eslint-plugin-svelte
Version:
ESLint plugin for Svelte using AST
81 lines (80 loc) • 3.24 kB
JavaScript
import { createRule } from '../utils/index.js';
export default createRule('spaced-html-comment', {
meta: {
docs: {
description: 'enforce consistent spacing after the `<!--` and before the `-->` in a HTML comment',
category: 'Stylistic Issues',
recommended: false,
conflictWithPrettier: false
},
fixable: 'whitespace',
schema: [
{
enum: ['always', 'never']
}
],
messages: {
expectedSpaceBefore: "Expected space or tab before '-->' in comment.",
expectedSpaceAfter: "Expected space or tab after '<!--' in comment.",
unexpectedSpaceBefore: "Unexpected space or tab before '-->' in comment.",
unexpectedSpaceAfter: "Unexpected space or tab after '<!--' in comment."
},
type: 'layout'
},
create(context) {
// Unless the first option is never, require a space
const requireSpace = context.options[0] !== 'never';
return {
SvelteHTMLComment(node) {
if (!node.value.trim()) {
return;
}
if (requireSpace) {
if (/^\S/u.test(node.value)) {
context.report({
node,
messageId: 'expectedSpaceAfter',
fix(fixer) {
return fixer.insertTextBeforeRange([node.range[0] + 4, node.range[1]], ' ');
}
});
}
if (/\S$/u.test(node.value)) {
context.report({
node,
messageId: 'expectedSpaceBefore',
fix(fixer) {
return fixer.insertTextAfterRange([node.range[0], node.range[1] - 3], ' ');
}
});
}
}
else {
const beginSpaces = /^[^\S\n\r]/u.exec(node.value)?.[0];
if (beginSpaces) {
context.report({
node,
messageId: 'unexpectedSpaceAfter',
fix(fixer) {
return fixer.removeRange([
node.range[0] + 4,
node.range[0] + 4 + beginSpaces.length
]);
}
});
}
const endSpaces = /(?<=\S)[^\S\n\r]$/u.exec(node.value)?.[0];
if (endSpaces) {
context.report({
node,
messageId: 'unexpectedSpaceBefore',
fix(fixer) {
return fixer.removeRange([node.range[1] - 3 - endSpaces.length, node.range[1] - 3]);
}
});
}
}
}
};
}
});