Feedback I would love to hear: Since this is really my first real JavaScript app, being that I can never find a project I want to actually work on, I want to know how I can improve my JS techniques. Am I doing a good job separating logic? Am I using good techniques? Should I completely forget about vanilla JS and just go straight into using Jquery or other libraries? Is it good that I used the card manager as a literal? Anything and everything! I'd even appreciate some feedback on how I setup the html or if you would set it up a different way!

Any how, this is a snippet of what I have written so far, and you can find the source at https://ide.c9.io/lemony_andrew/flashcardapp
Here's the working demonstration: https://flashcardapp-lemony-andrew.c9.io/flashcard.html


    <div id="newCards" >
            Front:<input type="text" id="newFront" name="front"/>
            Back: <input type="text" id="newBack" name="back"/>
            <input value="Add" type="button" onclick="userEnter();"/>

    <center><h1>French Demonstration</h1></center>

    <div id="cardButton" ><p id="cardText"></p></div>

    <p align="center">
        <input type="button" id="prevCard" value="previous" onclick="cardsHandle.cardMove(-1);"/>
        <span id="positionIndex">0/0</span>
        <input type="button" id="nextCard" value="next" onclick="cardsHandle.cardMove(1);"/>

        String.prototype.isEmpty = function() {// Returns if a string has only whitespace
            return (this.length === 0 || !this.trim());

        function Card(front, back){
            /*A card is just a container that holds a front and back value! 
                - You can get either back or front by displaying it*/
            this.frontVal = front;
            this.backVal = back;

            this.display = function(side){
                if( side === 0 ){
                    return this.frontVal;
                    return this.backVal;

        var cardsHandle = {
            cards: [],
            cardInd: 0,
            cardButton: document.getElementById("cardButton"),
            cardText: document.getElementById("cardText"),
            cardTPosition: document.getElementById("positionIndex"),
            cardSide: 0,

            cardAdd: function(back, front){
                this.cards.push( new Card(back, front) );
            cardUpdate: function(){
                var curCard = this.cards[ this.cardInd ];
                this.cardText.innerHTML = curCard.display( this.cardSide );
                this.cardTPosition.innerHTML = (this.cardInd+1)+"/"+this.cards.length;
            cardFlip: function(){
                this.cardSide = (this.cardSide + 1) % 2;
            cardMove: function(moveBy){
                this.cardInd += moveBy;
                if( this. cardInd < 0 ){
                    this.cardInd += this.cards.length;
                this.cardInd = this.cardInd % this.cards.length;

                this.cardSide = 0;// Set back to front
            cardTap: function(){
                this.cardUpdate();// Display card

        cardsHandle.cardAdd("Hello or Good bye","Salut");
        cardsHandle.cardAdd("Hello or Good Morning","Bonjour");
        cardsHandle.cardAdd("Good Night","Bonne nuit!");

        var userEnter = function(){
            var nFront = document.getElementById("newFront"),
                nBack = document.getElementById("newBack");

            if( nFront.value.isEmpty() || nBack.value.isEmpty() )


        cardsHandle.cardButton.addEventListener('click', function(){ cardsHandle.cardTap();} );



Program Overview: Basically I have 3 functions to my program. The container that just holds and displays the front and back values of a card. The second functionality is basically the card handler. It's purpose is basically to manage what is put on the screen, and how the index of cards is sorted/manipulated. The third functionality is simply having the user be able to add in cards.

Why I'm making this: I'm working on making a completely free and completely open-source flash-card web-app. The reason I'm making it is because I find that most flash card apps are not simple enough (just not enjoyable to work with), don't have a good folder (organizing) system, and are just not free. This is just the beginning of my application, and it will essentially be my first real JavaScript work. I don't normally use JavaScript, in fact it's been nearly 4 months since I touched it, so this is a good refresher for me and will hopefully be a part of my future portfolio. (I also hope it will be my foot in the door for bigger contributor communities like Github).



  • Don’t use the center element or the align attribute. Both are obsolete in HTML5. Use CSS instead (e.g., text-align:center;).

  • Use label elements for your form fields (except for the submit buttons), e.g.:

    <label for="newFront">Front:</label> <input type="text" id="newFront" name="newFront">
  • You could (i.e., it’s not required) use a fieldset to group the elements of the form for creating new flashcards, and give them a name (e.g., "Create new flashard").

  • You could use article for each flashcard.


  • Currently it doesn’t seem possible to use this web app with keyboard only. While you can create new flashards and navigate existing cards, you can’t reveal the back of a card. Possible solution: Add a "Flip" (or similar) button.

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