Ignore empty answers.

README.md

@@ -1,10 +1,13 @@
 Simple Flashcards takes a set of text values, one value per line, and shows
 them to the user one at a time. It has the following features:
 
-* Configurable timing between cards.
+* Support for prompts only or prompts and answers.
+* Image URLs can be used as values for pictoral flashcards.
+* Configurable timing between cards and answers.
 * Configurable size of the text (small, medium, and large).
 * In-order, reverse-order, and random-order traversal of the cards.
 * Support for saving/loading settings and inputs (locally to the browser).
 * Support for importing/exporting saved card sets as a file.
+* Support for importing saved card sets from a URL.
 
 Simple Flashcards is available at http://flashcards.jdbernard.com

flashcards.js

@@ -127,13 +127,15 @@
     const promptDiv = document.createElement("div");
     promptDiv.classList.add('prompt');
     promptDiv.innerHTML = FC.transformContent(item.prompt);
-
-    const answerDiv = document.createElement("div");
-    answerDiv.classList.add('answer');
-    answerDiv.innerHTML = FC.transformContent(item.answer);
-
     newCardDiv.appendChild(promptDiv);
-    newCardDiv.appendChild(answerDiv);
+
+    if (item.answer) {
+      const answerDiv = document.createElement("div");
+      answerDiv.classList.add('answer');
+      answerDiv.innerHTML = FC.transformContent(item.answer);
+      newCardDiv.appendChild(answerDiv);
+    }
+
     return newCardDiv;
   };
 
@@ -272,6 +274,8 @@
   };
 
   FC.importCardSetFromURL = function(ev) {
+    ev.preventDefault();
+
     fetch(FC.$('input[name=importURL]').value)
     .then(resp => resp.json())
     .then(set => {