AngleSharp is the ultimate angle brackets parser library. It parses HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specification.
I tried
let tmpl = doc.QuerySelectorAll("template"), which returns the template tag, but I can't drill down further than.
Sorry but C# / F# are no dynamic languages like JS. So you need to get the types right ;)
fwiw, here's my current code:
let templates = doc.QuerySelectorAll("template")
let titles =
query {
for tmpl in templates do
for p in tmpl.QuerySelectorAll("p") do
select p.OuterHtml
}titles is empty seq, so the "p" querying didn't work, which isn't surprising I guess, because I'm suppose to get the fragment inside tmpl and then query on it.
My assumption is that I need a filler in here:
tmpl.GetContentFragment().QuerySelectorAll("p") - but what would be GetContentFragment?
Don't see anything relevant in auto-completion list for
tmpl.
Not sure what
GetContentFragment is / should be. I guess you want Content?
QuerySelectorAll returns a collection of IElement. I should cast that to IHtmlTemplateElement
Wait, you can't down cast it. Looking for polymorhpic querying ... (is that anti-pattern in dotnet)
QuerySelector looks interesting - let me see how I can use it to pull multiple <template> tags
Wait, I thought that's more polymorphic that QuerySelectorAll - but the difference is only in arity
I was trying something like the following so as to obviate having to cast things latter:
let templates : IHtmlCollection<IHtmlTemplateElement> =
doc.QuerySelectorAll<IHtmlTemplateElement>("template")But this just throws a
error FS0001: This expression
was expected to have type↔ 'IHtmlCollection<IHtmlTemplateElement>' ↔but here has type↔ 'Collections.Generic.IEnumerable<IHtmlTemplateElement>
Oh wait, wrong collection type
Ah, now it worked! Using
System.Collections.Generic. Polymorphism for the win.
As an aside, it seems that I'm reinventing XSLT, as it appears to do the 'templating' feature I'm trying to build from scratch: https://developer.mozilla.org/en-US/docs/Web/API/XSLTProcessor/Basic_Example
(My idea uses JSON as data input; but XSLT uses XML as data input, which might be more interesting when used with AngleSharp)
Hello guys. I have such code. I would like to click programmatically on the button and it should redirect me to the main GitHub page, but somewhy it doesn't redirect me at all. Maybe you can help me?
from console it works,but from c# somewhy it doesent
a suggestion for the version list https://www.nuget.org/packages/AngleSharp/ , maybe unlist some old alphas and pad build number (?) with zeroes to get stable ordering, it's a bit confusing :wink:
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I started pushing night builds to github package repository instead to avoid that sillyness
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True, although nuget.org does send me notifications by email when a key is about to expire.
5 replies
@FlorianRappl: I bumped the version of diffing to 0.15.0 in the directory props file, but it still seem to be creating 0.14.0 packages. Do you have any idea way?
2 replies
Does anyone know why the sample
static async Task Main()
{
var jsService = new JsScriptingService();
var config = Configuration.Default.With(jsService);
var context = BrowsingContext.New(config);
var source = "<!DOCTYPE html><html><head><title>Test</title><script>function f1(el) { document.body.appendChild(el); }</script></head><body><h1>Some example source</h1><p>This is a paragraph element.</p><script>var em1 = document.createElement('em'); em1.textContent = 'This is some emphasized text.'; f1(em1);</script></body></html>";
var document = await context.OpenAsync(req => req.Content(source));
Console.WriteLine("Serializing the (original) document:");
Console.WriteLine(document.DocumentElement.OuterHtml);
var f1 = jsService.GetOrCreateJint(document).GetValue("f1");
var bElement = document.CreateElement("b");
bElement.TextContent = "This is some bold text.";
var jsB = JsValue.FromObject(jsService.GetOrCreateJint(document), bElement);
f1.Invoke(jsB);
Console.WriteLine("Serializing the document again:");
Console.WriteLine(document.DocumentElement.OuterHtml);
}gives a JavaScript exception
Jint.Runtime.JavaScriptException
HResult=0x80131500
Message=
Source=jint
StackTrace:
at Jint.Native.Function.ScriptFunctionInstance.Call(JsValue thisArg, JsValue[] arguments)
at Jint.Native.JsValue.Invoke(JsValue thisObj, JsValue[] arguments)
at Jint.Native.JsValue.Invoke(JsValue[] arguments)on the f1.Invoke(jsB) call? I use release 0.15 of AngleSharp and 0.14 of AngleSharp.Js
Also, we talked previously about github release workflows. For bUnit, I have something I am pretty happy with. Here is a boilerplate repo that has the bare minimum and an explanation of whats going on: https://github.com/bUnit-dev/workflows
Is the
AngleSharp.Url class supposed to be exposed to JavaScript as the URL (https://developer.mozilla.org/en-US/docs/Web/API/URL) constructor? I am trying to load an HTML document using JavaScript with AngleSharp 0.15 and AngleSharp.Js 0.14 and get a script error "ReferenceError: URL is not defined" from jint. Is there anything required or any way possible to have URL defined in JavaScript based the AngleSharp.Url class?
3 replies
Does anyone here know why https://github.com/AngleSharp/AngleSharp.XPath/tags only has releases up to 1.1.5 but NuGet shows two additional releases 1.1.6 and 1.1.7? Where is the repository for those two latest releases?
1 reply
Are AngleSharp packages supposed to be compatible with .NET framework? So far what I have tried and seen seemed to target .NET Standard 2.0 so that it should work with .NET framework but the latest change to the XPath package in https://github.com/AngleSharp/AngleSharp.XPath/commit/dfd9d33a7eb0201de6a7229ee13a4adcb37f926c#diff-615740254f47d7a152d8b39cff4d7b49d0aa3db2821f2f67ebe6f13ad0ab45beR10 seems to indicate a move to .NET 5.
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Hey Florian, i tried to push a 0.16.0 of diffing, but it just pushed a 0.15.0 preview. Think i did things correctly. Updated csproj Version and merged with master. What am I missing?
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Hello there, regarding AngleSharp.CSS: Is it possible to configure the CssParser to accept invalid values? From what I can see this used to be a configuration option, but not anymore? I know I can do this:
new CssParser(new CssParserOptions
{
IsIncludingUnknownDeclarations = true,
IsIncludingUnknownRules = true,
IsToleratingInvalidSelectors = true
})but nothing related to IsToleratingInvalidValues
am I missing something obvious?
Hey all. I'm new to AngleSharp and stuck on what is likely a simple problem. I'm trying to remove all meaningless whitespace from an HTML fragment. It appears I can do this with a custom formatter, but not clear if that's actually the best way. Can anyone here offer guidance on this?
4 replies
When I use
BrowserContextExtensions.OpenAsync does it only parse the document or also load scripts, stylesheets, and set cookies? I don't need anything more than parsing.
When I create the parser config, I pass to
WithDefaultLoader a LoaderOptions with IsNavigationDisabled set to true and IsResourceLoadingEnabled set to false. Is that enough to have it only download and parse the HTML document? I don't need or want anything else.
Scripts and stylesheets would require extra config (given by other libraries such as AngleSharp.Css), so without doing anything you get what you want.
1 reply