Which Selenium locator strategy is most reliable?

Question

id vs css vs xpath vs data-testid — team keeps arguing. What actually holds up on a modern SPA?

Jonas Hansen · Accepted Answer

Order of preference on a modern SPA: 1) data-testid (or another test-only attribute), 2) id when it is stable, 3) CSS selector, 4) XPath only when you truly need text or DOM traversal. Never rely on class chains generated by CSS-in-JS — they change on every deploy.

// Java
By.cssSelector("[data-testid='checkout-btn']")
By.id("email")
By.xpath("//button[normalize-space()='Continue']") // only when needed

Which Selenium locator strategy is most reliable?

1 answer