More concise JS syntax

Co-authored-by: Lucas Garron <[email protected]>

Author: rzhade3

src/template-result.ts

@@ -33,9 +33,7 @@ export class TemplateResult {
       const template = document.createElement('template')
       const end = this.strings.length - 1
       const html = this.strings.reduce((str, cur, i) => str + cur + (i < end ? `{{ ${i} }}` : ''), '')
-      const trustedHtml = TemplateResult.cspTrustedTypesPolicy
-        ? (TemplateResult.cspTrustedTypesPolicy.createHTML(html) as string)
-        : html
+      const trustedHtml = (TemplateResult.cspTrustedTypesPolicy?.createHTML(html) as string | undefined) ?? html
       template.innerHTML = trustedHtml
       templates.set(this.strings, template)
       return template

src/unsafe-html.ts

@@ -6,9 +6,7 @@ import {TemplateResult} from './template-result.js'
 export const unsafeHTML = directive((value: string) => (part: TemplatePart) => {
   if (!(part instanceof NodeTemplatePart)) return
   const template = document.createElement('template')
-  const trustedValue = TemplateResult.cspTrustedTypesPolicy
-    ? (TemplateResult.cspTrustedTypesPolicy.createHTML(value) as string)
-    : value
+  const trustedValue = (TemplateResult.cspTrustedTypesPolicy?.createHTML(value) as string | undefined) ?? value
   template.innerHTML = trustedValue
   const fragment = document.importNode(template.content, true)
   part.replace(...fragment.childNodes)