The validation error from W3C states: "Attribute size is not permitted for the input element at this location."
<input type="file" name="foo" size="40" />
How should the width of a file input be specified in HTML5?
The validation error from W3C states: "Attribute size is not permitted for the input element at this location."
<input type="file" name="foo" size="40" />
How should the width of a file input be specified in HTML5?
To customize the input field, you can utilize the style attribute which enables you to apply CSS.
<input type="file" name="foo" style="width: 40px" />Alternatively, you can use separate CSS:
input[name="foo"] {
width: 40px;
}
To define the width in your CSS file, use the following syntax:
input[type=file] { width: 300px; border: 2px solid blue; }
One way to adjust the width of the entire file input, including the button and filename text, is by utilizing CSS:
input[type="file"] {
/* functional */
width: 100%;
/* cosmetic */
background-color: steelblue;
}<input type="file">(This method is now supported in Firefox as well.)
However, keep in mind that this does not necessarily affect the width of the file select button, potentially leading to issues like clipping, as demonstrated in the snippet below.
input[type="file"] {
width: 40px;
}<input type="file">If you need to specifically adjust the file select button's width (or other button styles), you can make use of the ::file-selector-button pseudo-element. Here's an example:
input[type="file"] {
width: 40px;
}
input:last-of-type::file-selector-button {
width: 100%;
overflow: hidden;
text-overflow: ellipsis;
}
/* cosmetic */
body {
display: flex;
flex-direction: column;
gap: 8px;
}<input type="file">
<input type="file">To properly style the 'input', enclose it within a div element:
<div style="width: 40%">
<input class="d-flex justify-content-end align-items-center" style="background-color: yellow; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; width: 100%" type="file" id="file"/>
</div>
<form class="upload-form">
<input class="upload-file" data-max-size="2048" type="file" >
<input type=submit>
</form>
<script>
$(function(){
var fileInput = $('.upload-file');
var maxSize = fileInput.data('max-size');
$('.upload-form').submit(function(e){
if(fileInput.get(0).files.length){
var fileSize = fileInput.get(0).files[0].size; // measured in bytes
if(fileSize>maxSize){
alert('The file size exceeds ' + maxSize + ' bytes');
return false;
}else{
alert('File size is within limits- '+fileSize+' bytes');
}
}else{
alert('Please select a file to upload');
return false;
}
});
});
</script>
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