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how to crop an image in javascript using cropper js

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step 1: set up your project
html structure
create an html file with the following structure:
```html
!doctype html
html lang="en"
head
meta charset="utf-8"
meta name="viewport" content="width=device-width, initial-scale=1.0"
titleimage cropper/title
style
.img-container {
max-width: 100%;
}
img {
max-width: 100%;
}
/style
/head
body
h1image cropper example/h1
input type="file" id="inputimage" accept="image/*"
div class="img-container"
img id="image" src="" alt="picture"
/div
button id="cropbutton"crop/button
canvas id="resultcanvas"/canvas
/body
/html
```
```javascript
// select the input and image elements
let cropper;
// listen for file input changes
const done = (url) = {
};
...
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