64 lines
2.1 KiB
JavaScript
64 lines
2.1 KiB
JavaScript
/**
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* @fileoverview Enforce a new line after jsx elements and expressions.
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* @author Johnny Zabala
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*/
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'use strict';
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const docsUrl = require('../util/docsUrl');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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module.exports = {
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meta: {
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docs: {
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description: 'Enforce a new line after jsx elements and expressions',
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category: 'Stylistic Issues',
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recommended: false,
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url: docsUrl('jsx-newline')
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},
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fixable: 'code'
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},
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create(context) {
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const jsxElementParents = new Set();
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const sourceCode = context.getSourceCode();
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return {
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'Program:exit'() {
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jsxElementParents.forEach((parent) => {
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parent.children.forEach((element, index, elements) => {
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if (element.type === 'JSXElement' || element.type === 'JSXExpressionContainer') {
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const firstAdjacentSibling = elements[index + 1];
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const secondAdjacentSibling = elements[index + 2];
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if (
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firstAdjacentSibling
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&& secondAdjacentSibling
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&& (firstAdjacentSibling.type === 'Literal' || firstAdjacentSibling.type === 'JSXText')
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// Check adjacent sibling has the proper amount of newlines
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&& !/\n\s*\n/.test(firstAdjacentSibling.value)
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) {
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context.report({
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node: secondAdjacentSibling,
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message: 'JSX element should start in a new line',
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fix(fixer) {
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return fixer.replaceText(
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firstAdjacentSibling,
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// double the last newline.
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sourceCode.getText(firstAdjacentSibling)
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.replace(/(\n)(?!.*\1)/g, '\n\n')
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);
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}
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});
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}
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}
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});
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});
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},
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':matches(JSXElement, JSXFragment) > :matches(JSXElement, JSXExpressionContainer)': (node) => {
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jsxElementParents.add(node.parent);
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}
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};
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}
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};
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