Oxpecker.ViewEngine
0.7.0
See the version list below for details.
dotnet add package Oxpecker.ViewEngine --version 0.7.0
NuGet\Install-Package Oxpecker.ViewEngine -Version 0.7.0
<PackageReference Include="Oxpecker.ViewEngine" Version="0.7.0" />
paket add Oxpecker.ViewEngine --version 0.7.0
#r "nuget: Oxpecker.ViewEngine, 0.7.0"
// Install Oxpecker.ViewEngine as a Cake Addin
#addin nuget:?package=Oxpecker.ViewEngine&version=0.7.0
// Install Oxpecker.ViewEngine as a Cake Tool
#tool nuget:?package=Oxpecker.ViewEngine&version=0.7.0
Oxpecker.ViewEngine
Markup example:
open Oxpecker.ViewEngine
type Person = { Name: string }
let subView = p() { "Have a nice day" }
let mainView (model: Person) =
html() {
body(style="width: 800px; margin: 0 auto") {
h1(style="text-align: center; color: red") {
$"Hello, {model.Name}!"
}
subView
ul() {
for i in 1..10 do
br()
li().attr("onclick", $"alert('Test {i}')") {
span(id= $"span{i}", class'="test") { $"Test {i}" }
}
}
}
}
Documentation:
Oxpecker.ViewEngine is code-as-markup engine used to render your HTML views based on the F# feature called Computation Expressions.
HtmlElement
HtmlElement is a main building block of Oxpecker.ViewEngine. It can be constructed from the instance of the HtmlElementType:
module NodeType =
let NormalNode = 0uy
let VoidNode = 1uy
let RegularTextNode = 2uy
let RawTextNode = 3uy
type HtmlElementType = { NodeType: byte; Value: string }
type HtmlElement(elemType: HtmlElementType) =
...
This represents 4 types of Html elements: normal tags that have opening and closing part, void tags with no closint part and text nodes (which can be escaped and non-escaped strings).
All HTML tags inherit from HtmlElement and you can easily create your own tag:
type myTag() =
inherit HtmlElement("myTag") // this overload creates NormalNode
HtmlElement holds two collections inside: attributes and children. More on them below.
Children
Normal nodes can have children that will be added to children collection as you write them between curly braces. Void nodes and Text nodes don't have children. You can programmatically access Chidren property of any HtmlElement.
let result = div() {
br()
span() { "Some text" }
}
let children = result.Children // <br> and <span>
Attributes
Normal and Void nodes can have attributes. Some general attributes are defined inside HtmlElement while each tag can have it's specific attributes. This will prevent you from assiging attributes to the element that it doesn't support. You can programmatically access Attributes property of any HtmlElement.
let result = div(class'="myClass") {
br(id="1234") // href attribute won't work here
a(href="/") { "Some link" }
}
let children = result.Attributes // myClass
You can also attach any custom attribute to the HtmlElement using .attr method:
div().attr("my-secret-key", "lk23j4oij234"){
"Secret div"
}
For data-* attributes you can use dedicated method:
div().data("secret-key", "lk23j4oij234"){
"Secret div"
} // renders <div data-secret-key="lk23j4oij234">Secret div</div>
Event handlers
Oxpecker.ViewEngine doesn't provide attributes for javascript event handlers like onclick. This is done on purpose, since it would encourage people using them, which is rather an antipattern. However, if you really need it, you can always use .on method to achieve same goal.
ViewEngine will create html attribute with inline handler for you:
div().on("click", "alert('Hello')"){
"Clickable div"
}
// <div onclick="alert('Hello')">Clickable div</div>
HTML escaping
Oxpecker.ViewEngine will escape text nodes and attribute values for you. However, sometimes it's desired to render unescaped html string, in that case raw function is provided
div(){
"<script></script>" // This will be escaped
raw "<script></script>" // This will NOT be escaped
}
Rendering
There are several functions to render HtmlElement (after opening Oxpecker.ViewEngine namespace):
- Render.toString will render to standard .NET UTF16 string
- Render.toBytes will render to UTF8-encoded byte array
- Render.toHtmlDocBytes is the same as Render.toBytes, but will also prepend
"<!DOCTYPE html>"to the HTML document
Aria
To enable ARIA attributes support you need to open Aria module:
open Oxpecker.ViewEngine.Aria
let x = span(
role="checkbox",
id="checkBoxInput",
ariaChecked="false",
tabindex=0,
ariaLabelledBy="chk15-label"
)
Fragments
Sometimes you need to group several elements together without wrapping them in div or similar. You can use __ special tag for that:
let onlyChildren = __() {
span() { "Some text" }
span() { "Some other text" }
}
let parent = div() {
onlyChildren
}
| Product | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. |
-
net8.0
- FSharp.Core (>= 8.0.200)
- Microsoft.Extensions.ObjectPool (>= 8.0.2)
NuGet packages (2)
Showing the top 2 NuGet packages that depend on Oxpecker.ViewEngine:
| Package | Downloads |
|---|---|
|
Oxpecker
F# web framework built on top of ASP.NET Core |
|
|
Oxpecker.Htmx
HTMX support for Oxpecker.ViewEngine |
GitHub repositories
This package is not used by any popular GitHub repositories.
Added data-* attribute support