Change the TypeScript Level type to be a union instead of enum

Fixes #373
Fixes #382

index.d.ts

@@ -1,25 +1,3 @@
-declare const enum LevelEnum {
-	/**
-	All colors disabled.
-	*/
-	None = 0,
-
-	/**
-	Basic 16 colors support.
-	*/
-	Basic = 1,
-
-	/**
-	ANSI 256 colors support.
-	*/
-	Ansi256 = 2,
-
-	/**
-	Truecolor 16 million colors support.
-	*/
-	TrueColor = 3
-}
-
 /**
 Basic foreground colors.
 
@@ -89,12 +67,26 @@ declare type Modifiers =
 	| 'visible';
 
 declare namespace chalk {
-	type Level = LevelEnum;
+	/**
+	Levels:
+	- `0` - All colors disabled.
+	- `1` - Basic 16 colors support.
+	- `2` - ANSI 256 colors support.
+	- `3` - Truecolor 16 million colors support.
+	*/
+	type Level = 0 | 1 | 2 | 3;
 
 	interface Options {
 		/**
 		Specify the color support for Chalk.
+
 		By default, color support is automatically detected based on the environment.
+
+		Levels:
+		- `0` - All colors disabled.
+		- `1` - Basic 16 colors support.
+		- `2` - ANSI 256 colors support.
+		- `3` - Truecolor 16 million colors support.
 		*/
 		level?: Level;
 	}
@@ -161,7 +153,14 @@ declare namespace chalk {
 
 		/**
 		The color support for Chalk.
+
 		By default, color support is automatically detected based on the environment.
+
+		Levels:
+		- `0` - All colors disabled.
+		- `1` - Basic 16 colors support.
+		- `2` - ANSI 256 colors support.
+		- `3` - Truecolor 16 million colors support.
 		*/
 		level: Level;
 
@@ -400,7 +399,7 @@ This simply means that `chalk.red.yellow.green` is equivalent to `chalk.green`.
 */
 declare const chalk: chalk.Chalk & chalk.ChalkFunction & {
 	supportsColor: chalk.ColorSupport | false;
-	Level: typeof LevelEnum;
+	Level: chalk.Level;
 	Color: Color;
 	ForegroundColor: ForegroundColor;
 	BackgroundColor: BackgroundColor;

index.test-d.ts

@@ -4,12 +4,6 @@ import chalk = require('.');
 // - Helpers -
 type colorReturn = chalk.Chalk & {supportsColor?: never};
 
-// - Level -
-expectType<number>(chalk.Level.None);
-expectType<number>(chalk.Level.Basic);
-expectType<number>(chalk.Level.Ansi256);
-expectType<number>(chalk.Level.TrueColor);
-
 // - supportsColor -
 expectType<chalk.ColorSupport | false>(chalk.supportsColor);
 expectType<boolean>((chalk.supportsColor as chalk.ColorSupport).hasBasic);

source/index.js

@@ -218,16 +218,4 @@ chalk.supportsColor = stdoutColor;
 chalk.stderr = Chalk({level: stderrColor ? stderrColor.level : 0}); // eslint-disable-line new-cap
 chalk.stderr.supportsColor = stderrColor;
 
-// For TypeScript
-chalk.Level = {
-	None: 0,
-	Basic: 1,
-	Ansi256: 2,
-	TrueColor: 3,
-	0: 'None',
-	1: 'Basic',
-	2: 'Ansi256',
-	3: 'TrueColor'
-};
-
 module.exports = chalk;

test/level.js

@@ -43,15 +43,3 @@ test('disable colors if they are not supported', async t => {
 	const {stdout} = await execa.node(path.join(__dirname, '_fixture'));
 	t.is(stdout, 'testout testerr');
 });
-
-test('chalk.Level enum object', t => {
-	const {Level} = chalk;
-	t.is(Level.None, 0);
-	t.is(Level.Basic, 1);
-	t.is(Level.Ansi256, 2);
-	t.is(Level.TrueColor, 3);
-	t.is(Level[Level.None], 'None');
-	t.is(Level[Level.Basic], 'Basic');
-	t.is(Level[Level.Ansi256], 'Ansi256');
-	t.is(Level[Level.TrueColor], 'TrueColor');
-});