Update

Server/public/js/libraries/cssTools.js

@@ -0,0 +1,35 @@
+
+export default class CssTools {
+
+    static applyCSS(element,id,outerclass,classlisthint) {
+        // Return if no CSS to apply
+        if (classlisthint==null || (outerclass==null && id==null)) {
+            return 
+        }
+
+        let outerClassNames = outerclass.split(" ").map(x => "."+x)
+        let outerCssSelectors = [...outerClassNames,"#"+id]
+
+        let styleSheets = document.styleSheets
+        let l = styleSheets.length
+        for (let i=0; i<l; i++) {
+            let sheet = styleSheets[i]
+            let name = sheet.href.split("/").at(-1).split(".")[0]
+            if (name===classlisthint) {
+                for (let outerCss of outerCssSelectors) {
+                    for (let rule of sheet.cssRules) {
+                        if (rule.selectorText==outerCss) {
+                            let styleRule = rule.style
+                            let vals = Object.values(styleRule)
+                            for (let val of vals) {
+                                element.style[val] = styleRule[val]
+                            }
+                        }
+                    }
+                }
+                break
+            }
+        }
+    }
+
+}