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tabindex-no-positive.js
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tabindex-no-positive.js
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/**
* @fileoverview Enforce tabIndex value is not greater than zero.
* @author Ethan Cohen
*/
// ----------------------------------------------------------------------------
// Rule Definition
// ----------------------------------------------------------------------------
import { getLiteralPropValue, propName } from 'jsx-ast-utils';
import { generateObjSchema } from '../util/schemas';
const errorMessage = 'Avoid positive integer values for tabIndex.';
const schema = generateObjSchema();
export default {
meta: {
docs: {
url: 'https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/tree/HEAD/docs/rules/tabindex-no-positive.md',
description: 'Enforce `tabIndex` value is not greater than zero.',
},
schema: [schema],
},
create: (context) => ({
JSXAttribute: (attribute) => {
const name = propName(attribute).toUpperCase();
// Check if tabIndex is the attribute
if (name !== 'TABINDEX') {
return;
}
// Only check literals because we can't infer values from certain expressions.
const value = Number(getLiteralPropValue(attribute));
// eslint-disable-next-line no-restricted-globals
if (isNaN(value) || value <= 0) {
return;
}
context.report({
node: attribute,
message: errorMessage,
});
},
}),
};