fix: 白屏

scripts/tests/pageTransitionRoots.test.mjs

@@ -0,0 +1,51 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import { compileTemplate, parse } from '@vue/compiler-sfc'
+
+const pages = [
+  ['asset-information', 'div', 'PollingStateDialog', 'pollingStateTarget'],
+  ['device-list', 'ArtTableFullScreen', 'PollingBatchDialog', 'pollingBatchIds'],
+  ['iot-card-management', 'ArtTableFullScreen', 'PollingBatchDialog', 'pollingBatchIds']
+]
+
+for (const [page, rootTag, dialogTag, dialogState] of pages) {
+  test(`${page} keeps its polling dialog inside one transition-compatible page root`, () => {
+    const filename = `src/views/asset-management/${page}/index.vue`
+    const { descriptor, errors } = parse(readFileSync(filename, 'utf8'), { filename })
+    assert.deepEqual(errors, [])
+    const roots = descriptor.template.ast.children.filter((node) => node.type === 1)
+    assert.equal(roots.length, 1, 'sibling polling dialogs turn the page into a Fragment')
+    assert.equal(roots[0].tag, rootTag, 'preserve the existing page/layout root')
+
+    const dialog = roots[0].children.find((node) => node.type === 1 && node.tag === dialogTag)
+    assert.ok(dialog, 'the polling dialog must remain available inside the page root')
+    const condition = dialog.props.find((prop) => prop.type === 7 && prop.name === 'if')
+    assert.equal(condition?.exp.content, dialogState)
+    const close = dialog.props.find(
+      (prop) => prop.type === 7 && prop.name === 'on' && prop.arg?.content === 'close'
+    )
+    assert.equal(close?.exp.content, `${dialogState} = null`)
+
+    // In production, a Fragment root never completes Transition's out-in leave,
+    // leaving KeepAlive on a comment placeholder for every subsequent route.
+    const compiled = compileTemplate({
+      source: descriptor.template.content,
+      filename,
+      id: page,
+      isProd: true,
+      compilerOptions: { expressionPlugins: ['typescript'] }
+    })
+    assert.deepEqual(compiled.errors, [])
+    assert.equal(compiled.ast.codegenNode.type, 13, 'the page must compile to a single VNode')
+    assert.equal(typeof compiled.ast.codegenNode.tag, 'string', 'never compile a Fragment root')
+  })
+}
+
+test('the table page layout provides a native element root for route transitions', () => {
+  const filename = 'src/components/core/tables/ArtTableFullScreen.vue'
+  const { descriptor } = parse(readFileSync(filename, 'utf8'), { filename })
+  const roots = descriptor.template.ast.children.filter((node) => node.type === 1)
+  assert.equal(roots.length, 1)
+  assert.equal(roots[0].tag, 'div')
+})