Jenkins Version: 2.440.3 (latest LTS as of creation of this ticket)

Issue

• When adding/editing a job, Clicking "Add Build Step" shows an empty view if there happens to have a "File system objects list Parameter" component defined in the "This project is parameterized" section.

Cause

• A javascript error due to the following code in PopperJS (dom-utils/getNodeName.js):

export default function getNodeName(element) {
  return element ? (element.nodeName || '').toLowerCase() : null;
} 

• The error:

Uncaught TypeError: (intermediate value).toLowerCase is not a function
    getNodeName getNodeName.js:2
    getScrollParent getScrollParent.js:6
    getScrollParent getScrollParent.js:15
    getScrollParent getScrollParent.js:15
    getScrollParent getScrollParent.js:15
    getScrollParent getScrollParent.js:15
    getScrollParent getScrollParent.js:15
    getScrollParent getScrollParent.js:15
    listScrollParents listScrollParents.js:19
    setOptions createPopper.js:69
    createPopper createPopper.js:215
    createPopperInstance tippy.esm.js:1167
    mount tippy.esm.js:1204
    show tippy.esm.js:1450
    scheduleShow tippy.esm.js:1240
    onTrigger tippy.esm.js:1014

• The reason:
  • The "File system objects list Parameter" block has a <select> whose name value is "nodeName".  So as the stack is traversing the elements, and "getNodeName()" is invoked, that function assumes the element.nodeName is a string, but what ends up being returned once it hits the <select> is a reference to the <select> due to its name being "nodeName".

Expected Behavior

• The popup of the possible build steps to add should show, instead of being a blank view caused by the javascript error.