技术需求：可识别SSN并跳过WO-开头工单编号的正则表达式（用于数据掩码）

Got it, let's tackle this SSN masking regex problem where it's incorrectly targeting the number in WO-prefixed work order IDs. The core issue is that the original regex doesn't distinguish between valid SSNs and the 9-digit number following WO-, so it ends up masking both. Here's the breakdown and solution:

Problem Analysis #

Your original regex \b(?!000|666|9)\d{3}[- ]?(?!00)\d{2}[- ]?(?!0000)\d{4}\b correctly validates SSNs (including formats with hyphens, spaces, or no separators), but it doesn't account for WO- prefixed IDs. Since the 9-digit number after WO- fits the "no-separator SSN" pattern, the regex matches it and applies masking—exactly what we need to avoid.

Updated Regular Expression #

We'll add a negative lookbehind assertion to exclude any number that follows WO-. Here's the revised regex:

(?<!WO-)\b(?!000|666|9)\d{3}[- ]?(?!00)\d{2}[- ]?(?!0000)\d{4}\b

What Each Part Does #

• (?<!WO-): This negative lookbehind ensures the matched number is not immediately preceded by WO-, skipping work order IDs entirely.
• The rest of the regex retains your original SSN validation logic:
  • (?!000|666|9)\d{3}: Rejects invalid first three digits (000, 666, or starting with 9)
  • [- ]?: Matches an optional hyphen or space separator
  • (?!00)\d{2}: Rejects middle two digits of 00
  • [- ]?: Another optional separator
  • (?!0000)\d{4}: Rejects last four digits of 0000
  • \b: Ensures we match complete numbers (not partial ones)

Masking Implementation Example (JavaScript) #

To apply the mask, use this replace pattern (works for all modern browsers):

const input = "WO-011493479 011493479 778-62-8144 030 72 7381 757-85-7495 149-13-7317 401318448 003 06 8815 790714615 805 14 1893";
const masked = input.replace(/(?<!WO-)\b(?!000|666|9)(\d{3})[- ]?(?!00)(\d{2})[- ]?(?!0000)(\d{4})\b/g, 'XXX-XX-XXXX');
console.log(masked);

Output:
WO-011493479 XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX XXX-XX-XXXX

Notice that WO-011493479 remains unmasked, while all valid SSNs (including the standalone 011493479) are masked correctly.

Browser Compatibility #

The negative lookbehind (?<!...) is supported in all major modern browsers:

• Chrome 62+
• Firefox 78+
• Safari 12.1+
• Edge 79+
  This meets your requirement for cross-browser compatibility.

内容的提问来源于stack exchange，提问作者Debarshi DasGupta