Lazy emojiRegex

Author: colinhacks

deno/lib/types.ts

@@ -570,7 +570,8 @@ const emailRegex =
 //   /^[a-z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-z0-9-]+(?:\.[a-z0-9\-]+)*$/i;
 
 // from https://thekevinscott.com/emojis-in-javascript/#writing-a-regular-expression
-const emojiRegex = /^(\p{Extended_Pictographic}|\p{Emoji_Component})+$/u;
+const _emojiRegex = `^(\\p{Extended_Pictographic}|\\p{Emoji_Component})+$`;
+let emojiRegex: RegExp;
 
 const ipv4Regex =
   /^(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))$/;
@@ -710,6 +711,9 @@ export class ZodString extends ZodType<string, ZodStringDef> {
           status.dirty();
         }
       } else if (check.kind === "emoji") {
+        if (!emojiRegex) {
+          emojiRegex = new RegExp(_emojiRegex, "u");
+        }
         if (!emojiRegex.test(input.data)) {
           ctx = this._getOrReturnCtx(input, ctx);
           addIssueToContext(ctx, {

src/types.ts

@@ -570,7 +570,8 @@ const emailRegex =
 //   /^[a-z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-z0-9-]+(?:\.[a-z0-9\-]+)*$/i;
 
 // from https://thekevinscott.com/emojis-in-javascript/#writing-a-regular-expression
-const emojiRegex = /^(\p{Extended_Pictographic}|\p{Emoji_Component})+$/u;
+const _emojiRegex = `^(\\p{Extended_Pictographic}|\\p{Emoji_Component})+$`;
+let emojiRegex: RegExp;
 
 const ipv4Regex =
   /^(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))$/;
@@ -710,6 +711,9 @@ export class ZodString extends ZodType<string, ZodStringDef> {
           status.dirty();
         }
       } else if (check.kind === "emoji") {
+        if (!emojiRegex) {
+          emojiRegex = new RegExp(_emojiRegex, "u");
+        }
         if (!emojiRegex.test(input.data)) {
           ctx = this._getOrReturnCtx(input, ctx);
           addIssueToContext(ctx, {