a right way to solve this, I am little confused.