New big update

README.md

@@ -43,6 +43,8 @@ Parameters:
 --no - exclude "image", "stylesheet", "script", "font"  
 --click - example: ".selector>a" excellent way to close popups or to click some buttons on the page.  
 --file - output file name (optional, otherwise based on page title and timestamp)
+--theme - switch to dark or light color theme
+--vd - Emulate vision deficiency 'achromatopsia', 'deuteranopia', 'protanopia', 'tritanopia', 'blurredVision', and 'none'
 <p>
 
 <h4>Example: </h4>
@@ -75,6 +77,10 @@ screenshoteer --url https://www.economist.com/ --click ".ribbon__close-button"
 screenshoteer --url file:///Users/../index.html
 
 screenshoteer --url https://www.slashdot.org --file /tmp/slashdot.png
+
+screenshoteer --url https://mxb.dev/blog/color-theme-switcher/ --theme dark
+
+screenshoteer --url https://news.ycombinator.com --vd blurredVision
 ```
 <p> List of of supported mobile devices: https://github.com/GoogleChrome/puppeteer/blob/master/DeviceDescriptors.js
 </p>

index.js

@@ -18,6 +18,8 @@ program
     .option('--no, [no]', 'Exclude')
     .option('--click, [click]', 'Click')
     .option('--file, [file]', 'Output file')
+    .option('--theme, [theme]', 'Color Theme light or dark')
+    .option('--vd, [vd]', 'Emulate vision deficiency')
     .parse(process.argv);
 
 if (!program.url) {
@@ -58,6 +60,12 @@ console.log(program.fullPage);
       if (program.h && !program.fullpage) program.fullPage = false;
       await page.setViewport({width: Number(newWidth), height: Number(newHeight)})
     }
+    if (program.theme) {
+      await page.emulateMediaFeatures([{ name: 'prefers-color-scheme', value: program.theme }]);
+    }
+    if (program.vd) {
+      await page.emulateVisionDeficiency(program.vd);
+    }
     if (program.emulate)
       await page.emulate(devices[program.emulate]);
     else

package.json

@@ -1,17 +1,17 @@
 {
   "name": "screenshoteer",
-  "version": "1.0.9",
+  "version": "1.1.0",
   "description": "Make screenshots and device emulations form your terminal",
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "bin": {
-    "screenshoteer": "./index.js"
+    "screenshoteer": "index.js"
   },
   "dependencies": {
     "commander": "^2.19.0",
-    "puppeteer": "^1.10.0"
+    "puppeteer": "^4.00.0"
   },
   "keywords": [
     "screenshots",