CODEWITHSUNDEEP
javascriptphphtml
Flicks Gorger
Flicks Gorger

Reputation: 305

Javascript image upload and display

My basic task is select image and display it,without saving it in database.

For this

1.I have made a select tag in html,through which I can upload the image.

2.I have made a blank image tag in which at there is no image source,alternate is upload image.

3.select tag has onchange javascript event handler which calls javascript function changeimage.

<script>
       function changeimage()
       {
            document.form_name.imagetag.src=document.form_name.filetag.value;
       }
</script>

In above Code

form_name : Is the name of my form 

<form name = "form_name">

imagetag : Is the name of my Img tag

<Img src=" " name = "imagetag">

filetag : Is the name of my 

<input type="file" name = "filetag" onchange="changeimage()">

I have save file using php extension.And when I try to print the value of filetag it shows "C:\fakepath\image.png",display this address for all image. I have save my php file in www location.

I am using window 7,wamp server and chrome latest version.

Upvotes: 9

Views: 28406

Answers (3)

Shivam Pandey
Shivam Pandey

Reputation: 1

You need one input tag to upload file and a image tag to render on the site.

The HTML and Javascript should look like

const renderFile = () => {
  const render = document.querySelector('img')
  const file = document.querySelector('input[type=file]').files[0]
  const reader = new FileReader();
  
  
  reader.addEventListener('load' , ()=> {
    render.src = reader.result;
  }, false)

  if(file){
    reader.readAsDataURL(file);
  }
}
<input type = 'file' onchange = 'renderFile()' >
<br>
<br>
<img src = "" alt='rendered image' id='rendered-image'  >

Simply on every upload the web page will show the image uploaded You can Style the height and width of the image according to the need

Upvotes: 0

Ishaan
Ishaan

Reputation: 1340

You can also use the Image() constructor. It creates a new HTML Image Element.

Example - 

document.getElementById("filetag").addEventListener("change", function(e) {

  let newImg = new Image(width, height);

  // Equivalent to above -> let newImg = document.createElement("img");

  newImg.src = e.target.files[0];
  newImg.src = URL.createObjectURL(e.target.files[0]);

  output.appendChild(newImg);
});

Reference - https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/Image

Upvotes: 2

Carl Edwards
Carl Edwards

Reputation: 14474

You may want to checkout this solution (where my code derives from). It involves a little bit of jQuery but if you truly must write it out in pure JS, here you go.

Note: I modified your tags to conform to the JS below. Also try to stay away from writing any inline scripts. Always good to keep your HTML and JS loosely coupled.

var fileTag = document.getElementById("filetag"),
    preview = document.getElementById("preview");
    
fileTag.addEventListener("change", function() {
  changeImage(this);
});

function changeImage(input) {
  var reader;

  if (input.files && input.files[0]) {
    reader = new FileReader();

    reader.onload = function(e) {
      preview.setAttribute('src', e.target.result);
    }

    reader.readAsDataURL(input.files[0]);
  }
}
<input type="file" id="filetag">
<img src="" id="preview">

Upvotes: 15

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