# solid/removed-api
Disallow Solid 1.x APIs that were removed or renamed in Solid 2.0, with migration guidance.
This rule is **off** by default.
[View source](../src/rules/removed-api.ts) · [View tests](../test/rules/removed-api.test.ts)
This rule flags Solid 1.x APIs that were removed or renamed in Solid 2.0. Mechanical renames (`onMount` → `onSettled`, `batch` → `flush`, `mergeProps` → `merge`, `unwrap` → `snapshot`, `equalFn` → `isEqual`, `getListener` → `getObserver`) are auto-fixed, including all references. APIs whose replacement requires a structural rewrite (`createResource`, `on`, `Suspense`, `produce`, etc.) get a prescriptive message describing the 2.0 way instead.
It also handles the module moves: `"solid-js/store"` exports now live in core `"solid-js"`, `"solid-js/web"` became the `"@solidjs/web"` package, and the `classList` prop was removed in favor of `class`, which accepts the same object form natively.
This rule is enabled as an error in the `v2` and `v2-strict` configs. It is not intended for Solid 1.x projects.
## Tests
### Invalid Examples
These snippets cause lint errors, and some can be auto-fixed.
```js
import { onMount } from "solid-js";
onMount(() => console.log("hi"));
// after eslint --fix:
import { onSettled } from "solid-js";
onSettled(() => console.log("hi"));
import { batch } from "solid-js";
batch(() => update());
// after eslint --fix:
import { flush } from "solid-js";
flush(() => update());
import { mergeProps } from "solid-js";
const props2 = mergeProps({ a: 1 }, props);
// after eslint --fix:
import { merge } from "solid-js";
const props2 = merge({ a: 1 }, props);
import { onMount as om } from "solid-js";
om(() => {});
// after eslint --fix:
import { onSettled as om } from "solid-js";
om(() => {});
import { createResource } from "solid-js";
import { on, useTransition } from "solid-js";
import { Index, Suspense, ErrorBoundary } from "solid-js";
import { render } from "solid-js/web";
// after eslint --fix:
import { render } from "@solidjs/web";
import { createStore } from "solid-js/store";
// after eslint --fix:
import { createStore } from "solid-js";
import { createStore, produce } from "solid-js/store";
let el = ;
// after eslint --fix:
let el = ;
let el = ;
```
### Valid Examples
These snippets don't cause lint errors.
```js
import { createSignal, createMemo, createEffect } from "solid-js";
import { merge, omit, flush, snapshot, isEqual, onSettled } from "solid-js";
import {
For,
Repeat,
Show,
Switch,
Match,
Errored,
Loading,
Reveal,
} from "solid-js";
import { createStore, reconcile } from "solid-js";
import { render, Portal, Dynamic } from "@solidjs/web";
import { something } from "somewhere/else";
let el = ;
let el = ;
```