Polymer: Imported resource from origin 'file://' has been blocked from loading by Cross-Origin Resource Sharing policy: Received an invalid response. Origin 'null' is therefore not allowed access.
I did the same site as the Making app for 10 minutes , and Chrome
display and white image , the Inspect element was a bug as its title .
Also, bower_components polymer docs index.html was a few files that did not exist . These are:
- Bower_components / polymer / perf - lib / perf.js
- Bower_components / polymer / x- elements / x -doc -viewer / x- doc- viewer.html
- Bower_components / polymer / assets / icons.html
It is a version of the Polymer 0.5 .
Please look at this , I was two or three weeks looked for this.
ghost
All 12 comments
Due to the way HTML imports work, Polymer requires a web server. You could try developing using Chrome Dev Editor, which has a built-in web server.
https://chrome.google.com/webstore/detail/chrome-dev-editor-develop/pnoffddplpippgcfjdhbmhkofpnaalpg
miztroh-zz
on 14 May 2015
By design HTMLImports can only load resources from the same (non-file) domain or domains that support CORS.
sorvell
on 22 May 2015
Those docs are old and vestigial, thanks for pointing out. We'll remove. The PRIMER.md and polymer-project.org website should be used for docs.
kevinpschaaf
on 22 May 2015
You could alwasy just set up your own node server and then you can present these locally instead of pushing them to your own testing server.
jdmagic21
on 16 Oct 2015
How about using polymer inside cordova ?
kolarski
on 6 Apr 2016
We could easily start a web server by using python:
python -m SimpleHTTPServer 8000
xiaoxuanwang
on 20 May 2016
You can consider using polymer starter kit as well and install the local development server.
The instructions are on the following link.
https://developers.google.com/web/tools/polymer-starter-kit/
josephmokenela
on 24 Nov 2016
Wait what?? With the "new web" we will no longer be able to open HTML files from local files?? What the hell?? Can someone perhaps point me to some documentation of this?
stevenroose
on 7 Mar 2018
@stevenroose Opening an HTML file directly will work just fine via a file protocol URL. However, HTMLImports cannot load data via that protocol.
miztroh-zz
on 7 Mar 2018
Opening an HTML file directly will work just fine
Only when that file doesn't import other files. What if I want to create an offline-capable browser dashboard that does use htmlimports?
stevenroose
on 7 Mar 2018
Operating offline isn't the issue. The protocol is the issue. file:// requests will not work, but you can run a local web server (polymer serve, express, etc.) to use HTTP requests instead. You could even use the following Chrome extension to run a local web server.
miztroh-zz
on 7 Mar 2018
@stevenroose , this isn't an issue in Edge
DieAntonie
on 21 Jan 2019
Related issues
limonte
路
3Comments
hzmnet
路
4Comments
mbana
路
3Comments
bmodeprogrammer
路
3Comments
derhuebiii
路
3Comments
Most helpful comment
Wait what?? With the "new web" we will no longer be able to open HTML files from local files?? What the hell?? Can someone perhaps point me to some documentation of this?