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style-prop-object.js
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style-prop-object.js
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/**
* @fileoverview Enforce style prop value is an object
* @author David Petersen
*/
'use strict';
var find = require('array.prototype.find');
var variableUtil = require('../util/variable');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: 'Enforce style prop value is an object',
category: '',
recommended: false
},
schema: []
},
create: function(context) {
/**
* @param {object} node A Identifier node
*/
function checkIdentifiers(node) {
var variable = find(variableUtil.variablesInScope(context), function (item) {
return item.name === node.name;
});
if (!variable || !variable.defs[0] || !variable.defs[0].node.init) {
return;
}
if (variable.defs[0].node.init.type === 'Literal') {
context.report(node, 'Style prop value must be an object');
}
}
return {
CallExpression: function(node) {
if (
node.callee
&& node.callee.type === 'MemberExpression'
&& node.callee.property.name === 'createElement'
&& node.arguments.length > 1
) {
if (node.arguments[1].type === 'ObjectExpression') {
var style = find(node.arguments[1].properties, function(property) {
return property.key && property.key.name === 'style' && !property.computed;
});
if (style) {
if (style.value.type === 'Identifier') {
checkIdentifiers(style.value);
} else if (style.value.type === 'Literal' && style.value.value !== null) {
context.report(style.value, 'Style prop value must be an object');
}
}
}
}
},
JSXAttribute: function(node) {
if (!node.value || node.name.name !== 'style') {
return;
}
if (
node.value.type !== 'JSXExpressionContainer'
|| (node.value.expression.type === 'Literal' && node.value.expression.value !== null)
) {
context.report(node, 'Style prop value must be an object');
} else if (node.value.expression.type === 'Identifier') {
checkIdentifiers(node.value.expression);
}
}
};
}
};