XD Plugin API Known Issues

General Issues

  • Icons may be blurry or missing in the plugin panel if you don't include the full set of sizes (24px, 48px, 96px, 144px, 192px) in your plugin bundle and manifest.
  • Developer/Side-loading Specific
    • Plugin menus and handlers may not be in-sync across documents during development
      • If someone modifies a plugin's files on disk while XD is running, and then opens more windows in XD, any windows that were open before reflect the old version of the plugin while windows that were opened later reflect the new version of the plugin. The menu bar will always reflect the old version of the plugin regardless of which window is current.

Plugin Management

  • If Plugin Manager is open when you invoke Reload Plugins, it will not reflect any changes to the manifest (plugin name, description, icon) until you close & reopen it.

Scenegraph

  • It is possible to set nodes to 0 width or 0 height.
    • Scenenode setters block negative size values but allow 0 size, even though in many cases it is equally nonsensical. We do block 0 size in the UI.
    • In the past, XD's renderer would fail asserts (possibly even crash) with 0-size objects. I couldn't repro that any more, but unless we're covering it well as an officially supported case, it could easily regress again. There are some other minor bugs though, e.g. sharing fails if you have any 0-width/height artboards and bitmap export fails if any of the top-level items you're trying to export are 0-width/height.
  • Longer plugin command names may be truncated in the menu on Windows
    • Workaround: keep your plugin command names short!
  • Keypress / gamepad interactions are not returned to plugins yet when requesting the list of interactions on a scenenode or the entire document.

Assets Panel

  • Plugins can modify the Assets panel contents while running in the background. Do not rely on this - in a future release, it will be blocked. Only make modifications to the document (including Assets panel) while the plugin is running a user-invoked command.

User Interface

  • When the mouse cursor is changed, it may not revert back to its original state in UWP.
  • It is not possible to trigger the emoji selector in a text field on macOS.
  • Many SVGs are known to render in odd ways in the UI. These issues will be addressed in the future, but we would love to hear your reports of any SVGs that don't work, and how you fixed it.
  • When tabbing in a scroll view, the scroll view is not automatically scrolled to ensure the target control is in view (macOS Only).
  • When using <input type="radio" />, be sure to include a name attribute. If you forget, you'll get different behavior on macOS and Windows 10. On macOS, radio buttons will not be exclusive to each other just because they are in the same container, whereas on Windows 10, radio buttons will be exclusive within the same container. As such, you should always use name to determine radio button exclusivity.
  • Emojis are rendered in the font color on Windows 10, instead of using the emoji's colors.
  • When a control in a panel is disabled and enabled, it is no longer reachable via TAB. This may also impact controls added after a panel is shown for the first time.

HTML Elements

  • <option> tags must have a value attribute, or referencing the select's value property will return undefined.
  • <select value="…"/> does not show the value as selected. Instead, get a reference to the element and call setAttribute("value", …) or use the selected attribute on the option tags.
  • If you don’t specify a width for your form, block elements inside may not take up the entire width. Workaround: always set a width for your form elements.
  • forms only support method="dialog". They do not submit to a URL automatically.
  • It is not currently possible to specify the tab order.
  • The size of a <textarea> cannot be set with rows or cols. Use CSS styles height and width respectively.
  • HTML5 input validation is not supported.
  • Images that fail to load will not render any “broken icon” image in place.
  • Input elements do not accept defaultValue.
  • <option> tags do not support disabled attributes.
  • <label for="id"/> is not supported. Wrap <label> around the control instead.
  • <input type="file" /> is not supported.
  • <input type="color" /> is not supported.
  • Using unitless values in width and height attributes are not supported in UXP 3.1. Use px, or CSS styles.
  • <label> uses inline-flex layout semantics in UXP 3.1 mode, with flex-wrap: wrap enabled. If you need to prevent wrapping, use flex-wrap: nowrap on these elements. Note that the default layout behavior is now horizontal not vertical.

Layout

  • When rendering text on a screen that is not HiDPI, descenders may be clipped when using overflow: hidden. The workaround is to add a little bit of padding to the bottom of the element.
  • When rendering inline elements in plugins with a host.minVersion of 21 or better, spaces between elements may be ignored. This is most obvious when using constructs like <p><b>Click this link:</b> <a href="#">link</a></p>. Currently UXP will ignore the space between the b tag and the anchor, resulting in the following visual rendering: Click this link:link instead of Click this link: link. This will be addressed in the next release.
    • To work around this issue, include a space inside one of the tags, like so: <b>Click this link: </b><a href="#">link</a>
  • When rendering inline text that wraps, borders, outlines, and backgrounds only apply to the first line. You should place borders, outlines, and backgrounds on elements with block layout semantics.
  • Mixing inline text with UI controls is unlikely to result in a pleasant appearance. vertical-align is not yet supported, which makes it difficult to properly align widgets and labels. As such, you should use flex or inline-flex when using UI elements.

CSS

  • It is not currently possible to assign multiple border colors to a container.
  • Do not use position: fixed in panels for now; a future update will change its behavior.
  • :active is not currently supported.
  • baseline alignment is not currently supported.
  • The font shorthand CSS rule is not supported.
  • text-transform is not supported
  • In order to clip an image (say, with border-radius: 10px), you must also specify overflow: hidden.
  • CSS transitions and animations are not supported.
  • A solid outline will not render unless a color is also provided. When using outline: solid, be sure to supply an outline color as well.
  • Font sizes do not adjust to dynamic units like vh. As such, if you use font-size: 1vh, and the viewport changes size, the font size will not adjust.
  • Setting a border-color to unset may not reset the color to its initial value.
  • Borders and backgrounds are not drawn correctly when coupled with object-fit.
  • The bottom border may not always render with the same width as the other borders.
  • Underlines may render very thin.
  • calc only works for length properties. Using calc for a color will not work.
  • If you need to override an anchor link color, use a[href] as the selector to override it.

DOM

  • When a dialog is closed, it is not removed from the DOM. This is per spec. If you want the dialog to be removed from the DOM, you must call HTMLDialogElement#remove explicitly.
  • When applying HTML using innerHTML, event handlers and scripts are not parsed. This is by design.

Events

  • Interactive elements do not support Pointer% events
  • keypress and keyup are not currently supported on macOS.

Network I/O

  • On macOS, it is not possible to use self-signed certificates with secure Websockets.
  • Websockets do not support extensions.
  • XHR can only send binary content using an ArrayBuffer – Blob is not supported.
  • XHR does not support cookies.
  • responseURL is not supported on XHR

File I/O

  • Blob is not supported. Use ArrayBuffer instead.

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