Jump to content

hide or show buttons


dodgeitorelse3
Go to solution Solved by dodgeitorelse3,

Recommended Posts

I have found some code online to make flip pages (a book if you will).

I am trying to hide the previous button before the book is opened or the next button when end of book is reached.

index.html is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Book</title>
    <link rel="stylesheet" href="./style.css">
    <script src="./main.js" defer></script>
    <script src="https://kit.fontawesome.com/b0f29e9bfe.js" crossorigin="anonymous"></script>
</head>
<body>
    <!-- Previous Button -->
    <button id="prev-btn">
        <i class="fas fa-arrow-circle-left"></i>
    </button>


    <!-- Book -->
    <div id="book" class="book">
        <!-- Paper 1 -->
        <div id="p1" class="paper">
            <div class="front">
                <div id="f1" class="front-content">
                    <h1>Front 1</h1>
                </div>
            </div>
            <div class="back">
                <div id="b1" class="back-content">
                    <h1>Back 1</h1>
                </div>
            </div>
        </div>
        <!-- Paper 2 -->
        <div id="p2" class="paper">
            <div class="front">
                <div id="f2" class="front-content">
                    <h1>Front 2</h1>
                </div>
            </div>
            <div class="back">
                <div id="b2" class="back-content">
                    <h1>Back 2</h1>
                </div>
            </div>
        </div>
        <!-- Paper 3 -->
        <div id="p3" class="paper">
            <div class="front">
                <div id="f3" class="front-content">
                    <h1>Front 3</h1>
                </div>
            </div>
            <div class="back">
                <div id="b3" class="back-content">
                    <h1>Back 3</h1>
                </div>
            </div>
        </div>
    </div>

    <!-- Next Button -->
    <button id="next-btn">
        <i class="fas fa-arrow-circle-right"></i>
    </button>
</body>
</html>

main.js is as follows:

// References to DOM Elements
const prevBtn = document.querySelector("#prev-btn");
const nextBtn = document.querySelector("#next-btn");
const book = document.querySelector("#book");

const paper1 = document.querySelector("#p1");
const paper2 = document.querySelector("#p2");
const paper3 = document.querySelector("#p3");

// Event Listener
prevBtn.addEventListener("click", goPrevPage);
nextBtn.addEventListener("click", goNextPage);

// Business Logic
let currentLocation = 1;
let numOfPapers = 3;
let maxLocation = numOfPapers + 1;

//start hide or show previous and next buttons
if(currentState == 1){
	prevBtn.style.display = "none"; 
	nextBtn.style.display = "inline";
}else if(currentState == 4){
	prevBtn.style.display = "inline"; 
	nextBtn.style.display = "none"; 
}else{
	prevBtn.style.display = "inline"; 
	nextBtn.style.display = "inline"; 
}
//end hide or show previous and next buttons

function openBook() {
    book.style.transform = "translateX(50%)";
    prevBtn.style.transform = "translateX(-180px)";
    nextBtn.style.transform = "translateX(180px)";
}

function closeBook(isAtBeginning) {
    if(isAtBeginning) {
        book.style.transform = "translateX(0%)";
    } else {
        book.style.transform = "translateX(100%)";
    }
    
    prevBtn.style.transform = "translateX(0px)";
    nextBtn.style.transform = "translateX(0px)";
}

function goNextPage() {
    if(currentLocation < maxLocation) {
        switch(currentLocation) {
            case 1:
                openBook();
                paper1.classList.add("flipped");
                paper1.style.zIndex = 1;
                break;
            case 2:
                paper2.classList.add("flipped");
                paper2.style.zIndex = 2;
                break;
            case 3:
                paper3.classList.add("flipped");
                paper3.style.zIndex = 3;
                closeBook(false);
                break;
            default:
                throw new Error("unkown state");
        }
        currentLocation++;
    }
}

function goPrevPage() {
    if(currentLocation > 1) {
        switch(currentLocation) {
            case 2:
                closeBook(true);
                paper1.classList.remove("flipped");
                paper1.style.zIndex = 3;
                break;
            case 3:
                paper2.classList.remove("flipped");
                paper2.style.zIndex = 2;
                break;
            case 4:
                openBook();
                paper3.classList.remove("flipped");
                paper3.style.zIndex = 1;
                break;
            default:
                throw new Error("unkown state");
        }

        currentLocation--;
    }
}

My attempt is in the main.js file starting at line #19.

Any help would be greatly appreciated.

Link to comment
Share on other sites

  • Solution

I have solved my issue.

In index.html I changed the previous button to display:none

<!-- Previous Button -->
    <button id="prev-btn" style="display:none;">
        <i class="fas fa-arrow-circle-left"></i>
    </button>

And then in main.js I added

if(currentState == 1){
	prevBtn.style.display = "none";
}

underneath the Business Logic section. I also add the display inline or none in 2 places in each of the goNextPage function and the goPrevPage function so they now look like this:

function goNextPage() {
    if(currentLocation < maxLocation) {
        switch(currentLocation) {
            case 1:
                openBook();
                prevBtn.style.display = "inline";
				paper1.classList.add("flipped");
                paper1.style.zIndex = 1;
                break;
            case 2:
                paper2.classList.add("flipped");
                paper2.style.zIndex = 2;
                break;
            case 3:
                nextBtn.style.display = "none";
				paper3.classList.add("flipped");
                paper3.style.zIndex = 3;
                closeBook(false);
                break;
            default:
                throw new Error("unkown state");
        }
        currentLocation++;
    }
}

function goPrevPage() {
    if(currentLocation > 1) {
        switch(currentLocation) {
            case 2:
                closeBook(true);
                prevBtn.style.display = "none";
				paper1.classList.remove("flipped");
                paper1.style.zIndex = 3;
                break;
            case 3:
                paper2.classList.remove("flipped");
                paper2.style.zIndex = 2;
                break;
            case 4:
                openBook();
                nextBtn.style.display = "inline";
				paper3.classList.remove("flipped");
                paper3.style.zIndex = 1;
                break;
            default:
                throw new Error("unkown state");
        }

        currentLocation--;
    }
}

 

Link to comment
Share on other sites

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.