eslint-plugin-react
Version:
React specific linting rules for ESLint
82 lines (73 loc) • 2.47 kB
JavaScript
/**
* @fileoverview Disallow or enforce spaces around equal signs in JSX attributes.
* @author ryym
*/
'use strict';
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = function(context) {
var config = context.options[0];
var sourceCode = context.getSourceCode();
/**
* Determines a given attribute node has an equal sign.
* @param {ASTNode} attrNode - The attribute node.
* @returns {boolean} Whether or not the attriute node has an equal sign.
*/
function hasEqual(attrNode) {
return attrNode.type !== 'JSXSpreadAttribute' && attrNode.value !== null;
}
// --------------------------------------------------------------------------
// Public
// --------------------------------------------------------------------------
return {
JSXOpeningElement: function(node) {
node.attributes.forEach(function(attrNode) {
if (!hasEqual(attrNode)) {
return;
}
var equalToken = sourceCode.getTokenAfter(attrNode.name);
var spacedBefore = sourceCode.isSpaceBetweenTokens(attrNode.name, equalToken);
var spacedAfter = sourceCode.isSpaceBetweenTokens(equalToken, attrNode.value);
switch (config) {
default:
case 'never':
if (spacedBefore) {
context.report({
node: attrNode,
loc: equalToken.loc.start,
message: 'There should be no space before \'=\''
});
}
if (spacedAfter) {
context.report({
node: attrNode,
loc: equalToken.loc.start,
message: 'There should be no space after \'=\''
});
}
break;
case 'always':
if (!spacedBefore) {
context.report({
node: attrNode,
loc: equalToken.loc.start,
message: 'A space is required before \'=\''
});
}
if (!spacedAfter) {
context.report({
node: attrNode,
loc: equalToken.loc.start,
message: 'A space is required after \'=\''
});
}
break;
}
});
}
};
};
module.exports.schema = [{
enum: ['always', 'never']
}];