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Today, I would like to share with you the relevant knowledge of how to write the code for previewing pictures uploaded by JS+HTML5. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

The sample code is as follows:

Html5 Image upload Preview # preview {width: 300px; height: 300px; overflow: hidden;} # preview img {width: 100%; height: 100% } function preview1 (file) {var img = new Image () Url = img.src = URL.createObjectURL (file) var $img = $(img) img.onload = function () {URL.revokeObjectURL (url) $('# preview'). Empty (). Append ($img)} function preview2 (file) {var reader = new FileReader () reader.onload = function (e) {var $img = $('

'). Attr ("src" E.target.result) $('# preview'). Empty (). Append ($img)} reader.readAsDataURL (file)} $(function () {$('[type=file]')) .change (function (e) {var file = e.target.files [0] preview1 (file)})) above is "JS+HTML5 upload picture preview" How to write the code of the effect? all the contents of this article. Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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