The problem is `download` property that gets munged in advanced
compilation.
You can use `aset` to prevent it from being munged:
(aset lnk download filename)
or alternatively provide extern file to tell Closure compiler not to munge
it:
function HTMLLinkElement() {}
HTMLLinkElement.proptotype.download;
2015-02-15 3:35 GMT+02:00 Mike Thompson m.l.thompson...@gmail.com:
On Friday, February 13, 2015 at 6:05:37 PM UTC+11, Jensontech wrote:
I need to allow the user to save content generated by Clojurescript to
their local drive.
I do it using this code -
(defn- save-file
[filename content]
(let [lnk (get-element-by-id file-export-link)
blob (js/Blob. (js/Array. content) {:type text/plain})]
(set! (.-href lnk) (.createObjectURL js/URL blob))
(set! (.-download lnk) filename)
(.click lnk)))
When the function runs it does a pseudo download to the named file. This
works with :optimizations :none.
When I try the same thing with :optimizations :advanced, instead of
doing a download and prompting to open or save a file, it moves the browser
to a URL like: blob:null/d9bbcdab-7c87-etc
I have tried Chas Emericks's url package https://github.com/cemerick/url
to create the URL but it still doesn't work.
Something is being munged by the optimization, but I am not sure what.
Does anyone have any ideas how to go about fixing this?
I hesitate to offer advice here, because I'm just finding my way in these
sort of matters myself but ...
1. You are using HTML5 APIs: Blob and URL.
2. Your code works with optimisation :none, but not :advanced
3. I conclude that advanced optimisation is munging the symbols.
4. Which means you need to include externs for this API for URL and Blob)
This appears to be the right set of externs:
https://code.google.com/p/closure-compiler/source/browse/externs/fileapi.js
But at that point, I run out of knowing much. Because it is part of Google
Closure, you'd think there was some way of pulling in that file.
Background:
http://lukevanderhart.com/2011/09/30/using-javascript-and-clojurescript.html
Alternative thought ...
Perhaps you could the `goog` wrappers for the HTML5 API:
http://docs.closure-library.googlecode.com/git/namespace_goog_fs.html
(But I can't see how to get a Blob).
(ns my.module
(:require [goog.fs :as fs]))
;; later
(.createObjectUrl fs blob)
;; or maybe
(fs/createObjectUrl blob)
;; BUT no idea how to create a Blob in the first place.
--
Mike
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Mike
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