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This article mainly shows you "html how to manage file content", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "html how to manage file content" this article.

Manage the contents of the file

After successfully uploading the file to display the contents of the file, from the user's point of view, if there is no preview after uploading, it will be very strange and inconsiderate.

We can use the FileReader object to convert the file to a binary string. Then add a load event listener to get the binary string when the file is successfully uploaded.

/ / FileReader instance const reader = new FileReader (); fileUploader.addEventListener ('change', (event) = > {const files = event.target.files; const file = files [0]; reader.readAsDataURL (file); reader.addEventListener (' load', (event) = > {const img = document.createElement ('img'); imageGrid.appendChild (img); img.src = event.target.result; img.alt = file.name;});}) The above is all the contents of the article "how html manages the contents of files". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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