Enable strictNullChecks

types/js-yaml/index.d.ts

@@ -7,7 +7,7 @@
 export function safeLoad(str: string, opts?: LoadOptions): any;
 export function load(str: string, opts?: LoadOptions): any;
 
-export class Type implements TypeConstructorOptions {
+export class Type {
 	constructor(tag: string, opts?: TypeConstructorOptions);
 	kind: 'sequence' | 'scalar' | 'mapping' | null;
 	resolve(data: any): boolean;

types/js-yaml/js-yaml-tests.ts

@@ -87,19 +87,19 @@ dumpOpts = {
 // $ExpectType Type
 new yaml.Type(str, typeConstructorOptions);
 
-// $ExpectType "sequence" | "scalar" | "mapping"
+// $ExpectType "sequence" | "scalar" | "mapping" | null
 type.kind;
 // $ExpectType (data: any) => boolean
 type.resolve;
 // $ExpectType (data: any) => any
 type.construct;
-// $ExpectType object
+// $ExpectType object | null
 type.instanceOf;
-// $ExpectType string
+// $ExpectType string | null
 type.predicate;
-// $ExpectType ((data: object) => any) | { [x: string]: (data: object) => any; }
+// $ExpectType ((data: object) => any) | { [x: string]: (data: object) => any; } | null
 type.represent;
-// $ExpectType string
+// $ExpectType string | null
 type.defaultStyle;
 // $ExpectType { [x: string]: any; }
 type.styleAliases;

types/js-yaml/tsconfig.json

@@ -6,7 +6,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
-        "strictNullChecks": false,
+        "strictNullChecks": true,
         "strictFunctionTypes": true,
         "baseUrl": "../",
         "typeRoots": [
@@ -20,4 +20,4 @@
         "index.d.ts",
         "js-yaml-tests.ts"
     ]
-}
+}