- Refactoring: Avoid unnecessary addEventListener false; change internal

jPicker function to class (used with `new`)
- Linting (ESLint): Add `valid-jsdoc` rule and make fixes; but turn off for
  now due to <https://github.com/eslint/eslint/issues/11036> and
  <https://github.com/eslint/eslint/issues/11037>
- Docs (JSDoc): Add some Markdown for variables, line breaks; tighten checks
  for overly generic types (though allow for `.Function` as in
  `jQuery.Function`) and avoid one previously missed instance

editor/units.js

@@ -144,8 +144,10 @@ export const shortFloat = function (val) {
 };
 
 /**
-* Converts the number to given unit or baseUnit
+* Converts the number to given unit or baseUnit.
 * @function module:units.convertUnit
+* @param {string|Float} val
+* @param {"em"|"ex"|"in"|"cm"|"mm"|"pt"|"pc"|"px"|"%"} [unit]
 * @returns {Float}
 */
 export const convertUnit = function (val, unit) {
@@ -212,7 +214,7 @@ const attrsToConvert = {
 };
 
 /**
-* Converts all applicable attributes to the configured baseUnit
+* Converts all applicable attributes to the configured baseUnit.
 * @function module:units.convertAttrs
 * @param {Element} element - A DOM element whose attributes should be converted
 * @returns {undefined}
@@ -240,7 +242,7 @@ export const convertAttrs = function (element) {
 
 /**
 * Converts given values to numbers. Attributes must be supplied in
-* case a percentage is given
+* case a percentage is given.
 *
 * @function module:units.convertToNum
 * @param {string} attr - Name of the attribute associated with the value
@@ -271,10 +273,11 @@ export const convertToNum = function (attr, val) {
 };
 
 /**
-* Check if an attribute's value is in a valid format
+* Check if an attribute's value is in a valid format.
 * @function module:units.isValidUnit
 * @param {string} attr - The name of the attribute associated with the value
 * @param {string} val - The attribute value to check
+* @param {Element} selectedElement
 * @returns {boolean} Whether the unit is valid
 */
 export const isValidUnit = function (attr, val, selectedElement) {