Does JS Transformer support using FileReader() function to read HTML file? Or there is an alternative to instead of using FileReader()?
What I want to achieve is basically when user input HTML file, the content (the code) inside that file will be expected as output in a textarea input.
Hey @yeftanma!
How would users be inputting HTML files in your app? If you're using a file input or similar component you may be able to do something like {{ atob(fileInput1.value[0]) }} to render the HTML in a text file.
It's possible to use the FileReader API but Retool file inputs store files as base64 strings instead of Blobs. You can get around that using a workaround like this or by using a script in a component in which you can create your own upload component. Both solutions might add some unnecessary complexity though 
Let me know if something like the attached app works for you! (You can import and play around with it)
render_html_file.json