feat: angular signals generator improvements

[sidmohanty11]

Description

Adds support for handling:

• Template strings inside templates - converts them to a computed value
• Spread values inside template - converts them to a computed value
• TS as X expressions inside template - converts them to a computed value
• export default class functionality
• dynamic components
• handle dependent signals by setting them onInit
• onMount hook code only runs on the browser after view init
• ngSkipHydration using useMetadata
• helper functions to set attributes and events on an element on arbitrary spread
• typed inputs
• handles computed in two different ways - if it's inside a For context and needs index it uses just functions and if it's not then it uses Angular's computed
• binding functions when passed as props

Fixes:

• Fns getting passed as fn() with callable expression
• arguments of callable expression (fn/method) not updating state.x or props.x to x().

Make sure to follow the PR preparation steps in CONTRIBUTING.md before submitting your PR:

• format the codebase: from the root, run yarn fmt:prettier.
• update all snapshots (in core & CLI): from the root, run yarn test:update
• add Changeset entry: from the root, run yarn g:changeset and follow the CLI instructions. Alternatively, use the Changeset Github Bot to create the file.

[changeset-bot]

🦋 Changeset detected

Latest commit: 5c66772

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@builder.io/mitosis	Minor
@builder.io/mitosis-cli	Minor

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View your CI Pipeline Execution ↗ for commit 5c66772.

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☁️ Nx Cloud last updated this comment at 2025-05-27 10:51:13 UTC

[sidmohanty11]

@samijaber this PR is ready for review. Will create a loom shortly, going through the changes.

@nmerget it would mean a lot if you could take a look too!

[samijaber]

🔥 🚀

[samijaber]

Nice, been meaning to add that logic somewhere. Might even make sense to put it somewhere that applies to all generators. somewhere like

mitosis/packages/core/src/helpers/merge-options.ts

Line 31 in 0a49334

export const initializeOptions = <T extends BaseTranspilerOptions>({

after processTargetBlocks runs, therefore we know if a hook is actually empty for that given target and can delete it completely.

Not for this PR, just a thought for the future

[sidmohanty11]

sure! yeah, saw a bunch of empty hooks inside the codebase mostly due to the usage of useTarget to add code for certain SDKs only. will create a PR for this soon

[nmerget]

@samijaber this PR is ready for review. Will create a loom shortly, going through the changes.

@nmerget it would mean a lot if you could take a look too!

@sidmohanty11 I'm so sorry forgot to check this again. I'll update my own branch and fix some minor issues I found.

I didn't check it deeply, but I think it looks very nice :)