cache isArray, test for automatic casting

source/index.js

@@ -6,6 +6,8 @@ const {
 	stringEncaseCRLFWithFirstIndex
 } = require('./util');
 
+const {isArray} = Array;
+
 // `supportsColor.level` → `ansiStyles.color[name]` mapping
 const levelMapping = [
 	'ansi',
@@ -134,7 +136,7 @@ const createStyler = (open, close, parent) => {
 
 const createBuilder = (self, _styler, _isEmpty) => {
 	const builder = (...arguments_) => {
-		if (Array.isArray(arguments_[0])) {
+		if (isArray(arguments_[0]) && isArray(arguments_[0].raw)) {
 			// Called as a template literal, for example: chalk.red`2 + 3 = {bold ${2+3}}`
 			return applyStyle(builder, chalkTag(builder, ...arguments_));
 		}
@@ -193,7 +195,7 @@ let template;
 const chalkTag = (chalk, ...strings) => {
 	const [firstString] = strings;
 
-	if (!Array.isArray(firstString)) {
+	if (!isArray(firstString) || !isArray(firstString.raw)) {
 		// If chalk() was called by itself or with a string,
 		// return the string itself as a string.
 		return strings.join(' ');

test/chalk.js

@@ -16,6 +16,14 @@ test('support multiple arguments in base function', t => {
 	t.is(chalk('hello', 'there'), 'hello there');
 });
 
+test('support automatic casting to string', t => {
+	t.is(chalk(['hello', 'there']), 'hello,there');
+	t.is(chalk(123), '123');
+
+	t.is(chalk.bold(['foo', 'bar']), '\u001B[1mfoo,bar\u001B[22m');
+	t.is(chalk.green(98765), '\u001B[32m98765\u001B[39m');
+});
+
 test('style string', t => {
 	t.is(chalk.underline('foo'), '\u001B[4mfoo\u001B[24m');
 	t.is(chalk.red('foo'), '\u001B[31mfoo\u001B[39m');

test/template-literal.js

@@ -42,6 +42,11 @@ test('correctly perform nested template substitutions', t => {
 
 	t.is(instance.strikethrough.cyanBright.bgBlack`Works with {reset {bold numbers}} {bold.red ${1}}`,
 		instance.strikethrough.cyanBright.bgBlack('Works with ' + instance.reset.bold('numbers') + ' ' + instance.bold.red(1)));
+
+	t.is(chalk.bold`Also works on the shared {bgBlue chalk} object`,
+		'\u001B[1mAlso works on the shared \u001B[1m' +
+		'\u001B[44mchalk\u001B[49m\u001B[22m' +
+		'\u001B[1m object\u001B[22m');
 });
 
 test('correctly parse and evaluate color-convert functions', t => {