noImportAssign (since v0.9.0)

This rule is recommended by Rome.

Disallow assigning to imported bindings

Examples

Invalid

jsx

import x from "y";
x = 1;

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:1 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable x is read-only 1 │ import x from "y"; > 2 │ x = 1; │ ^ 3 │ ℹ The variable is imported here > 1 │ import x from "y"; │ ^ 2 │ x = 1; 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

jsx

import y from "y";
[y] = 1;

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:2 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable y is read-only 1 │ import y from "y"; > 2 │ [y] = 1; │ ^ 3 │ ℹ The variable is imported here > 1 │ import y from "y"; │ ^ 2 │ [y] = 1; 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

jsx

import z from "y";
({ z } = 1); /// ```
```js,expect_diagnostic
import a from "y";
[...a] = 1;

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:3:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ unterminated template literal 1 │ import z from "y"; 2 │ ({ z } = 1); /// ``` > 3 │ ```js,expect_diagnostic │ ^^^^^^^^^^^^^^^^^^^^ > 4 │ import a from "y"; > 5 │ [...a] = 1; > 6 │ │ </code></pre>

jsx

import b from "y";
({ ...b } = 1);

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:7 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable b is read-only 1 │ import b from "y"; > 2 │ ({ ...b } = 1); │ ^ 3 │ ℹ The variable is imported here > 1 │ import b from "y"; │ ^ 2 │ ({ ...b } = 1); 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

jsx

import c from "y";
for (c in y) {};

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:6 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable c is read-only 1 │ import c from "y"; > 2 │ for (c in y) {}; │ ^ 3 │ ℹ The variable is imported here > 1 │ import c from "y"; │ ^ 2 │ for (c in y) {}; 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

jsx

import d from "y";
d += 1;

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:1 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable d is read-only 1 │ import d from "y"; > 2 │ d += 1; │ ^ 3 │ ℹ The variable is imported here > 1 │ import d from "y"; │ ^ 2 │ d += 1; 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

jsx

import * as e from "y";
e = 1;

<pre class="language-text"><code class="language-text">suspicious/noImportAssign.js:2:1 <a href="https://docs.rome.tools/lint/rules/noImportAssign">lint/suspicious/noImportAssign</a> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✖ The imported variable e is read-only 1 │ import * as e from "y"; > 2 │ e = 1; │ ^ 3 │ ℹ The variable is imported here > 1 │ import * as e from "y"; │ ^ 2 │ e = 1; 3 │ ℹ Use a local variable instead of reassigning an import. </code></pre>

Lint Rule noImportAssign

noImportAssign (since v0.9.0)

Examples

Invalid

Related links