fix: add null check in updated() method of sp-number-field

[rubencarvalho]

Description

Fix rare null reference error in sp-number-field when component is removed from DOM in Safari while being focused.

Related issue(s)

• SWC-434

Motivation and context

Prevents errors due to race conditions between component removal and event handling in Safari.

How has this been tested?

• Test case 1

  1. Go here
  2. Do this

• Test case 2

  1. Go here
  2. Do this

• Did it pass in Desktop?

• Did it pass in Mobile?

• Did it pass in iPad?

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Checklist

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• If my change required a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have reviewed at the Accessibility Practices for this feature, see: Aria Practices

Best practices

This repository uses conventional commit syntax for each commit message; note that the GitHub UI does not use this by default so be cautious when accepting suggested changes. Avoid the "Update branch" button on the pull request and opt instead for rebasing your branch against main.

[github-actions]

Branch preview

• Documentation Site
• Storybook

Visual regression test results

When a visual regression test fails (or has previously failed while working on this branch), its results can be found in the following URLs:

• High Contrast Mode | Medium | LTR
• Spectrum | Lightest | Medium | LTR
• Spectrum | Lightest | Medium | RTL
• Spectrum | Lightest | Large | LTR
• Spectrum | Lightest | Large | RTL
• Spectrum | Light | Medium | LTR
• Spectrum | Light | Medium | RTL
• Spectrum | Light | Large | LTR
• Spectrum | Light | Large | RTL
• Spectrum | Dark | Medium | LTR
• Spectrum | Dark | Medium | RTL
• Spectrum | Dark | Large | LTR
• Spectrum | Dark | Large | RTL
• Spectrum | Darkest | Medium | LTR
• Spectrum | Darkest | Medium | RTL
• Spectrum | Darkest | Large | LTR
• Spectrum | Darkest | Large | RTL
• Express | Lightest | Medium | LTR
• Express | Lightest | Medium | RTL
• Express | Lightest | Large | LTR
• Express | Lightest | Large | RTL
• Express | Light | Medium | LTR
• Express | Light | Medium | RTL
• Express | Light | Large | LTR
• Express | Light | Large | RTL
• Express | Dark | Medium | LTR
• Express | Dark | Medium | RTL
• Express | Dark | Large | LTR
• Express | Dark | Large | RTL
• Express | Darkest | Medium | LTR
• Express | Darkest | Medium | RTL
• Express | Darkest | Large | LTR
• Express | Darkest | Large | RTL
• Spectrum-two | Light | Medium | LTR
• Spectrum-two | Light | Medium | RTL
• Spectrum-two | Light | Large | LTR
• Spectrum-two | Light | Large | RTL
• Spectrum-two | Dark | Medium | LTR
• Spectrum-two | Dark | Medium | RTL
• Spectrum-two | Dark | Large | LTR
• Spectrum-two | Dark | Large | RTL

[github-actions]

Lighthouse scores

Category	Latest (report)	Main (report)	Branch (report)
Performance	0.99	0.99	0.99
Accessibility	1	1	1
Best Practices	1	1	1
SEO	1	0.92	0.92
PWA	1	1	1

What is this?

Lighthouse scores comparing the documentation site built from the PR ("Branch") to that of the production documentation site ("Latest") and the build currently on main ("Main"). Higher scores are better, but note that the SEO scores on Netlify URLs are artifically constrained to 0.92.

Transfer Size

Category	Latest	Main	Branch
Total	226.082 kB	214.299 kB 🏆	214.509 kB
Scripts	55.807 kB	49.829 kB 🏆	49.839 kB
Stylesheet	34.299 kB	30.095 kB 🏆	30.249 kB
Document	6.208 kB	5.431 kB 🏆	5.438 kB
Font	126.789 kB	126.595 kB 🏆	126.632 kB

Request Count

Category	Latest	Main	Branch
Total	52	52	52
Scripts	41	41	41
Stylesheet	5	5	5
Document	1	1	1
Font	2	2	2

[coveralls]

Pull Request Test Coverage Report for Build 10717750521

Details

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.002%) to 98.2%

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Totals
Change from base Build 10717486405:	-0.002%
Covered Lines:	32515
Relevant Lines:	32946

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💛 - Coveralls

[TarunAdobe]

Looks great now!!! Thanks

[github-actions]

Tachometer results

Chrome

number-field permalink

basic-test

Version	Bytes	Avg Time	vs remote	vs branch
npm latest	539 kB	66.56ms - 68.51ms	-	faster ✔ 9% - 14% 6.73ms - 11.21ms
branch	516 kB	74.48ms - 78.52ms	slower ❌ 10% - 17% 6.73ms - 11.21ms	-

slider permalink

test-basic

Version	Bytes	Avg Time	vs remote	vs branch
npm latest	495 kB	74.97ms - 76.40ms	-	faster ✔ 2% - 5% 1.92ms - 4.01ms
branch	471 kB	77.88ms - 79.41ms	slower ❌ 3% - 5% 1.92ms - 4.01ms	-

Firefox

number-field permalink

basic-test

Version	Bytes	Avg Time	vs remote	vs branch
npm latest	539 kB	146.85ms - 153.51ms	-	faster ✔ 6% - 11% 9.31ms - 18.21ms
branch	516 kB	160.99ms - 166.89ms	slower ❌ 6% - 12% 9.31ms - 18.21ms	-

slider permalink

test-basic

Version	Bytes	Avg Time	vs remote	vs branch
npm latest	495 kB	162.19ms - 168.09ms	-	faster ✔ 1% - 7% 1.80ms - 11.56ms
branch	471 kB	167.93ms - 175.71ms	slower ❌ 1% - 7% 1.80ms - 11.56ms	-