Add space option

index.d.ts

@@ -56,6 +56,7 @@ export interface Options {
 
 	@default undefined
 
+	@example
 	```
 	import prettyBytes from 'pretty-bytes';
 
@@ -76,6 +77,7 @@ export interface Options {
 
 	@default undefined
 
+	@example
 	```
 	import prettyBytes from 'pretty-bytes';
 
@@ -88,6 +90,24 @@ export interface Options {
 	```
 	*/
 	readonly maximumFractionDigits?: number;
+
+	/**
+	Put a space between the number and unit.
+
+	@default true
+
+	@example
+	```
+	import prettyBytes from 'pretty-bytes';
+
+	prettyBytes(1920, {space: false});
+	//=> '1.9kB'
+
+	prettyBytes(1920);
+	//=> '1.92 kB'
+	```
+	*/
+	readonly space?: boolean;
 }
 
 /**

index.js

@@ -71,15 +71,18 @@ export default function prettyBytes(number, options) {
 	options = {
 		bits: false,
 		binary: false,
+		space: true,
 		...options,
 	};
 
 	const UNITS = options.bits
 		? (options.binary ? BIBIT_UNITS : BIT_UNITS)
 		: (options.binary ? BIBYTE_UNITS : BYTE_UNITS);
 
+	const separator = options.space ? ' ' : '';
+
 	if (options.signed && number === 0) {
-		return ` 0 ${UNITS[0]}`;
+		return ` 0${separator}${UNITS[0]}`;
 	}
 
 	const isNegative = number < 0;
@@ -101,7 +104,7 @@ export default function prettyBytes(number, options) {
 
 	if (number < 1) {
 		const numberString = toLocaleString(number, options.locale, localeOptions);
-		return prefix + numberString + ' ' + UNITS[0];
+		return prefix + numberString + separator + UNITS[0];
 	}
 
 	const exponent = Math.min(Math.floor(options.binary ? Math.log(number) / Math.log(1024) : Math.log10(number) / 3), UNITS.length - 1);
@@ -115,5 +118,5 @@ export default function prettyBytes(number, options) {
 
 	const unit = UNITS[exponent];
 
-	return prefix + numberString + ' ' + unit;
+	return prefix + numberString + separator + unit;
 }

index.test-d.ts

@@ -7,3 +7,4 @@ expectType<string>(prettyBytes(1337, {locale: 'de'}));
 expectType<string>(prettyBytes(1337, {locale: true}));
 expectType<string>(prettyBytes(1337, {bits: true}));
 expectType<string>(prettyBytes(1337, {binary: true}));
+expectType<string>(prettyBytes(1337, {space: true}));

readme.md

@@ -123,6 +123,23 @@ prettyBytes(1920);
 //=> '1.92 kB'
 ```
 
+##### space
+
+Type: `boolean`\
+Default: `true`
+
+Put a space between the number and unit.
+
+```js
+import prettyBytes from 'pretty-bytes';
+
+prettyBytes(1920, {space: false});
+//=> '1.9kB'
+
+prettyBytes(1920);
+//=> '1.92 kB'
+```
+
 ## Related
 
 - [pretty-bytes-cli](https://github.com/sindresorhus/pretty-bytes-cli) - CLI for this module

test.js

@@ -146,3 +146,14 @@ test('fractional digits options', t => {
 	t.is(prettyBytes(32_768, {minimumFractionDigits: 2, maximumFractionDigits: 3, binary: true}), '32.00 kiB');
 	t.is(prettyBytes(65_536, {minimumFractionDigits: 1, maximumFractionDigits: 3, binary: true}), '64.0 kiB');
 });
+
+test('space option', t => {
+	t.is(prettyBytes(0), '0 B');
+	t.is(prettyBytes(0, {space: false}), '0B');
+	t.is(prettyBytes(999), '999 B');
+	t.is(prettyBytes(999, {space: false}), '999B');
+	t.is(prettyBytes(-13, {signed: true}), '-13 B');
+	t.is(prettyBytes(-13, {signed: true, space: false}), '-13B');
+	t.is(prettyBytes(42, {signed: true}), '+42 B');
+	t.is(prettyBytes(42, {signed: true, space: false}), '+42B');
+});