an operator for ignoring any exceptions

[Jordan Harband]

Relevant existing proposals:

 - https://github.com/tc39/proposal-optional-catch-binding/

 - https://github.com/tc39/proposal-pattern-matching/

On Fri, Aug 11, 2017 at 7:13 AM, Michał Wadas <michalwadas at gmail.com> wrote:

> It's extremely unlikely that new syntax will be introduced to replace one
> line helper function. Especially after experiences of PHP where
> swallow-error operator is a source of eternal torment.
>
> swallowException = fn => Promise.resolve().then(fn).catch(()=>null)
>
> On Fri, Aug 11, 2017 at 10:16 AM, Hikaru Nakashima <
> oao.hikaru.oao at gmail.com> wrote:
>
>> I think this idea is useful in async function.
>>
>> For exsample, we write codes as below, when we use fetch()  in async
>> function.
>>
>> ```js
>>
>> let res, text
>>
>> try {
>>     res = await fetch( url )
>> } catch ( err ) { console.log( 'network error' ) }
>>
>> if ( ! res.ok ) console.log( 'server error' )
>> else text = await res.text( )
>>
>>
>> ```
>>
>> or
>>
>> ```js
>>
>> let res, text
>>
>> res = await fetch( url ).catch( err => null )
>> if ( ! res ) console.log( 'network error' )
>>
>> else if ( ! res.ok ) console.log( 'server error' )
>> else text = await res.text( )
>>
>>
>> ```
>>
>> but, we can write as below  if we use this proposal.
>>
>> ```js
>>
>> let res, text
>>
>> res = try await fetch( url )
>> if ( ! res ) console.log( 'network error' )
>>
>> else if ( ! res.ok ) console.log( 'server error' )
>> else text = await res.text( )
>>
>> ```
>>
>> or do we need another syntax like "await?" ?
>>
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>>
>>
>
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