fix(unhead): safer handling of input

Author: harlan-zw

packages/unhead/src/utils/dedupe.ts

@@ -37,8 +37,8 @@ export function dedupeKey<T extends HeadTag>(tag: T): string | undefined {
       // open graph props can have multiple tags with the same property
       if (props[n] !== undefined) {
         const propValue = props[n]
-        const isStructured = propValue.includes(':')
-        const isStandardSingle = StandardSingleMetaTags.has(propValue)
+        const isStructured = propValue && typeof propValue === 'string' && propValue.includes(':')
+        const isStandardSingle = propValue && StandardSingleMetaTags.has(propValue)
         const shouldAlwaysDedupe = isStructured || isStandardSingle
         const keyPart = (!shouldAlwaysDedupe && tag.key) ? `:key:${tag.key}` : ''
         return `${name}:${propValue}${keyPart}`

packages/unhead/src/utils/normalize.ts

@@ -9,12 +9,14 @@ function normalizeStyleClassProps(
   const store = key === 'style' ? new Map() : new Set()
 
   function processValue(rawValue: string) {
-    const value = rawValue.trim()
+    if (rawValue == null || rawValue === undefined)
+      return
+    const value = String(rawValue).trim()
     if (!value)
       return
 
     if (key === 'style') {
-      const [k, ...v] = value.split(':').map(s => s.trim())
+      const [k, ...v] = value.split(':').map(s => s ? s.trim() : '')
       if (k && v.length)
         // @ts-expect-error untyped
         store.set(k, v.join(':'))
@@ -38,7 +40,7 @@ function normalizeStyleClassProps(
       if (v && v !== 'false') {
         key === 'style'
           // @ts-expect-error untyped
-          ? store.set(k.trim(), v)
+          ? store.set(String(k).trim(), String(v))
           : processValue(k)
       }
     })