Currently, I am working with a Bootstrap Vue form to create a basic form allowing users to upload files. I am wondering if there is a way to validate the size of files selected within the Vue form.
My goal is to restrict users from uploading certain files.
I came across a potential solution here, but it appears to involve a third-party plugin. I would prefer a solution that does not require additional plugins.
Check out this Vue code snippet that demonstrates how to validate the size of a file before submitting a form.
The key is to access the file object from the input's files property and verify the size using the size property. The rest involves handling the validation to prevent form submission in case of failure.
While client-side validation improves user experience, it's crucial to remember that server-side validation is essential for security purposes.
new Vue({
el: '#app',
methods: {
onSubmit(e) {
const file = this.$refs.file.files[0];
if (!file) {
e.preventDefault();
alert('Please select a file');
return;
}
if (file.size > 1024 * 1024) {
e.preventDefault();
alert('File size should not exceed 1MB');
return;
}
alert('File is within size limit');
},
},
});<script src="https://rawgit.com/vuejs/vue/dev/dist/vue.js"></script>
<div id="app">
<form @submit="onSubmit">
<input type="file" ref="file">
<button type="submit">Submit</button>
</form>
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