lib/rules/no-unmodified-loop-condition.js
function checkReferences(variable) {

            // Gets references that exist in loop conditions.
            const conditions = variable
                .references
                .map(toLoopCondition)
                .filter(Boolean);

            if (conditions.length === 0) {
                return;
            }

            // Registers the conditions to belonging groups.
            registerConditionsToGroup(conditions);

            // Check the conditions are modified.
            const modifiers = variable.references.filter(isWriteReference);

            if (modifiers.length > 0) {
                updateModifiedFlag(conditions, modifiers);
            }

            /*
             * Reports the conditions which are not belonging to groups.
             * Others will be reported after all variables are done.
             */
            conditions
                .filter(isUnmodifiedAndNotBelongToGroup)
                .forEach(report);
        }
function checkReferences(variable) {

            // Gets references that exist in loop conditions.
            const conditions = variable
                .references
                .map(toLoopCondition)
                .filter(Boolean);

            if (conditions.length === 0) {
                return;
            }

            // Registers the conditions to belonging groups.
            registerConditionsToGroup(conditions);

            // Check the conditions are modified.
            const modifiers = variable.references.filter(isWriteReference);

            if (modifiers.length > 0) {
                updateModifiedFlag(conditions, modifiers);
            }

            /*
             * Reports the conditions which are not belonging to groups.
             * Others will be reported after all variables are done.
             */
            conditions
                .filter(isUnmodifiedAndNotBelongToGroup)
                .forEach(report);
        }
function checkReferences ( variable ) { // Gets references that exist in loop conditions. const conditions = variable . references . map ( toLoopCondition ) . filter ( Boolean ) ; if ( conditions . length === 0 ) { return ; } // Registers the conditions to belonging groups. registerConditionsToGroup ( conditions ) ; // Check the conditions are modified. const modifiers = variable . references . filter ( isWriteReference ) ; if ( modifiers . length > 0 ) { updateModifiedFlag ( conditions , modifiers ) ; } /*
             * Reports the conditions which are not belonging to groups.
             * Others will be reported after all variables are done.
             */ conditions . filter ( isUnmodifiedAndNotBelongToGroup ) . forEach ( report ) ; }
Finds unmodified references which are inside of a loop condition.
Then reports the references which are outside of groups.

@param {eslint-scope.Variable} variable - A variable to report.
@returns {void}
Finds unmodified references which are inside of a loop condition . Then reports the references which are outside of groups .