module.exports = { meta: { type: 'suggestion', docs: { description: 'Indentation tabs are not allowed, even in multiline strings, due to WPT lint rules. This rule simply disallows tabs anywhere.', }, schema: [], }, create: context => { const sourceCode = context.getSourceCode(); return { Program: node => { for (let lineIdx = 0; lineIdx < sourceCode.lines.length; ++lineIdx) { const line = sourceCode.lines[lineIdx]; const matches = line.matchAll(/\t/g); for (const match of matches) { context.report({ node, loc: { line: lineIdx + 1, column: match.index }, message: 'Tabs not allowed.', // fixer is hard to implement, so not implemented. }); } } }, }; }, };