Function addCommas

libs/echarts/echarts-en.simple.js:19332–19339

* add commas after every three numbers * @param {string|number} x * @return {string}

(x)

 * @return {string}
 */
function addCommas(x) {
    if (isNaN(x)) {
        return '-';
    }
    x = (x + '').split('.');
    return x[0].replace(/(\d{1,3})(?=(?:\d{3})+(?!\d))/g, '$1,')
            + (x.length > 1 ? ('.' + x[1]) : '');
}

/**
 * @param {string} str