Add overwrite option

index.js

@@ -217,9 +217,12 @@ const captureWebsite = async (url, options) => {
 	return buffer;
 };
 
-module.exports.file = async (url, filePath, options) => {
+module.exports.file = async (url, filePath, options = {}) => {
 	const screenshot = await captureWebsite(url, options);
-	await writeFile(filePath, screenshot, {flag: 'wx'});
+
+	await writeFile(filePath, screenshot, {
+		flag: options.overwrite ? 'w' : 'wx'
+	});
 };
 
 module.exports.buffer = async (url, options) => captureWebsite(url, {...options, encoding: 'binary'});

readme.md

@@ -362,6 +362,15 @@ Options passed to [`puppeteer.launch()`](https://github.com/GoogleChrome/puppete
 
 Note: Some of the launch options are overridden by the `debug` option.
 
+##### overwrite
+
+Type: `boolean`<br>
+Default: `false`
+
+Overwrite the destination file if it exists instead of throwing an error.
+
+*This option applies only to `captureWebsite.file()`.*
+
 ### captureWebsite.devices
 
 Type: `string[]`

test.js

@@ -470,6 +470,23 @@ test('`authentication` option', async t => {
 	})));
 });
 
+test('`overwrite` option', async t => {
+	const filePath = tempy.file();
+
+	await t.notThrowsAsync(async () => {
+		await captureWebsite.file(server.url, filePath, {
+			width: 100,
+			height: 100
+		});
+
+		await captureWebsite.file(server.url, filePath, {
+			width: 100,
+			height: 100,
+			overwrite: true
+		});
+	});
+});
+
 test('handle redirects', async t => {
 	const server = await createTestServer();