Add fallback if NexT.boot.motion is failed#953
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Add fallback if NexT.boot.motion is failed
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Pull request overview
Adds defensive fallbacks around NexT’s client-side boot pipeline to prevent the page from remaining hidden when motion initialization fails (notably due to the use-motion CSS gating).
Changes:
- Wraps
NexT.boot.registerEvents()andNexT.boot.refresh()in try/catch blocks with error logging. - Wraps
NexT.boot.motion()integrator bootstrap in try/catch; on failure logs an error, removesuse-motion, and disables motion at runtime.
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| NexT.boot.registerEvents = function() { | ||
| try { | ||
| NexT.utils.registerScrollPercent(); | ||
| NexT.utils.registerCanIUseTag(); | ||
| NexT.utils.updateFooterPosition(); | ||
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| NexT.utils.registerScrollPercent(); | ||
| NexT.utils.registerCanIUseTag(); | ||
| NexT.utils.updateFooterPosition(); | ||
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| // Mobile top menu bar. | ||
| document.querySelector('.site-nav-toggle .toggle').addEventListener('click', event => { | ||
| event.currentTarget.classList.toggle('toggle-close'); | ||
| const siteNav = document.querySelector('.site-nav'); | ||
| if (!siteNav) return; | ||
| siteNav.style.setProperty('--scroll-height', siteNav.scrollHeight + 'px'); | ||
| document.body.classList.toggle('site-nav-on'); | ||
| }); | ||
| // Mobile top menu bar. | ||
| document.querySelector('.site-nav-toggle .toggle').addEventListener('click', event => { | ||
| event.currentTarget.classList.toggle('toggle-close'); |
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| CONFIG.prism && window.Prism.highlightAll(); | ||
| CONFIG.mediumzoom && window.mediumZoom('.post-body :not(a) > img, .post-body > img', { | ||
| background: 'var(--content-bg-color)' | ||
| }); | ||
| CONFIG.lazyload && window.lozad('.post-body img').observe(); | ||
| if (CONFIG.pangu) { | ||
| // Polyfill for requestIdleCallback if not supported | ||
| if (!window.requestIdleCallback) { | ||
| window.requestIdleCallback = function(cb) { | ||
| cb({ | ||
| didTimeout : false, | ||
| timeRemaining: () => 100 | ||
| }); | ||
| }; | ||
| } | ||
| [...document.getElementsByTagName('main')].forEach(e => window.pangu.spacingNode(e)); |
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Pull request overview
Adds runtime fallbacks to prevent pages from remaining hidden when NexT Motion fails, particularly under PJAX navigation, by catching motion bootstrap errors and switching to a static rendering mode.
Changes:
- Wrap Motion integrator bootstrapping in try/catch (initial load and PJAX success) and disable motion on failure.
- Remove the
use-motionbody class on motion failure to restore element visibility. - Add broad error handling around
NexT.boot.registerEvents()andNexT.boot.refresh()to avoid stopping later boot steps.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
source/js/pjax.js |
Adds try/catch around PJAX motion bootstrap and falls back to static mode on errors. |
source/js/next-boot.js |
Adds try/catch around boot phases and motion bootstrap to avoid blank pages when motion fails. |
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| NexT.boot.registerEvents = function() { | ||
| try { | ||
| NexT.utils.registerScrollPercent(); | ||
| NexT.utils.registerCanIUseTag(); | ||
| NexT.utils.updateFooterPosition(); | ||
|
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| NexT.utils.registerScrollPercent(); | ||
| NexT.utils.registerCanIUseTag(); | ||
| NexT.utils.updateFooterPosition(); | ||
|
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||
| // Mobile top menu bar. | ||
| document.querySelector('.site-nav-toggle .toggle').addEventListener('click', event => { | ||
| event.currentTarget.classList.toggle('toggle-close'); | ||
| const siteNav = document.querySelector('.site-nav'); | ||
| if (!siteNav) return; | ||
| siteNav.style.setProperty('--scroll-height', siteNav.scrollHeight + 'px'); | ||
| document.body.classList.toggle('site-nav-on'); | ||
| }); | ||
| // Mobile top menu bar. | ||
| document.querySelector('.site-nav-toggle .toggle').addEventListener('click', event => { | ||
| event.currentTarget.classList.toggle('toggle-close'); |
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| NexT.boot.refresh = function() { | ||
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| /** | ||
| * Register JS handlers by condition option. | ||
| * Need to add config option in Front-End at 'scripts/helpers/next-config.js' file. | ||
| */ | ||
| CONFIG.prism && window.Prism.highlightAll(); | ||
| CONFIG.mediumzoom && window.mediumZoom('.post-body :not(a) > img, .post-body > img', { | ||
| background: 'var(--content-bg-color)' | ||
| }); | ||
| CONFIG.lazyload && window.lozad('.post-body img').observe(); | ||
| if (CONFIG.pangu) { | ||
| // Polyfill for requestIdleCallback if not supported | ||
| if (!window.requestIdleCallback) { | ||
| window.requestIdleCallback = function(cb) { | ||
| cb({ | ||
| didTimeout : false, | ||
| timeRemaining: () => 100 | ||
| }); | ||
| }; | ||
| try { | ||
| // Register JS handlers by condition option. | ||
| // Need to add config option in Front-End at 'scripts/helpers/next-config.js' file. | ||
| CONFIG.prism && window.Prism.highlightAll(); | ||
| CONFIG.mediumzoom && window.mediumZoom('.post-body :not(a) > img, .post-body > img', { | ||
| background: 'var(--content-bg-color)' | ||
| }); | ||
| CONFIG.lazyload && window.lozad('.post-body img').observe(); | ||
| if (CONFIG.pangu) { | ||
| // Polyfill for requestIdleCallback if not supported |
| .add(NexT.motion.middleWares.postList) | ||
| .bootstrap(); | ||
| } catch (error) { | ||
| console.error('NexT Motion Error, fallback to static mode', error); |
| .add(NexT.motion.middleWares.footer) | ||
| .bootstrap(); | ||
| } catch (error) { | ||
| console.error('NexT Motion Error, fallback to static mode', error); |
Coverage Report for CI Build 28000114515Warning Build has drifted: This PR's base is out of sync with its target branch, so coverage data may include unrelated changes. Coverage remained the same at 97.451%Details
Uncovered ChangesNo uncovered changes found. Coverage RegressionsNo coverage regressions found. Coverage Stats
💛 - Coveralls |
stevenjoezhang
approved these changes
Jun 23, 2026
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PR Checklist
PR Type
What is the current behavior?
Document will empty if
NexT.boot.motionis not run or failed.What is the new behavior?
Add try catch to ensure
NexT.boot.motionrun and removeuse-motionif it failed.