[fix] ES5 Object.keys only accepts an object

Author: ljharb

src/lib/es2015.core.d.ts

@@ -298,6 +298,12 @@ interface ObjectConstructor {
      */
     getOwnPropertySymbols(o: any): symbol[];
 
+    /**
+      * Returns the names of the enumerable string properties and methods of an object.
+      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+      */
+    keys(o: {}): string[];
+
     /**
      * Returns true if the values are the same value, false otherwise.
      * @param value1 The first value.

src/lib/es5.d.ts

@@ -235,7 +235,7 @@ interface ObjectConstructor {
     isExtensible(o: any): boolean;
 
     /**
-      * Returns the names of the enumerable properties and methods of an object.
+      * Returns the names of the enumerable string properties and methods of an object.
       * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
       */
     keys(o: {}): string[];

tests/baselines/reference/contextualExpressionTypecheckingDoesntBlowStack.symbols

@@ -21,9 +21,9 @@ export default class Operation {
 
         for(const parameterLocation of Object.keys(parameterValues)) {
 >parameterLocation : Symbol(parameterLocation, Decl(contextualExpressionTypecheckingDoesntBlowStack.ts, 8, 17))
->Object.keys : Symbol(ObjectConstructor.keys, Decl(lib.es5.d.ts, --, --))
+>Object.keys : Symbol(ObjectConstructor.keys, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --))
 >Object : Symbol(Object, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
->keys : Symbol(ObjectConstructor.keys, Decl(lib.es5.d.ts, --, --))
+>keys : Symbol(ObjectConstructor.keys, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --))
 >parameterValues : Symbol(parameterValues, Decl(contextualExpressionTypecheckingDoesntBlowStack.ts, 6, 23))
 
             const parameter: any = (this as any).getParameter();;

tests/baselines/reference/contextualExpressionTypecheckingDoesntBlowStack.types

@@ -21,9 +21,9 @@ export default class Operation {
         for(const parameterLocation of Object.keys(parameterValues)) {
 >parameterLocation : string
 >Object.keys(parameterValues) : string[]
->Object.keys : (o: {}) => string[]
+>Object.keys : { (o: object): string[]; (o: {}): string[]; }
 >Object : ObjectConstructor
->keys : (o: {}) => string[]
+>keys : { (o: object): string[]; (o: {}): string[]; }
 >parameterValues : any
 
             const parameter: any = (this as any).getParameter();;

tests/baselines/reference/genericIndexedAccessMethodIntersectionCanBeAccessed.types

@@ -32,9 +32,9 @@ export const createService = <T>(
 >Object.keys(ServiceCtr).forEach(key => {        const method = (ServiceCtr)[key as keyof T];        const {__$daemonMode, __$action, id} = method;    }) : void
 >Object.keys(ServiceCtr).forEach : (callbackfn: (value: string, index: number, array: string[]) => void, thisArg?: any) => void
 >Object.keys(ServiceCtr) : string[]
->Object.keys : (o: {}) => string[]
+>Object.keys : (o: object) => string[]
 >Object : ObjectConstructor
->keys : (o: {}) => string[]
+>keys : (o: object) => string[]
 >ServiceCtr : ExtendedService<T> & Service<T>
 >forEach : (callbackfn: (value: string, index: number, array: string[]) => void, thisArg?: any) => void
 >key => {        const method = (ServiceCtr)[key as keyof T];        const {__$daemonMode, __$action, id} = method;    } : (key: string) => void

tests/baselines/reference/literalTypeWidening.types

@@ -391,9 +391,9 @@ export function keys<K extends string, V>(obj: Record<K, V>): K[] {
   return Object.keys(obj) as K[]
 >Object.keys(obj) as K[] : K[]
 >Object.keys(obj) : string[]
->Object.keys : (o: {}) => string[]
+>Object.keys : (o: object) => string[]
 >Object : ObjectConstructor
->keys : (o: {}) => string[]
+>keys : (o: object) => string[]
 >obj : Record<K, V>
 }
 

tests/baselines/reference/recursiveTypeRelations.types

@@ -72,9 +72,9 @@ export function css<S extends { [K in keyof S]: string }>(styles: S, ...classNam
 >Object.keys(arg).reduce<ClassNameObject>((obj: ClassNameObject, key: keyof S) => {        const exportedClassName = styles[key];        obj[exportedClassName] = (arg as ClassNameMap<S>)[key];         return obj;      }, {}) : any
 >Object.keys(arg).reduce : { (callbackfn: (previousValue: string, currentValue: string, currentIndex: number, array: string[]) => string): string; (callbackfn: (previousValue: string, currentValue: string, currentIndex: number, array: string[]) => string, initialValue: string): string; <U>(callbackfn: (previousValue: U, currentValue: string, currentIndex: number, array: string[]) => U, initialValue: U): U; }
 >Object.keys(arg) : string[]
->Object.keys : (o: {}) => string[]
+>Object.keys : (o: object) => string[]
 >Object : ObjectConstructor
->keys : (o: {}) => string[]
+>keys : (o: object) => string[]
 >arg : ClassNameObjectMap<S>
 >reduce : { (callbackfn: (previousValue: string, currentValue: string, currentIndex: number, array: string[]) => string): string; (callbackfn: (previousValue: string, currentValue: string, currentIndex: number, array: string[]) => string, initialValue: string): string; <U>(callbackfn: (previousValue: U, currentValue: string, currentIndex: number, array: string[]) => U, initialValue: U): U; }
 >(obj: ClassNameObject, key: keyof S) => {        const exportedClassName = styles[key];        obj[exportedClassName] = (arg as ClassNameMap<S>)[key];         return obj;      } : (obj: any, key: keyof S) => any

tests/baselines/reference/taggedTemplateStringsWithOverloadResolution3_ES6.errors.txt

@@ -89,7 +89,7 @@ tests/cases/conformance/es6/templates/taggedTemplateStringsWithOverloadResolutio
     fn5 `${ (n) => n.toFixed() }`; // will error; 'n' should have type 'string'.
                      ~~~~~~~
 !!! error TS2551: Property 'toFixed' does not exist on type 'string'. Did you mean 'fixed'?
-!!! related TS2728 /.ts/lib.es2015.core.d.ts:466:5: 'fixed' is declared here.
+!!! related TS2728 /.ts/lib.es2015.core.d.ts:472:5: 'fixed' is declared here.
     fn5 `${ (n) => n.substr(0) }`;