Javascript ImagePreview
I need a preview of an image after it got upload via <input type="file onchange="readURL(this);">.
I have found a solution on the internet, but that doesn't work for me:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}
"#blah" is the ID of the image(it is shown with a placeholder at first).
The Error I get when opening the Console, after I uploaded an image : Uncaught ReferenceError: $ is not defined at FileReader.reader.onload ((index):156)
But it works here : https://codepen.io/mobifreaks/pen/LIbca
Please give me a short explanation why this doesn't work for me and the solution to it.
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/>javascript html image
edited Nov 20 '18 at 9:30
fiza khan
913419
add a comment |
I need a preview of an image after it got upload via <input type="file onchange="readURL(this);">.
I have found a solution on the internet, but that doesn't work for me:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}
"#blah" is the ID of the image(it is shown with a placeholder at first).
The Error I get when opening the Console, after I uploaded an image : Uncaught ReferenceError: $ is not defined at FileReader.reader.onload ((index):156)
But it works here : https://codepen.io/mobifreaks/pen/LIbca
Please give me a short explanation why this doesn't work for me and the solution to it.
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/>javascript html image
edited Nov 20 '18 at 9:30
fiza khan
913419
1
You are just missing<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">reference into your file and it should work. This can be achieved without jquery too
– Just code
Nov 20 '18 at 8:16
Either jQuery is missing or you are not aware that$is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.
– Jai
Nov 20 '18 at 8:18
add a comment |
I need a preview of an image after it got upload via <input type="file onchange="readURL(this);">.
I have found a solution on the internet, but that doesn't work for me:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}
"#blah" is the ID of the image(it is shown with a placeholder at first).
The Error I get when opening the Console, after I uploaded an image : Uncaught ReferenceError: $ is not defined at FileReader.reader.onload ((index):156)
But it works here : https://codepen.io/mobifreaks/pen/LIbca
Please give me a short explanation why this doesn't work for me and the solution to it.
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/>javascript html image
edited Nov 20 '18 at 9:30
fiza khan
913419
I need a preview of an image after it got upload via <input type="file onchange="readURL(this);">.
I have found a solution on the internet, but that doesn't work for me:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}
"#blah" is the ID of the image(it is shown with a placeholder at first).
The Error I get when opening the Console, after I uploaded an image : Uncaught ReferenceError: $ is not defined at FileReader.reader.onload ((index):156)
But it works here : https://codepen.io/mobifreaks/pen/LIbca
Please give me a short explanation why this doesn't work for me and the solution to it.
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/> function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/> function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#preview').attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}#preview {
max-width: 150px;
max-height: 150px;
}<input type="file" id="files" name="file" style="margin-left:1px" onchange="readURL(this);"/><br>
<img id="preview" src="" alt=""/>javascript html image
javascript html image
edited Nov 20 '18 at 9:30
fiza khan
913419
edited Nov 20 '18 at 9:30
fiza khan
913419
edited Nov 20 '18 at 9:30
fiza khan
913419
edited Nov 20 '18 at 9:30
fiza khan
913419
edited Nov 20 '18 at 9:30
fiza khan
913419
913419
asked Nov 20 '18 at 8:13
user10507326
1
You are just missing<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">reference into your file and it should work. This can be achieved without jquery too
– Just code
Nov 20 '18 at 8:16
Either jQuery is missing or you are not aware that$is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.
– Jai
Nov 20 '18 at 8:18
add a comment |
1
You are just missing<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">reference into your file and it should work. This can be achieved without jquery too
– Just code
Nov 20 '18 at 8:16
Either jQuery is missing or you are not aware that$is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.
– Jai
Nov 20 '18 at 8:18
1
1
You are just missing
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"> reference into your file and it should work. This can be achieved without jquery too– Just code
Nov 20 '18 at 8:16
You are just missing
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"> reference into your file and it should work. This can be achieved without jquery too– Just code
Nov 20 '18 at 8:16
Either jQuery is missing or you are not aware that
$ is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.– Jai
Nov 20 '18 at 8:18
Either jQuery is missing or you are not aware that
$ is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.– Jai
Nov 20 '18 at 8:18
add a comment |
1 Answer
1
active
oldest
votes
You must import the jquery.min.js
answered Nov 20 '18 at 8:46
M. FM. F
276
add a comment |
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1 Answer
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1 Answer
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active
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You must import the jquery.min.js
answered Nov 20 '18 at 8:46
M. FM. F
276
add a comment |
You must import the jquery.min.js
answered Nov 20 '18 at 8:46
M. FM. F
276
add a comment |
You must import the jquery.min.js
answered Nov 20 '18 at 8:46
M. FM. F
276
You must import the jquery.min.js
answered Nov 20 '18 at 8:46
M. FM. F
276
answered Nov 20 '18 at 8:46
M. FM. F
276
answered Nov 20 '18 at 8:46
M. FM. F
276
answered Nov 20 '18 at 8:46
M. FM. F
276
276
add a comment |
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1
You are just missing
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">reference into your file and it should work. This can be achieved without jquery too– Just code
Nov 20 '18 at 8:16
Either jQuery is missing or you are not aware that
$is the alias for the jQuery and you forgot to add it in the page. Instead just translate it in javascript syntax.– Jai
Nov 20 '18 at 8:18