Typescript Issue: The 'append' property is not recognized on the 'HTMLElement' type

The Dilemma:

I encountered an issue with Typescript 2.2.1 while attempting to attach a compiled angular 1.5 template to an existing HTMLElement.

Snippet of Code:

$document.find(scope.target)[0].append($compile(menu)(scope)[0]);

Error during Compilation:

[ts] Property 'append' does not exist on type 'HTMLElement'

After reviewing the type definitions, I could not find any reference to the append() method.

Any suggestions regarding the appropriate type or version of Typescript for this scenario would be greatly appreciated.

Thank you!

javascriptangularjstypescripttypescript2.2

Answer №1

When it comes to TypeScript, there is no need for concern.

The appropriate function to utilize is appendChild:

https://developer.mozilla.org/en/docs/Web/API/Node/appendChild

append is specific to jQuery, and if you prefer to use it, you can try the following:

$document.find(scope.target).append($compile(menu)(scope)[0]);

This should also yield positive results.

I trust this information proves useful.

Answer №2

One can find an append/prepend function in HTMLElement, however, it is currently considered experimental according to Mozilla Developer Network.

To avoid TypeScript errors while using this function, I resorted to casting it as any like so ¯\_(ツ)_/¯ 


(<any>myElement).append(otherElement)

Answer №3

Element.append() has been available since 2016. If you encounter an error in TypeScript:

  • Make sure the type is Element and not just a Node
  • Ensure that the DOM library is being loaded in your configuration
  • Check that you are using a recent ES target/lib in your configuration

Here's an example of a proper configuration:

{
  "compilerOptions": {
    "target": "es2020",
    "lib": ["dom", "es2019", "es2020", "dom.iterable"]
  }
}

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