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Questions tagged [elmish]

Use for question relating to the elmish framework for f#. Consider also including the tags [fable-f#] and [f#].

Elmish is an implementation of the in and . It is modular in its design and can target different platforms and rendering libraries, but is typically used with , using elmish-react, and targeting web browsers, using elmish-browser.

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65 questions
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HMR - Update failed: SyntaxError: Unexpected token < in JSON at position 0

I'm working in a Elmish application. I put in place SSR (server-side rendering) for the index page only as I need some dynamically generated initial state at the start of the application. Since the Hot module replacement is not working and it is…
sabotero
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Syntax confusion in Fable with EventTarget

I'm new to Fable/Elmish/React, and I'm trying to understand the syntax to cast an EventTarget so I can get to the .value The examples I can find all use the input [ Value model.Value OnChange (fun ev -> ev.target?value |> string …
Paul Lawrence
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Handling custom events in Fable-Elmish

Hot on the heels of my previous question the example I am working on in "Elm in Action" (and trying to port to Fable-Elmish) has a custom event from a custom element. In the html file I have the following:
melston
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Attributes vs Properties in Fable Elmish

I am going through the book "Elm in Action" and trying to convert the application developed there to Fable-Elmish. Many things translate directly from Elm to Elmish but not everything (at least not directly). Right now I am trying to understand…
melston
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Resolving .net namespace conflicts

I'm using Giraffe and trying to integrate Elmish.Bridge. I get the following error: error FS0892: This declaration opens the module 'Elmish.Bridge.Giraffe', which is marked as 'RequireQualifiedAccess'. Adjust your code to use qualified references to…
sashang
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How do I set a default Value in a dropdown menu in Fable Elmish?

i want to have a default value in the dropdown that isnt one of the choosable options (not: DefaultValue "2"). It should be something like the following but not for an input-field. Input.Placeholder "Your name here" ( i tried Placeholder in…
Einhorni
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How to add img tag using Fable-Elmish

I want to add an image tag like so img [ Src "/AirPassengerData.png" ] but the image does not load when I view the generated website. I am using the dotnet core project template fable-elmish-react and although I have found this…
user7817808
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How to setup fable-elmish-react native app?

I'm able to setup Elmish-React by following https://github.com/fable-elmish/react dotnet new -i "Fable.Template.Elmish.React::*" dotnet new fable-elmish-react -n MyProject but I can't figure out what I need to do to get the equivalent native app. I…
Stephen Straton
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Login in a multi-page website (SAFE Stack)

Does anybody use the Elmish routing for a multi-page app (SAFE Stack in my case) as specified by Maxime Mangel here on StackOverflow , but with a login page? Do you, at the same time, use the accessibility (Anonymous/LoggedIn) philosophy as…
Miroslav Husťák
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How to measure the width of a string using Fable or Feliz in an Elmish app?

In an Elmish app (using Fable and Feliz), I'm trying to create a container (a div) with the exact width as an arbitrary string. Is there a way to measure the width of a string ahead of time (before displaying it)?
redcurry
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How To Read A Dropped File F#

I have a Elmish-React project and this dropzone OnDrop (fun e -> let file = e.dataTransfer.files.item 0 e.preventDefault() e.stopPropagation() ) how do I load the content of this file?
fourglobe
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passing/converting Elmish `dispatch` messages from a parent component to a child component

In the wonderful FBlazorShop repo, Onur Gumus is riffing off of Steve Sanderson’s Pizza Workshop with F# flavor. On line 128 of blob/master/FBlazorShop.Web.BlazorClient/Home/Home.fs [GitHub], Onur is passing an Elmish Message for the parent,…
rasx
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How is child/submodel to parent/main model messaging done in Elmish.WPF?

(Newbie question). In Elmish.WPF, I have a parent module, App, holding a child submodule, FinderLastName: module App = type Model = { FinderLastName: FinderLastName.Model } type Msg = |…
Alan Wayne
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Javascript onclick alternative in F# - SAFE

I have two divs of matching sizes on a page, and want to hide one and display the other, swapping between them on a button click. Usually i would use a javascript click event to toggle display, but i am unsure of how to use default Javascript with…
David McIntyre
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How do I solve encoder problem with the Elmish Debugger?

I've got an application that I've built in SAFE-Stack using websockets, more or less following the approach here: https://github.com/CompositionalIT/safe-sockets It works fine but the Elmish debugger doesn't like the type of WsSender in this…
Andrew Willshire
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