Re: How would using await be possible in an event handler content attribute?

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: How would using await be possible in an event handler content attribute?
Date	Sat, 06 May 2017 01:16:23 +0200
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Thomas 'PointedEars' Lahn wrote:

> Martin Honnen wrote:
>> If I simply use
>> 
>>    <input type="button" value="test"
>>     onclick="var response = await fetch(location.href);">
>> 
>> I get an error "Unexpected identifier".

Me too.  To be precise, a SyntaxError exception with that message is thrown
and not caught.
 
>> Is there any way to designate an event handler content attribute as an
>> async function body?
> 
> I do not know of any.  The obvious solution might be
> 
>   onclick="(async function () {
>     var response = await fetch(location.href);
>   }())"
> 
> or
> 
>   onclick="async function blub () {
>     var response = await fetch(location.href);
>   }; blub();"

Both work in

| Chromium	57.0.2987.98 (Developer Build) Built on 8.7, running on Debian stretch/sid (64-bit)
| Revision	a6a06b78087c9fdb4b12fe0ac1b87fdc10179f8b
| OS                Linux 
| JavaScript	V8 5.7.492.63
| […]
| User Agent	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36
| Command Line	/usr/lib/chromium/chromium --disk-cache-size=44040192 --show-component-extension-options --ppapi-flash-path=/usr/lib/pepperflashplugin 
nonfree/libpepflashplayer.so --ppapi-flash-version=23.0.0.207 --flag-switches-begin --ignore-gpu-blacklist --flag-switches-end

(<chrome://version>)

So if I had to use one of them, I would use the first one (the AFE).

However, why would one want to produce spaghetti code?

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PointedEars
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Thread

How would using await be possible in an event handler content attribute? Martin Honnen <martin.honnen@gmx.de> - 2017-05-05 13:30 +0200
  Re: How would using await be possible in an event handler content attribute? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-05 20:02 +0200
    Re: How would using await be possible in an event handler content attribute? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-06 01:16 +0200

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