“stringValues"已定义但从未使用过no-unused-vars

我是JS的新手，我正试图在另一个函数内调用函数。当我尝试它时，我得到了lint错误。—stringValues在数字之间插入逗号以显示正确的格式，对于1000它显示为1,000，对于10000它显示为10,000

 return Number(unitsOfNumbers.join('')).stringValues();

提供我的代码和错误如下。

"stringValues" is defined but never used  no-unused-vars

  import {differentCountriesCurrency} from 'sports-input-utils/lib/formatting';
    Object.defineProperty(exports, '__esModule', {
        value: true
    });
    exports.appleBrowser = appleBrowser;
    exports.appleBrowserWithDecimals = appleBrowserWithDecimals;

    function stringValues(x, sep, grp) {
        var sx = (''+x).split('.'), s = '', i, j;
        sep || (sep = ','); // default seperator
        grp || grp === 0 || (grp = 3); // default grouping
        i = sx[0].length;
        while (i > grp) {
            j = i - grp;
            s = sep + sx[0].slice(j, i) + s;
            i = j;
        }
        s = sx[0].slice(0, i) + s;
        sx[0] = s;
        return sx.join('.');
    }
    function appleBrowser(value, parm) {
        var unitsOfNumbers;
        if (!value) {
            return value;
        }
        // extract unitsOfNumbers. if no unitsOfNumbers, fill in a zero.
        unitsOfNumbers = value.match(/'d/g) || ['0'];
        return Number(unitsOfNumbers.join('')).stringValues();
    }
    function appleBrowserWithDecimals(value, parm) {
        var unitsOfNumbers;
        if (!value) {
            return value;
        }
        // extract unitsOfNumbers. if no unitsOfNumbers, fill in a zero.
        unitsOfNumbers = value.match(/'d/g) || ['0'];
        // zero-pad a one-digit input
        if (unitsOfNumbers.length === 1) {
            unitsOfNumbers.unshift('0');
        }
        // add a decimal point
        unitsOfNumbers.splice(unitsOfNumbers.length - 2, 0, '.');
        return Number(unitsOfNumbers.join('')).stringValues();
    }
    //# sourceMappingURL=formatting.js.map
    exports.limitMaximumLength = limitMaximumLength;
    function limitMaximumLength(value, parm) {
        if (value.length < parm) {
            return value;
        } else {
            return value.substring(0, parm);
        }
    }
    exports.differentCountriesCurrencyWithMaxLen = differentCountriesCurrencyWithMaxLen;
    function differentCountriesCurrencyWithMaxLen (value) {
        var isSafari;
        return differentCountriesCurrency(limitMaximumLength(value, 7));
        isSafari = navigator.userAgent.indexOf("Safari") > -1;
        if (isSafari) {
            return appleBrowser(limitMaximumLength(value, 7));
        }
    }