feat: add image formats

chrome.go

@@ -19,6 +19,7 @@ const (
 	scale                      string = "scale"
 	skipNetworkIdleEvent       string = "skipNetworkIdleEvent"
 	singlePage                 string = "singlePage"
+	format                     string = "format"
 )
 
 // nolint: gochecknoglobals
@@ -49,6 +50,13 @@ var (
 	LargeMargins = [4]float64{2, 2, 2, 2}
 )
 
+// nolint: gochecknoglobals
+var (
+	PNG  = "png"
+	JPEG = "jpeg"
+	WebP = "webp"
+)
+
 type chromeRequest struct {
 	header Document
 	footer Document
@@ -119,3 +127,11 @@ func (req *chromeRequest) SkipNetworkIdleEvent() {
 func (req *chromeRequest) SinglePage() {
 	req.values[singlePage] = "true"
 }
+
+// Format sets format form field
+func (req *chromeRequest) Format(format string) {
+	req.values[format] = format
+	if format == "" {
+		req.values[format] = JPEG
+	}
+}