Steps to repro:
npm install
npm start
Then open http://localhost:3000/index.html in a browser.
Steps to repro:
npm install
npm start
Then open http://localhost:3000/index.html in a browser.
<!doctype html> | |
<body> | |
<pre id=display></pre> | |
<script> | |
fetch('/foo', { | |
method: 'POST', | |
headers: { | |
"x-access-token": "example-key", | |
'Accept': 'application/json', | |
'Content-Type': 'application/json; charset=utf-8' | |
}, | |
body: JSON.stringify({foo: 'bar'}) | |
}).then(response => response.json()) | |
.then(resp => { | |
display.innerHTML += JSON.stringify(resp) + '\n' | |
}).catch(console.log.bind(console)) | |
</script> | |
</html> |
var express = require('express') | |
var app = express() | |
app.post('/foo', (req, resp) => { | |
resp.json({ok: true}) | |
}) | |
app.use(express.static('./')) | |
app.listen(3000, () => console.log('listening on port 3000')) |
The MIT License (MIT) | |
Copyright (c) 2016 Nolan Lawson | |
Permission is hereby granted, free of charge, to any person obtaining a copy | |
of this software and associated documentation files (the "Software"), to deal | |
in the Software without restriction, including without limitation the rights | |
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
copies of the Software, and to permit persons to whom the Software is | |
furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all | |
copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | |
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE | |
OR OTHER DEALINGS IN THE SOFTWARE. | |
{ | |
"name": "fetch-391", | |
"version": "1.0.0", | |
"description": "", | |
"main": "index.js", | |
"scripts": { | |
"start": "node index.js" | |
}, | |
"keywords": [], | |
"author": "Nolan Lawson <nolawson@microsoft.com>", | |
"license": "MIT", | |
"dependencies": { | |
"express": "^4.14.0" | |
} | |
} |
With this change, a TypeMismatch is thrown from fetch, and the response won't be parsed.
This appears to be fixed in Edge15... for older versions, we're getting around it with the following to ensure the polyfill is used instead: