Show images from urls

web/index.js

@@ -51,7 +51,7 @@ let collageUrlA
 
 let crops = [];
 let pageSize = "letter-landscape";
-const imageUrls = [
+let imageUrls = [
     , // images start with index 1
     "images/img1.jpg",
     "images/img2.jpg",
@@ -75,6 +75,8 @@ function main() {
     for(const tmpl of document.getElementsByClassName("template")) {
         tmpl.onclick = () => applyTemplate(tmpl)
     }
+    const queryUrls = loadImageUrlsFromQuery()
+    imageUrls = [,].concat(queryUrls)
 
     applyTemplate(document.getElementById("default_template"))
 }
@@ -210,4 +212,10 @@ function applyTemplate(templateDiv) {
     initCollage()
 }
 
+function loadImageUrlsFromQuery() {
+    const params = new URLSearchParams(window.location.search)
+    const urlsstr = params.get('urls')
+    return JSON.parse(urlsstr)
+}
+
 main()