Code Inspections in TypeScript

Inspection	Description	Default Severity
Equality operator may cause type coercion	Reports usages of equality operators which may cause unexpected type coercions.It is considered a good practice to use the type-safe equality operators === and !==instead of their regular counterparts == and !=. Depending on the option selected, this will either highlight: All usages of == and != operators. All usages except comparison with null. Some code styles allow using x == null as a replacement for x === null \|\| x === undefined. Only suspicious expressions, such as: == or != comparisons to 0, '', null, true, false, or undefined.	Disabled
Type mismatch	Checks that TypeScript called function parameters, return values, assigned expressions are of the correct type.	Error
Type mismatch in 'any' type context	Checks TypeScript called function parameters, return values, assigned expressions to be of correct type in any type context.	Weak warning
Unresolved JavaScript variable	Checks that TypeScript referenced variables and fields are valid.	Weak warning
Validate imports	Validate TypeScript imports.	Error
Unresolved JavaScript function	Checks that TypeScript called functions are valid.	Weak warning
@private and @protected members accessibility	Checks that TypeScript private and protected members are visible in current context.	Weak warning
Import can be shortened	Reports ES6 imports whose from part can be shortened by importing the parent directory.	Warning
Reference to a UMD global	Report the use of references to a UMD global if the current file is a module.	Weak warning
Field is assigned only in the constructor and can be made readonly	If a private field is assigned only in the constructor, it can be made readonly.	Weak warning
Missing augmentation import	Checks that current file imports the augmentation module.	Info
Explicit member types	Highlights type declarations that do not match the current code style. By default, type declarations are highlighted as redundant when the type can be inferred from context, for example: `var pi: number = 3.14` Enabling any of the options below inverts this and suggests inserting an explicit type declaration even where the type can be inferred.	Info
Validate tsconfig.json	Validate usages of tsconfig.json properties.
Required TypeScript library is not included in tsconfig.json	Checks that the TypeScript library files required for the symbol are listed under the 'lib' compiler option in tsconfig.json.	Error
Suspicious parameter assignment in constructor	Warns against a common mistake in TypeScript code, when a class field is declared as a constructor parameter, and then this parameter is assigned. In this case, the corresponding field won't be assigned, only the local parameter value is modified.	Warning
Abstract class constructor can be made protected	Suggests to make the constructor of an abstract class protected (because it is useless to have it public).	Weak warning
TSLint	Runs TSLint - a linter for TypeScript. The highlighting is based on the rule severity specified in the TSLint configuration file.Uncheck "Use rule severity from the configuration file" to use the same severity configured in this inspection for all TSLint rules.	Disabled

Last modified: 11 June 2019