orionsoft-react-scripts
Version:
Orionsoft Configuration and scripts for Create React App.
74 lines (61 loc) • 2.09 kB
JavaScript
;
var _jsxAstUtils = require('jsx-ast-utils');
module.exports = {
meta: {
docs: {},
schema: [{
oneOf: [{ type: 'string' }, {
type: 'array',
items: {
type: 'string'
},
minItems: 1,
uniqueItems: true
}]
}]
},
create: function create(context) {
return {
JSXOpeningElement: function JSXOpeningElement(node) {
var typeCheck = ['img'].concat(context.options[0]);
var nodeType = (0, _jsxAstUtils.elementType)(node);
// Only check 'img' elements and custom types.
if (typeCheck.indexOf(nodeType) === -1) {
return;
}
var roleProp = (0, _jsxAstUtils.getProp)(node.attributes, 'role');
var roleValue = (0, _jsxAstUtils.getPropValue)(roleProp);
var isPresentation = roleProp && typeof roleValue === 'string' && roleValue.toLowerCase() === 'presentation';
if (isPresentation) {
return;
}
var altProp = (0, _jsxAstUtils.getProp)(node.attributes, 'alt');
// Missing alt prop error.
if (altProp === undefined) {
context.report({
node: node,
message: nodeType + ' elements must have an alt prop or use role="presentation".'
});
return;
}
// Check if alt prop is undefined.
var altValue = (0, _jsxAstUtils.getPropValue)(altProp);
var isNullValued = altProp.value === null; // <img alt />
if (altValue && !isNullValued || altValue === '') {
return;
}
// Undefined alt prop error.
context.report({
node: node,
message: 'Invalid alt value for ' + nodeType + '. Use alt="" or role="presentation" for presentational images.'
});
}
};
}
}; /**
* @fileoverview Enforce img tag uses alt attribute.
* @author Ethan Cohen
*/
// ----------------------------------------------------------------------------
// Rule Definition
// ----------------------------------------------------------------------------