Customize live_file_input

Phoenix Forum Questions / Help
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1

Hello! I am trying to customize the file input generated by the following code:

 <%= live_file_input @uploads.my_upload, class: "my-classes"%>

this gets turned into:

<input accept=".png,.jpg,.jpeg,.pdf" class="my-classes" data-phx-active-refs="" data-phx-done-refs="" data-phx-preflighted-refs="" data-phx-update="ignore" data-phx-upload-ref="phx-Fo-HLbVCBA32siBG" id="phx-Fo-HLbVCBA32siBG" name="my_upload
![fileupload|231x33](upload://kAIqcrr4esObUryTFRRugvEEvj9.png)
" phx-hook="Phoenix.LiveFileUpload" type="file">

Right now it just displays a button that says “Browse…” and next to that is “No file selected.”. I want to customize this button with my own text and styles but so far have not been able to achieve this. The docs for live_file_input say you can pass options (like :class) but there is no list of options to reference from. Thank you!

2

Referring to the options, the docs say

Options may be passed through to the tag builder for custom attributes.

The tag builder just makes an html element like

<tag option1="opt1_val" option2="opt2_val">content</tag>

You can see an example of this when you pass class: "my-classes" to the builder and that translates to class="my-classes" in HTML. You can pass whatever name/value you want - AFAIK there is no requirement that they are valid attributes for any particular tag type.

You can find more about HTML file input attributes here

3

I found a solution. I just wrapped the whole live_file_input in a label tag and set the live_file_input to display: none like this:

<label class="my-classes">
   <%= live_file_input @uploads.my_upload, class: "hidden"%>
   my custom upload file text
</label>

This way I can customize the file input text and styles they way I want! Apparently its not so straightforward to style file upload inputs.

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4

There are a couple of methods described on MDN. Using display none is warned against as it affects keyboard accessibility.

Using Alpine JS to trigger the click with the visullay-hidden css trick on the MDN page:

<LiveFileInput upload={@uploads.dbf} class="visually-hidden" opts={"x-ref": "liveFileInput"} />
<Button color="gray" opts={"x-on:click": "$refs.liveFileInput.click()"}>Select files</Button>
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