doc: utility type (#569)

Author: maafaishal

README.md

@@ -2654,13 +2654,18 @@ Conditional Types are a difficult topic to get around so here are some extra res
 
 ### Troubleshooting Handbook: Utilities
 
-These are all built in, [see source in es5.d.ts](https://github.com/microsoft/TypeScript/blob/2c458c0d1ccb96442bca9ce43aa987fb0becf8a9/src/lib/es5.d.ts#L1401-L1474):
+These are all built in, [see source in es5.d.ts](https://github.com/microsoft/TypeScript/blob/33a34e5b96bfe086266f4765ab9789a2a02507f9/src/lib/es5.d.ts#L1523-L1637):
 
+- `Awaited`: emulate the behavior of `await`
+- `Capitalize`: convert first character of string literal type to uppercase
 - `ConstructorParameters`: a tuple of class constructor's parameter types
 - `Exclude`: exclude a type from another type
 - `Extract`: select a subtype that is assignable to another type
 - `InstanceType`: the instance type you get from a `new`ing a class constructor
+- `Lowercase`: convert string literal type to lowercase
 - `NonNullable`: exclude `null` and `undefined` from a type
+- `Omit`: construct a type with the properties of another type.
+- `OmitThisParameter`: remove the 'this' parameter from a function type.
 - `Parameters`: a tuple of a function's parameter types
 - `Partial`: Make all properties in an object optional
 - `Readonly`: Make all properties in an object readonly
@@ -2669,6 +2674,10 @@ These are all built in, [see source in es5.d.ts](https://github.com/microsoft/Ty
 - `Record`: A map from a key type to a value type
 - `Required`: Make all properties in an object required
 - `ReturnType`: A function's return type
+- `ThisParameterType`: extract the type of the 'this' parameter of a function type
+- `ThisType`: marker for contextual 'this' type
+- `Uncapitalize`: convert first character of string literal type to lowercase
+- `Uppercase`: convert string literal type to uppercase
 
 <!--END-SECTION:utilities-->
 

docs/basic/troubleshooting/utilities.md

@@ -4,13 +4,18 @@ title: "Troubleshooting Handbook: Utilities"
 sidebar_label: Utilities
 ---
 
-These are all built in, [see source in es5.d.ts](https://github.com/microsoft/TypeScript/blob/2c458c0d1ccb96442bca9ce43aa987fb0becf8a9/src/lib/es5.d.ts#L1401-L1474):
+These are all built in, [see source in es5.d.ts](https://github.com/microsoft/TypeScript/blob/33a34e5b96bfe086266f4765ab9789a2a02507f9/src/lib/es5.d.ts#L1523-L1637):
 
+- `Awaited`: emulate the behavior of `await`
+- `Capitalize`: convert first character of string literal type to uppercase
 - `ConstructorParameters`: a tuple of class constructor's parameter types
 - `Exclude`: exclude a type from another type
 - `Extract`: select a subtype that is assignable to another type
 - `InstanceType`: the instance type you get from a `new`ing a class constructor
+- `Lowercase`: convert string literal type to lowercase
 - `NonNullable`: exclude `null` and `undefined` from a type
+- `Omit`: construct a type with the properties of another type.
+- `OmitThisParameter`: remove the 'this' parameter from a function type.
 - `Parameters`: a tuple of a function's parameter types
 - `Partial`: Make all properties in an object optional
 - `Readonly`: Make all properties in an object readonly
@@ -19,3 +24,7 @@ These are all built in, [see source in es5.d.ts](https://github.com/microsoft/Ty
 - `Record`: A map from a key type to a value type
 - `Required`: Make all properties in an object required
 - `ReturnType`: A function's return type
+- `ThisParameterType`: extract the type of the 'this' parameter of a function type
+- `ThisType`: marker for contextual 'this' type
+- `Uncapitalize`: convert first character of string literal type to lowercase
+- `Uppercase`: convert string literal type to uppercase