refactor(ssr): move escapeHtml to shared

packages/shared/__tests__/escapeHtml.spec.ts

@@ -0,0 +1,11 @@
+import { escapeHtml } from '../src'
+
+test('ssr: escapeHTML', () => {
+  expect(escapeHtml(`foo`)).toBe(`foo`)
+  expect(escapeHtml(true)).toBe(`true`)
+  expect(escapeHtml(false)).toBe(`false`)
+  expect(escapeHtml(`a && b`)).toBe(`a && b`)
+  expect(escapeHtml(`"foo"`)).toBe(`"foo"`)
+  expect(escapeHtml(`'bar'`)).toBe(`'bar'`)
+  expect(escapeHtml(`<div>`)).toBe(`&lt;div&gt;`)
+})

packages/shared/src/escapeHtml.ts

@@ -0,0 +1,45 @@
+const escapeRE = /["'&<>]/
+
+export function escapeHtml(string: unknown) {
+  const str = '' + string
+  const match = escapeRE.exec(str)
+
+  if (!match) {
+    return str
+  }
+
+  let html = ''
+  let escaped: string
+  let index: number
+  let lastIndex = 0
+  for (index = match.index; index < str.length; index++) {
+    switch (str.charCodeAt(index)) {
+      case 34: // "
+        escaped = '&quot;'
+        break
+      case 38: // &
+        escaped = '&amp;'
+        break
+      case 39: // '
+        escaped = '&#39;'
+        break
+      case 60: // <
+        escaped = '&lt;'
+        break
+      case 62: // >
+        escaped = '&gt;'
+        break
+      default:
+        continue
+    }
+
+    if (lastIndex !== index) {
+      html += str.substring(lastIndex, index)
+    }
+
+    lastIndex = index + 1
+    html += escaped
+  }
+
+  return lastIndex !== index ? html + str.substring(lastIndex, index) : html
+}

packages/shared/src/index.ts

@@ -8,6 +8,7 @@ export * from './mockWarn'
 export * from './normalizeProp'
 export * from './domTagConfig'
 export * from './domAttrConfig'
+export * from './escapeHtml'
 
 export const EMPTY_OBJ: { readonly [key: string]: any } = __DEV__
   ? Object.freeze({})