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fix(no-useless-mustaches): Wrong auto-fix for quoted mustaches #1140

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Mar 18, 2025
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5 changes: 5 additions & 0 deletions .changeset/wise-fireants-obey.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"eslint-plugin-svelte": patch
---

fix(no-useless-mustaches): Wrong auto-fix for quoted mustaches
11 changes: 9 additions & 2 deletions packages/eslint-plugin-svelte/src/rules/no-useless-mustaches.ts
Original file line number Diff line number Diff line change
Expand Up @@ -142,14 +142,21 @@ export default createRule('no-useless-mustaches', {
node.parent.key.range[1],
node.parent.value[0].range[0]
);
if (!div.endsWith('"') && !div.endsWith("'")) {
const quote = div.endsWith('"') ? 'quot' : div.endsWith("'") ? 'apos' : null;
if (!quote) {
return [
fixer.insertTextBefore(node.parent.value[0], '"'),
fixer.replaceText(node, unescaped.replace(/"/gu, '"')),
fixer.insertTextAfter(node.parent.value[node.parent.value.length - 1], '"')
];
}
return fixer.replaceText(node, unescaped);

return fixer.replaceText(
node,
quote === 'quot'
? unescaped.replace(/"/gu, '"')
: unescaped.replace(/'/gu, ''')
);
}
return fixer.replaceText(node, unescaped.replace(/</gu, '&lt;').replace(/>/gu, '&gt;'));
}
Expand Down
Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
- message: Unexpected mustache interpolation with a string literal value.
line: 2
column: 17
suggestions: null
- message: Unexpected mustache interpolation with a string literal value.
line: 4
column: 17
suggestions: null
- message: Unexpected mustache interpolation with a string literal value.
line: 6
column: 17
suggestions: null
- message: Unexpected mustache interpolation with a string literal value.
line: 8
column: 17
suggestions: null
Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
<!--prettier-ignore-->
<div data-text="{'\'"'}" />
<!--prettier-ignore-->
<div data-text="{"'\""}" />
<!--prettier-ignore-->
<div data-text='{'\'"'}' />
<!--prettier-ignore-->
<div data-text='{"'\""}' />
Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
<!--prettier-ignore-->
<div data-text="'&quot;" />
<!--prettier-ignore-->
<div data-text="'&quot;" />
<!--prettier-ignore-->
<div data-text='&apos;"' />
<!--prettier-ignore-->
<div data-text='&apos;"' />
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