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fix: decode numeric character references in the tertiary ideographic and supplementary private use planes #18903

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fix: decode numeric character references in the tertiary ideographic and supplementary private use planes #18903

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5 changes: 5 additions & 0 deletions .changeset/numeric-character-reference-planes.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'svelte': patch
---

fix: decode numeric character references in the tertiary ideographic and supplementary private use planes
9 changes: 7 additions & 2 deletions packages/svelte/src/compiler/phases/1-parse/utils/html.js
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Expand Up @@ -120,8 +120,8 @@ function validate_code(code, is_attribute_value) {
return code;
}

// supplementary ideographic plane 0x20000 - 0x2ffff
if (code >= 131072 && code <= 196607) {
// supplementary and tertiary ideographic planes 0x20000 - 0x3ffff
if (code >= 131072 && code <= 262143) {
return code;
}

Expand All @@ -130,5 +130,10 @@ function validate_code(code, is_attribute_value) {
return code;
}

// supplementary private use area planes 0xf0000 - 0x10ffff
if (code >= 983040 && code <= 1114111) {
return code;
}

return NUL;
}
3 changes: 3 additions & 0 deletions packages/svelte/tests/runtime-legacy/samples/html-entities/_config.js
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Expand Up @@ -13,6 +13,9 @@ export default test({
<span>A</span>
<span>€</span>
<span>€</span>
<span>\u{30EDD}</span>
<span>\u{F0001}</span>
<span title="\u{30EDD}\u{10FFFD}">x</span>

<span>&amp;stringnotanentity;</span>

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3 changes: 3 additions & 0 deletions packages/svelte/tests/runtime-legacy/samples/html-entities/main.svelte
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Expand Up @@ -9,6 +9,9 @@
<span>&#65;</span>
<span>&#128;</span>
<span>&#128</span>
<span>&#x30EDD;</span>
<span>&#xF0001;</span>
<span title="&#x30EDD;&#x10FFFD;">x</span>

<span>&stringnotanentity;</span>

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