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warn on boolean compilerOptions.css #8710

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merged 2 commits into from
Jun 14, 2023
Merged

warn on boolean compilerOptions.css #8710

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8f22895
warn on boolean compilerOptions.css
gtm-nayan Jun 8, 2023
ec6a33a
changeset
gtm-nayan Jun 8, 2023
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5 changes: 5 additions & 0 deletions .changeset/stale-cougars-wink.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'svelte': patch
---

warn on boolean compilerOptions.css
29 changes: 15 additions & 14 deletions packages/svelte/src/compiler/compile/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@ const regex_valid_identifier = /^[a-zA-Z_$][a-zA-Z_$0-9]*$/;
const regex_starts_with_lowercase_character = /^[a-z]/;

let warned_of_format = false;
let warned_boolean_css = false;

/**
* @param {import('../interfaces.js').CompileOptions} options
Expand Down Expand Up @@ -86,23 +87,23 @@ function validate_options(options, warnings) {
toString: () => message
});
}
if (valid_css_values.indexOf(css) === -1) {
throw new Error(
`options.css must be true, false, 'injected', 'external', or 'none' (got '${css}')`
);
}

if (css === true || css === false) {
options.css = css === true ? 'injected' : 'external';
// possibly show this warning once we decided how Svelte 4 looks like
// const message = `options.css as a boolean is deprecated. Use '${options.css}' instead of ${css}.`;
// warnings.push({
// code: 'options-css-boolean-deprecated',
// message,
// filename,
// toString: () => message
// });
// }
if (!warned_boolean_css) {
console.warn(
`compilerOptions.css as a boolean is deprecated. Use '${options.css}' instead of ${css}.`
);
warned_boolean_css = true;
}
}

if (!valid_css_values.includes(options.css)) {
throw new Error(
`compilerOptions.css must be 'injected', 'external' or 'none' (got '${options.css}').`
);
}

if (namespace && valid_namespaces.indexOf(namespace) === -1) {
const match = fuzzymatch(namespace, valid_namespaces);
if (match) {
Expand Down