Enlarge Image when clicking

Question

Enlarge Image when clicking

Navigation

#1 by (2 votes)

1

Cordial Greeting,

I hope you can help me with what I'm trying to do.

What I do is, I have an input of type file <input type"file"> and what it does is load an image and show the preview of the img, until here we go well, what I want to do later, is that the preview of the image when clicked, enlarges in full screen, like a modal or something.

I have a test with an image already with a route and it works perfectly, but just as I want it does not work.

Styles:

<style>
body {font-family: Arial, Helvetica, sans-serif;}

#myImg {
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}

#myImg:hover {opacity: 0.7;}

/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (image) */
.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
}

/* Caption of Modal Image */
#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
}

/* Add Animation */
.modal-content, #caption {    
    -webkit-animation-name: zoom;
    -webkit-animation-duration: 0.6s;
    animation-name: zoom;
    animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
    from {-webkit-transform:scale(0)} 
    to {-webkit-transform:scale(1)}
}

@keyframes zoom {
    from {transform:scale(0)} 
    to {transform:scale(1)}
}

/* The Close Button */
.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
    .modal-content {
        width: 100%;
    }
}
</style>

Script that makes the preview

<script type="text/javascript">

    $(window).load(function(){

 $(function() {
  $('#file-input').change(function(e) {
      addImage(e); 
     });

     function addImage(e){
      var file = e.target.files[0],
      imageType = /image.*/;

      if (!file.type.match(imageType))
       return;

      var reader = new FileReader();
      reader.onload = fileOnload;
      reader.readAsDataURL(file);
     }

     function fileOnload(e) {
      var result=e.target.result;
      $('#imgSalida').attr("src",result);
     }
    });
  });

</script>

   <input name="file-input" id="file-input" type="file" />
   <br />
   <img id="imgSalida" style="width:100%;max-width:300px" src="" />
   <div id="myModal2" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img012">
  <div id="caption2"></div>
</div>

Script that I use to click and enlarge:

<script>
// Get the modal
var modal = document.getElementById('myModal');

// Get the image and insert it inside the modal - use its "alt" text as a caption
var img = document.getElementById('myImg');
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
img.onclick = function(){
    modal.style.display = "block";
    modalImg.src = this.src;
    captionText.innerHTML = this.alt;
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
    modal.style.display = "none";
}
</script>

This way it does not work for me, but if I use an img by default if it works, but it is not the case.

I hope you understand what I want to do and can help me ..

Thanks in advance

javascript html css

asked by Andres Rodriguez 16.11.2018 в 18:02

source

1 answer

I will be able to do in my query a SELECT with a date range according to the current month Doubts about Error in javaScript,

score 2 · Accepted Answer

I think what you're trying to do is something like this? if you tell me and I make a version in jQuery! Greetings!

document.addEventListener('DOMContentLoaded', function () {
    const imgInput = document.getElementById('image');
    const container = document.querySelector('.container');
    const img = document.createElement('img');
    const plusButton = document.querySelector('.plus');
    const minusButton = document.querySelector('.minus');


    imgInput.addEventListener('change', setImage);
    plusButton.addEventListener('click', increaseSize);
    minusButton.addEventListener('click', reduceSize);
    img.addEventListener('click', fullScreen);


    function setImage() {
        img.file = this.files[0];
        img.classList.add('imageLoaded');
        container.appendChild(img);
        const reader = new FileReader();
        reader.onload = (function (img) {
            return function (e) {
                img.src = e.target.result;
            };
        })(img);
        reader.readAsDataURL(this.files[0]);
    }
    
    function increaseSize() {
        img.style.width = '${img.width += 100}px';
        img.style.height = '${img.height += 50}px';
    }

    function reduceSize() {
        if (img.width <= 100 || img.height <= 50) return;
        img.style.width = '${img.width -= 100}px';
        img.style.height = '${img.height -= 50}px';
    }
    
    function fullScreen() {
        if (this.width === window.innerWidth) {
            img.style.width = (window.innerWidth / 2) + "px";
        } else {
            img.style.width = window.innerWidth + "px";
        }
    }
});

body {
    margin: 0;
    padding: 0;
}

.container {
    margin: auto;
}

.imageLoaded {
    width: 50%;
    height: auto;
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
<input id="image" type="file" placeholder="Load an image">
<br>
<button class="plus">+</button>
<button class="minus">-</button>
<br>
<div class="container">

</div>

<script type="text/javascript" src="js/index.js"></script>
</body>
</html>