数字格式化

function numberFormat(value) {
    let param = {};
    let k = 10000;
    let sizes = ['', '万', '亿', '万亿'];
    let i;
    if (value < k) {
        param.value = value;
        param.unit = '';
    } else {
        i = Math.floor(Math.log(value) / Math.log(k));
        param.value = ((value / Math.pow(k, i))).toFixed(2);
        param.unit = sizes[i];
    }
    return param;
}