Comprehensive compilation of Typescript error codes along with solutions

Question

Comprehensive compilation of Typescript error codes along with solutions

Where can I find a comprehensive list of Typescript error codes and their corresponding fixes?

I frequently encounter errors during compilation, such as:

data_loader_service.ts(10,13): error TS1005: '=>' expected.
data_loader_service.ts(10,24): error TS1144: '{' or ';' expected.
data_loader_service.ts(10,27): error TS1068: Unexpected token. A constructor, method, accessor, or property was expected.
data_loader_service.ts(14,1): error TS1128: Declaration or statement expected.

I am in search of a convenient resource where I can easily look up these error codes like TS1068 and learn about common causes and solutions.

I admire tools like Jscs which provide clear summaries of error codes.

For example, check out the rules page on Jscs:

I welcome suggestions that point me towards either source code references or websites similar to Jscs for assistance with Typescript (current version being 1.6).

typescript

Answer 1

Answer №1

Upon examining the 1.6.2 versions of the compiler's source files, such as tsc.js, tsserver.js, typescript.js, and typescriptServices.js, a variable named ts.Diagnostics is populated with a dictionary containing all the error codes.

For a detailed list of error codes and their definitions in version 1.6.2 (albeit presented in a less visually appealing manner), visit: https://github.com/Microsoft/TypeScript/blob/v1.6.2/src/compiler/diagnosticInformationMap.generated.ts

A more visually pleasing format of this information can be found here: https://github.com/Microsoft/TypeScript/blob/v1.6.2/src/compiler/diagnosticMessages.json

EDIT:

To access the errors specific to version 1.8.5, refer to: https://github.com/Microsoft/TypeScript/blob/v1.8.5/src/compiler/diagnosticMessages.json

Answer 2

Upon examining the 1.6.2 versions of the compiler's source files, such as tsc.js, tsserver.js, typescript.js, and typescriptServices.js, a variable named ts.Diagnostics is populated with a dictionary containing all the error codes.

For a detailed list of error codes and their definitions in version 1.6.2 (albeit presented in a less visually appealing manner), visit: https://github.com/Microsoft/TypeScript/blob/v1.6.2/src/compiler/diagnosticInformationMap.generated.ts

A more visually pleasing format of this information can be found here: https://github.com/Microsoft/TypeScript/blob/v1.6.2/src/compiler/diagnosticMessages.json

EDIT:

To access the errors specific to version 1.8.5, refer to: https://github.com/Microsoft/TypeScript/blob/v1.8.5/src/compiler/diagnosticMessages.json

Answer 3

Answer №2

I created a custom script to extract a basic reference table from the official TypeScript repository:

$ curl -sL https://github.com/microsoft/TypeScript/raw/v4.7.3/src/compiler/diagnosticMessages.json | jq -r 'to_entries[]|"TS\(.value.code): \(.key)"'

Here is the generated output:

TS1002: Unterminated string literal.
TS1003: Identifier expected.
TS1005: '{0}' expected.
TS1006: A file cannot have a reference to itself.
TS1007: The parser expected to find a '{1}' to match the '{0}' token here.
TS1009: Trailing comma not allowed.
TS1010: '*/' expected.
TS1011: An element access expression should take an argument.
TS1012: Unexpected token.
TS1013: A rest parameter or binding pattern may not have a trailing comma.
TS1014: A rest parameter must be last in a parameter list.
TS1015: Parameter cannot have question mark and initializer.
TS1016: A required parameter cannot follow an optional parameter.
TS1017: An index signature cannot have a rest parameter.
TS1018: An index signature parameter cannot have an accessibility modifier.
TS1019: An index signature parameter cannot have a question mark.
TS1020: An index signature parameter cannot have an initializer.
...
TS18012: '#constructor' is a reserved word.
TS18013: Property '{0}' is not accessible outside class '{1}' because it has a private identifier.
TS18014: The property '{0}' cannot be accessed on type '{1}' within this class because it is shadowed by another private identifier with the same spelling.
TS18015: Property '{0}' in type '{1}' refers to a different member that cannot be accessed from within type '{2}'.
TS18016: Private identifiers are not allowed outside class bodies.
TS18017: The shadowing declaration of '{0}' is defined here
TS18018: The declaration of '{0}' that you probably intended to use is defined here
TS18019: '{0}' modifier cannot be used with a private identifier.
TS18024: An enum member cannot be named with a private identifier.
TS18026: '#!' can only be used at the start of a file.
TS18027: Compiler reserves name '{0}' when emitting private identifier downlevel.
TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.
TS18029: Private identifiers are not allowed in variable declarations.
TS18030: An optional chain cannot contain private identifiers.
TS18031: The intersection '{0}' was reduced to 'never' because property '{1}' has conflicting types in some constituents.
TS18032: The intersection '{0}' was reduced to 'never' because property '{1}' exists in multiple constituents and is private in some.
TS18033: Only numeric enums can have computed members, but this expression has type '{0}'. If you do not need exhaustiveness checks, consider using an object literal instead.
TS18034: Specify the JSX fragment factory function to use when targeting 'react' JSX emit with 'jsxFactory' compiler option is specified, e.g. 'Fragment'.
TS18035: Invalid value for 'jsxFragmentFactory'. '{0}' is not a valid identifier or qualified-name.
TS18036: Class decorators can't be used with static private identifier. Consider removing the experimental decorator.
TS18037: Await expression cannot be used inside a class static block.
TS18038: 'For await' loops cannot be used inside a class static block.
TS18039: Invalid use of '{0}'. It cannot be used inside a class static block.
TS18041: A 'return' statement cannot be used inside a class static block.

