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This article mainly introduces how to verify the file size in html, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand it.

Verify file size

If the image uploaded by the user is too large, in order not to put pressure on the server, we need to limit the size of the image. The following is to allow users to upload images that are less than 1m. If it is larger than 1m, the upload will fail.

FileUploader.addEventListener ('change', (event) = > {/ / Read the file size const file = event.target.files [0]; const size = file.size; let msg =''; / / check whether the file size is larger than 1MB if (size > 1024 * 1024) {msg = `The allowed file size is 1MB. The file you are trying to upload is of ${returnFileSize (size)} `;} else {msg = `A ${returnFileSize (size)} file has been uploaded successfully. `;} feedback [XSS _ clean] = msg;}); Thank you for reading this article carefully. I hope the article "how to verify File size in html" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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