add frontend/vben from vben-admin-thin

frontend/vben/src/logics/theme/util.ts

@@ -0,0 +1,11 @@
+const docEle = document.documentElement
+export function toggleClass(flag: boolean, clsName: string, target?: HTMLElement) {
+  const targetEl = target || document.body
+  let { className } = targetEl
+  className = className.replace(clsName, '')
+  targetEl.className = flag ? `${className} ${clsName} ` : className
+}
+
+export function setCssVar(prop: string, val: any, dom = docEle) {
+  dom.style.setProperty(prop, val)
+}