Merge branch 'emulate_media' into 'main'

Emulate print media

See merge request !34

src/cli.js

@@ -41,6 +41,8 @@ program
 	collect, [])
 	.option("--browserEndpoint <browserEndpoint>", "Use a remote Chrome server with browserWSEndpoint")
 	.option("--browserArgs <browserArgs>", "Launch Chrome with comma separated args", commaSeparatedList)
+	.option("--media [media]", "Emulate \"print\" or \"screen\" media, defaults to print.")
+
 	.parse(process.argv);
 
 function collect(value, previous) {
@@ -115,7 +117,8 @@ if (typeof input === "string") {
 		additionalScripts: options.additionalScript,
 		browserEndpoint: options.browserEndpoint,
 		timeout: options.timeout,
-		browserArgs: options.browserArgs
+		browserArgs: options.browserArgs,
+		emulateMedia: options.media
 	};
 
 	if (options.forceTransparentBackground) {

src/printer.js

@@ -30,6 +30,7 @@ class Printer extends EventEmitter {
 		this.overrideDefaultBackgroundColor = options.overrideDefaultBackgroundColor;
 		this.timeout = options.timeout || 0;
 		this.closeAfter = typeof options.closeAfter !== "undefined" ? options.closeAfter : true;
+		this.emulateMedia = options.emulateMedia || "print";
 
 		this.pages = [];
 	}
@@ -73,6 +74,8 @@ class Printer extends EventEmitter {
 			const page = await this.browser.newPage();
 			page.setDefaultTimeout(this.timeout);
 
+			await page.emulateMediaType(this.emulateMedia);
+
 			if (this.overrideDefaultBackgroundColor) {
 				page._client.send("Emulation.setDefaultBackgroundColorOverride", { color: this.overrideDefaultBackgroundColor });
 			}