Developing a form element in Angular and submitting it directly from the typescript file

I'm having an issue with an API that provides data and a destination website URL. In my Angular component, I am attempting to call this API, create a form element, update the URL and data in the form, and then submit it.

Here is the code I have been using:

this._apiService.generateData()
      .subscribe((response) => {
        const form = `<form method="post" target="_blank" action=${response.destination}><input type="hidden" name="TestResponse" value=${response.testResponse}/></form>`;

        const node = new DOMParser().parseFromString(form , "text/html");

        const formElement = node.body.getElementsByTagName("form").item(0) as HTMLFormElement;

        formElement.submit();
      });

If I add the form tag to the component's HTML file and use this TypeScript approach instead, everything works fine:

this._apiService.generateData()
      .subscribe((response) => {
        const form = document.getElementById("test-form") as HTMLFormElement;
        form.setAttribute("action", response.destination);

        const inputElement = document.getElementById("test-input") as HTMLInputElement;
        inputElement.value = response.testResponse;

        form.submit();
      });

Does anyone have insight into why this discrepancy exists?

Answer №1

Have you considered adding quotation marks to the action attribute?

action=${response.destination}
action="${response.destination}"

(and in your <input value>)

Is it necessary to use the <form> element for POSTing to your API?

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