fix(loading): fix loading occur error when change frequently

[gimmyhehe]

PR

修复loading短时间内通过v-if频繁切换，控制台会报错问题

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What is the current behavior?

Issue Number: N/A

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Does this PR introduce a breaking change?

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• No

Other information

Summary by CodeRabbit

• Bug Fixes
  • Improved stability of loading directive by preventing errors when certain elements are missing.

[coderabbitai]

Walkthrough

A conditional check was introduced in the insertDom function within the loading directive implementation to ensure that the el.mask element exists before attempting to append it to the DOM. No changes were made to exported or public APIs.

Changes

File	Change Summary
packages/vue/src/loading/src/directive.ts	Added a check to confirm el.mask exists before appending to DOM.

Poem

A mask for loading, not always there,
Now checked with care before we share.
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packages/vue/src/loading/src/directive.ts

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ESLint: 8.57.1

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

packages/vue/src/loading/src/directive.ts (1)

34-36: Optional: skip redundant appendChild calls

If insertDom is invoked repeatedly while the mask is still attached, parent.appendChild(el.mask) moves the node each time, needlessly touching the DOM and potentially changing stacking order.
Consider adding a containment check:

-if (el.mask) {
-  parent.appendChild(el.mask)
+if (el.mask && !parent.contains(el.mask)) {
+  parent.appendChild(el.mask)
 }

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📥 Commits

Reviewing files that changed from the base of the PR and between 5ed29bf and 91abdee.

📒 Files selected for processing (1)

• packages/vue/src/loading/src/directive.ts (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: PR E2E Test (pnpm test:e2e3)

🔇 Additional comments (1)

packages/vue/src/loading/src/directive.ts (1)

34-36: Null-safety guard eliminates console error — good catch

The added existence check around parent.appendChild(el.mask) safely prevents runtime errors when the mask element has already been torn down during rapid toggles.