Vue Js File upload size limit validation
Vue Js File upload size limit validation:In Vue.js, file upload size limit validation can be performed using a combination of HTML5's built-in validation attributes and JavaScript. The HTML5 'input' element's 'accept' attribute can be used to specify the file types allowed for upload, while the 'maxlength' attribute can be used to limit the file size. In addition, JavaScript can be used to further validate the file size and provide feedback to the user if the file exceeds the limit. This can be achieved by attaching an event listener to the file input element, which triggers when a file is selected, and then checking the size of the file against the maximum allowed size.
Thanks for your feedback!
Your contributions will help us to improve service.
How can I implement file upload size limit validation in Vue js?
This is a Vue.js code snippet that implements a file upload component with a size limit validation.
When a user selects a file, the handleFileUpload
method is called, which checks the file size against the maxFileSize
limit. If the file size exceeds the limit, a message is displayed to the user indicating that the file size is too large. Otherwise, the FileReader
API is used to read the file contents and perform some action with it.
The data
object of the Vue instance contains two properties:
maxFileSize
: a number that represents the maximum allowed file size in bytes.fileSizeExceeded
: a boolean that indicates whether the selected file exceeds themaxFileSize
limit.
The handleFileUpload
method takes an event
parameter that contains information about the selected file. It uses the File
object's size
property to check whether the file size exceeds the maxFileSize
limit. If the file size is too large, fileSizeExceeded
is set to true
, and the method returns, preventing further processing of the file. If the file size is within the limit, the FileReader
API is used to read the file's contents asynchronously. When the reading is complete, the onloadend
callback function is called, and fileSizeExceeded
is set to false
. At this point, the file can be processed further according to the application's requirements.