You can view the complete results here.

Answer 4

I created a custom script to extract a basic reference table from the official TypeScript repository:

$ curl -sL https://github.com/microsoft/TypeScript/raw/v4.7.3/src/compiler/diagnosticMessages.json | jq -r 'to_entries[]|"TS\(.value.code): \(.key)"'

Here is the generated output:

TS1002: Unterminated string literal.
TS1003: Identifier expected.
TS1005: '{0}' expected.
TS1006: A file cannot have a reference to itself.
TS1007: The parser expected to find a '{1}' to match the '{0}' token here.
TS1009: Trailing comma not allowed.
TS1010: '*/' expected.
TS1011: An element access expression should take an argument.
TS1012: Unexpected token.
TS1013: A rest parameter or binding pattern may not have a trailing comma.
TS1014: A rest parameter must be last in a parameter list.
TS1015: Parameter cannot have question mark and initializer.
TS1016: A required parameter cannot follow an optional parameter.
TS1017: An index signature cannot have a rest parameter.
TS1018: An index signature parameter cannot have an accessibility modifier.
TS1019: An index signature parameter cannot have a question mark.
TS1020: An index signature parameter cannot have an initializer.
...
TS18012: '#constructor' is a reserved word.
TS18013: Property '{0}' is not accessible outside class '{1}' because it has a private identifier.
TS18014: The property '{0}' cannot be accessed on type '{1}' within this class because it is shadowed by another private identifier with the same spelling.
TS18015: Property '{0}' in type '{1}' refers to a different member that cannot be accessed from within type '{2}'.
TS18016: Private identifiers are not allowed outside class bodies.
TS18017: The shadowing declaration of '{0}' is defined here
TS18018: The declaration of '{0}' that you probably intended to use is defined here
TS18019: '{0}' modifier cannot be used with a private identifier.
TS18024: An enum member cannot be named with a private identifier.
TS18026: '#!' can only be used at the start of a file.
TS18027: Compiler reserves name '{0}' when emitting private identifier downlevel.
TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.
TS18029: Private identifiers are not allowed in variable declarations.
TS18030: An optional chain cannot contain private identifiers.
TS18031: The intersection '{0}' was reduced to 'never' because property '{1}' has conflicting types in some constituents.
TS18032: The intersection '{0}' was reduced to 'never' because property '{1}' exists in multiple constituents and is private in some.
TS18033: Only numeric enums can have computed members, but this expression has type '{0}'. If you do not need exhaustiveness checks, consider using an object literal instead.
TS18034: Specify the JSX fragment factory function to use when targeting 'react' JSX emit with 'jsxFactory' compiler option is specified, e.g. 'Fragment'.
TS18035: Invalid value for 'jsxFragmentFactory'. '{0}' is not a valid identifier or qualified-name.
TS18036: Class decorators can't be used with static private identifier. Consider removing the experimental decorator.
TS18037: Await expression cannot be used inside a class static block.
TS18038: 'For await' loops cannot be used inside a class static block.
TS18039: Invalid use of '{0}'. It cannot be used inside a class static block.
TS18041: A 'return' statement cannot be used inside a class static block.

You can view the complete results here.

Comprehensive compilation of Typescript error codes along with solutions

Answer №1

Answer №2

Similar questions

Retain annotations for assigned types in d.ts files

Learn how to manually trigger the opening of ngx-popover in Angular 2

Is it recommended to include modules in the Imports section of SharedModule in Angular?

The Angular/Typescript framework encountered an issue when trying to locate a differ that can handle an object of type 'object'. NgFor is limited to binding with Iterables like Arrays and is not compatible with plain objects

Guide to including spinner in React JS with TypeScript

typescript set x and y values to specific coordinates

Error: A stream was expected, but instead you provided an object that is invalid. Acceptable options include an Observable, Promise, Array, or Iterable

Encountering an issue with importing a component in a mixin in NuxtJS

How can one use TypeScript to return a subclass instance within a static function of a base class?

Transferring a JSON file between components within Angular 6 utilizing a service

What could be causing my SectionList to occasionally display only a single section?

Combining Two Dropdown Selections to Create a Unique Name using Angular

Dealing with Errors in Angular 5 using Observables: Why Observable.throw isn't working

After performing the `ng build --prod` command in Angular 4, deep linking functionality may not

Angular 5: Utilizing distinct router-outlets in separate modules for optimized lazy loading experience

Issue with incorrect inference of TextField `helperText` when using Formik with Material-UI

Using Angular 2 to Bind a Single Click Event to Multiple Elements

Nest.js: initializing properties from a superclass in a controller

typescript loop with a callback function executed at the conclusion

Exploring LocalStorage Monitoring in Vue.js 2