Attach (recommended) or Link to PDF file [here:] Can't see how to attach a pdf here, but it is simple to create. Add a form object textbox to a pdf and make sure the option for "Multiline" is true.

Steps to reproduce the problem:
1.  Open a document with a Textbox that is set to Multiline.
2. Attempt to hit the Enter key to go to a new line.

What is the expected behavior? The cursor goes to a new line.

What went wrong? It does not go to a new line.

Link to a viewer: It can be reproduced on mozilla.github.io/pdf.js

I corrected the issue by altering the pdf.js file like this
element.addEventListener("keydown", event => { 
[...]
--} else if (event.key === "Enter") {
++ } else if (event.key === "Enter" && !this.data.multiLine) {

Our initial testing is coming through clean, and hopefully something like this code can be committed to the project in the future.

this._setRequired(element, this.data.required);
    element.type = "radio";
    element.name = data.fieldName;
    if (value) {
      element.setAttribute("checked", true);
    }
    element.tabIndex = DEFAULT_TAB_INDEX;
    element.addEventListener("change", event => {
      const { name, checked } = event.target;
      for (const radio of this._getElementsByName(name,  id)) {
        storage.setValue(radio.id, { value: false });
      }
      storage.setValue(id, { value: checked });
    });
    element.addEventListener("resetform", event => {
      const defaultValue = data.defaultFieldValue;
      event.target.checked =
        defaultValue !== null &&
        defaultValue !== undefined &&
        defaultValue === data.buttonValue;
    });
    if (this.enableScripting && this.hasJSActions) {
      const pdfButtonValue = data.buttonValue;
      element.addEventListener("updatefromsandbox", jsEvent => {
        const actions = {
          value: event => {
            const checked = pdfButtonValue === event.detail.value;
            for (const radio of this._getElementsByName(event.target.name)) {
              const curChecked = checked && radio.id === id;
              if (radio.domElement) {