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/**
* @fileoverview Prohibit the use of `let` as the loop variable
* in the initialization of for, and the left-hand
* iterator in forIn and forOf loops.
*
* @author Jessica Quynh Tran
*/
'use strict';
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
const message = 'Use of `let` as the loop variable in a for-loop is ' +
'not recommended. Please use `var` instead.';
const forSelector = 'ForStatement[init.kind="let"]';
const forInOfSelector = 'ForOfStatement[left.kind="let"],' +
'ForInStatement[left.kind="let"]';
module.exports = {
create(context) {
const sourceCode = context.getSourceCode();
function report(node) {
context.report({
node,
message,
fix: (fixer) =>
fixer.replaceText(sourceCode.getFirstToken(node), 'var')
});
}
return {
[forSelector]: (node) => report(node.init),
[forInOfSelector]: (node) => report(node.left),
};
}
};
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