30 lines
847 B
JavaScript
30 lines
847 B
JavaScript
'use strict';
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const hasLookbehind = s => s.includes('(?<=') || s.includes('(?<!')
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module.exports = (context, badBrowser) => ({
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'Literal[regex]'(node) {
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if (hasLookbehind(node.regex.pattern)) {
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context.report(node, `RegExp lookbehinds are not supported in ${badBrowser}`)
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}
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},
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'CallExpression[callee.name="RegExp"], NewExpression[callee.name="RegExp"]'(node) {
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const [source] = node.arguments;
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if (
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source &&
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(
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(
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source.type === 'Literal' &&
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typeof source.value === 'string' &&
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hasLookbehind(source.value)
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) ||
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(
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source.type === 'TemplateLiteral' &&
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source.quasis.some(({value: {raw}}) => hasLookbehind(raw))
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)
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)
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) {
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context.report(node, `RegExp lookbehinds are not supported in ${badBrowser}`)
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}
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}
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})
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