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- // var fileInput = document.querySelector('file');
- var targetWidth = 400;
- var targetHeight = 400;
- function doUpload () {
- // upload picture
- }
- fileInput.onChange = function () {
- var file = this.files[0];
- var reader = new FileReader();
- reader.onload = function () {
- var image = new Image();
- image.onload = function () {
- var canvas = document.createElement('canvas');
- var context = canvas.getContext('2d');
- context.drawImage(image, 0, 0, targetWidth, targetHeight);
- var imageData = context.toDataURL('image/png');
- doUpload(imageData);
- }
- }
- reader.readAsDataURL(file);
- }
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