Why Is My Vue.js App Throwing a 'DOM Tree Mismatch' Error?

Debugging Vue.js "DOM Tree Mismatch" Error

Issue:

Vue.js applications using Nuxt.js encounter an error indicating a mismatch between client-side and server-rendered DOM trees. This stems from incorrect HTML markup, hindering the hydration process.

Debugging Method:

To pinpoint the problematic element, Utilize Chrome DevTools:

1. Open DevTools: F12

2. Trigger Warning: Load the affected page.

3. Locate Warning: Scroll to the error in the console.

4. Set Breakpoint: Click the hyperlink of the source location (e.g., vue.runtime.esm.js:574) and set a breakpoint on line 574.

5. Recreate Warning: Reload the page or trigger the error again.

6. Navigate Stack Trace: Click one frame down in the stack trace to open the "patch" function.

7. Set Additional Breakpoint: In the hydrate function, locate the assertNodeMatch check and set a breakpoint 15 lines below where it returns false (lines 593-594).

8. Compare Elements: After triggering the warning again, the breakpoint will stop execution. Evaluate elm (server-rendered DOM element) and vnode (virtual DOM node) in the console.

9. Inspect Element: The elm element's HTML representation can be examined to determine the problematic element.

The above is the detailed content of Why Is My Vue.js App Throwing a 'DOM Tree Mismatch' Error?. For more information, please follow other related articles on the PHP Chinese website!