tryflow | Try a static type checker for JavaScript | Runtime Evironment library

 by   ptmt JavaScript Version: Current License: MIT

kandi X-RAY | tryflow Summary

kandi X-RAY | tryflow Summary

tryflow is a JavaScript library typically used in Server, Runtime Evironment, Nodejs applications. tryflow has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Flow is a static type checker for Javascript written in Ocaml by Facebook team. See

            kandi-support Support

              tryflow has a low active ecosystem.
              It has 30 star(s) with 2 fork(s). There are 3 watchers for this library.
              It had no major release in the last 6 months.
              There are 5 open issues and 10 have been closed. On average issues are closed in 35 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of tryflow is current.

            kandi-Quality Quality

              tryflow has 0 bugs and 0 code smells.

            kandi-Security Security

              tryflow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              tryflow code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              tryflow is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              tryflow releases are not available. You will need to build from source code and install.

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            tryflow Key Features

            No Key Features are available at this moment for tryflow.

            tryflow Examples and Code Snippets

            No Code Snippets are available at this moment for tryflow.

            Community Discussions


            How to extend an Error in JavaScript with the correct flowtypes
            Asked 2019-Nov-15 at 01:30

            I'm trying to create a custom error that extends Error with correct flowtypes

            Example of what I'm trying to do:



            Answered 2019-Nov-15 at 01:30

            You need to declare that those propertied exist before you assign to them, e.g.



            Higher-order function returning generic function
            Asked 2018-Apr-10 at 16:34

            So in this basic example (tryflow):



            Answered 2018-Apr-10 at 16:34

            You need to generically type your baseID function so Flow knows what you expect as argument and return type. It seems like Flow doesn't use the type of IndentityFunction when trying to figure out what the baseId function is really doing.




            Flow (flowtype) and react: defaultProps are not controlled?
            Asked 2018-Mar-19 at 22:20

            Using the v0.68.0, it seems that defaultProps are not controlled:

            The code below (from official doc) won't raise error when declaring the "foo" defaultProp (as a string instead of a number):



            Answered 2018-Mar-19 at 22:20

            They are checked when you try and create a component, i.e:



            flow string is incompatible with string literal?
            Asked 2018-Feb-26 at 09:46

            I'm trying to annotate a custom event emitter and restrict the event names to specific strings. For this example though I'll just use one event name:



            Answered 2018-Jan-31 at 05:33

            Since Bar's on function is overriding Foos, the type of foo in the subclass's method needs to be a subtype of the corresponding type in the superclass's method. While 'bar' is a string, all string are not 'bar'.

            For example, these will compile fine:



            How to annotate a function with multiple possible call signatures in Flow?
            Asked 2017-Nov-06 at 17:25

            In JavaScript, it's common to have a function that may be called in more than one way – e.g. with handful of positional arguments or a single options object or some combination of the two.

            I've been trying to work out how to annotate this.

            One way I tried was to annotate rest args as a union of various possible tuples:



            Answered 2017-May-03 at 06:50

            Of the three possible workouts you gave, I've figured out how to make it work using an single options object, however because you require at least one object to be set, you need to define each possibility.

            Like this:



            Getting an error discriminating a union type ("property not found in object type")
            Asked 2017-Sep-27 at 13:28

            I am having a hard time describing the type of a function argument which is either a success or an error api response. Here is a simple puzzling example of the problem (reproduced in TryFlow at this address)

            The function can take either a success response object or an error response object:



            Answered 2017-Sep-27 at 12:51

            To access a member that is not common to all types in a union, you have to give flow a way to see which type it's dealing with. I understand that you're trying to use the truthiness of error to determine the specific type, but flow does not understand this.

            The pattern flow uses for this situation is called "disjoint unions". It is described here:

            I'm not an expert on flow, but it seems one solution would be to modify your type definition for SuccessResponse as follows:



            Refining mixed to a known object type in Flow
            Asked 2017-Jul-24 at 11:28

            We're trying to do type refinement in Flow to guard against values entering our application at the external interfaces. To do this we're using mixed and then trying to refine to known types, but Flow isn't make it easy!

            The following seems like it should work, I've validated that the mixed type value matches the requirements of the response type.



            Answered 2017-Jul-24 at 11:28

            That would be unsafe. If something has type string at runtime, it doesn't mean that it has the same static type, e.g. it could be some enum: 'Foo' | 'Bar', so making it just string would allow unsafe mutations. On the other hand, it could be number | string, so in the future head could become a number or any type, really.

            Instead you can do the following:


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