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.

constructor(parameters) {
    const isRenderable = !!(
      parameters.data.hasPopup ||
      parameters.data.titleObj?.str ||
      parameters.data.contentsObj?.str ||
      parameters.data.richText?.str
    );
    super(parameters, { isRenderable, ignoreBorder: true });
    this.containerClassName = "polylineAnnotation";
    this.svgElementName = "svg:polyline";
  }
  render() {
    this.container.className = this.containerClassName;
    
    
    
    const data = this.data;
    const { width, height } = getRectDims(data.rect);
    const svg = this.svgFactory.create(
      width,