Bump serialize-javascript and @angular-devkit/build-angular

[dependabot]

Removes serialize-javascript. It's no longer used after updating ancestor dependency @angular-devkit/build-angular. These dependencies need to be updated together.

Removes serialize-javascript

Updates @angular-devkit/build-angular from 15.2.11 to 21.2.1

Release notes

Sourced from @​angular-devkit/build-angular's releases.

21.2.1

@​schematics/angular

Commit	Description
	prevent adding test dependencies when minimal option is enabled

@​angular/cli

Commit	Description
	correct dev dependency detection logic in ng add
	disable npm update notifier in package manager host
	ensure group members are updated to targeted version
	ignore unknown files when formatting schematic changes

@​angular-devkit/build-angular

Commit	Description
	update copy-webpack-plugin to v14.0.0

@​angular/build

Commit	Description
	bundle polyfills to preserve execution order in dev server
	conditionally allow vi.mock for non-relative imports
	resolve style include paths relative to ng-package.json in unit-test builder
	treat empty browsers array as undefined in unit-test builder
	fix memory leak in ng serve with i18n

@​angular/ssr

Commit	Description
	improve header validation logic
	introduce DI token to signal route discovery process

21.2.0

@​schematics/angular

Commit	Description
	add a '.prettierrc' file to generated workspaces and add Prettier as dev dependency
	add ng-add support for Vitest browser providers
	add actionable feedback to vitest-browser schematic

@​angular/cli

Commit	Description
	add markdown files to Prettier's formatting list
	automatic formatting files modified by schematics
	integrate file formatting into update migrations
	standardize MCP tools around workspace/project options
	correctly parse scoped packages in yarn classic list output
	enable shell option for Prettier execution on Windows platforms
	quote complex range specifiers in package manager
	renamed files by their new path in the schematic workflow
	simplify Angular version compatibility checks and add special handling for local builds of new major versions
	validate package manager version using semver.valid and throw an error if invalid

... (truncated)

Changelog

Sourced from @​angular-devkit/build-angular's changelog.

21.2.1 (2026-03-05)

@​angular/cli

Commit	Type	Description
ae4c28d00	fix	correct dev dependency detection logic in ng add
465073bc1	fix	disable npm update notifier in package manager host
36270634f	fix	ensure group members are updated to targeted version
d87dba6af	fix	ignore unknown files when formatting schematic changes

@​schematics/angular

Commit	Type	Description
72d466aa0	fix	prevent adding test dependencies when minimal option is enabled

@​angular-devkit/build-angular

Commit	Type	Description
0019d1c8e	fix	update copy-webpack-plugin to v14.0.0

@​angular/build

Commit	Type	Description
6ad860863	fix	bundle polyfills to preserve execution order in dev server
d17397375	fix	conditionally allow vi.mock for non-relative imports
0d49f86ed	fix	resolve style include paths relative to ng-package.json in unit-test builder
584f6a2d9	fix	treat empty browsers array as undefined in unit-test builder
6699cdc9b	perf	fix memory leak in ng serve with i18n

@​angular/ssr

Commit	Type	Description
43a9dfa66	fix	improve header validation logic
dee3717b3	fix	introduce DI token to signal route discovery process

20.3.19 (2026-03-04)

@​angular-devkit/build-angular

Commit	Type	Description

... (truncated)

Commits

• 74e254b release: cut the v21.2.1 release
• 500b47d ci: add issue_labels job to dev-infra workflow
• 33a3172 build: introduce package deprecation metadata and integrate it into the relea...
• 584f6a2 fix(@​angular/build): treat empty browsers array as undefined in unit-test bui...
• 0d49f86 fix(@​angular/build): resolve style include paths relative to `ng-package.json...
• d173973 fix(@​angular/build): conditionally allow vi.mock for non-relative imports
• e265b1c ci: update pull-request labeling action path
• 87a88ba build: update cross-repo angular dependencies
• 62b1500 ci: create gemini code reviewer configuration
• a6d5f33 build: update dependency aspect_rules_jasmine to v2.0.4
• Additional commits viewable in compare view

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