数字转化为中文数字

结果：

/**
 * 
 * @param {*} value 数字 
 * @returns 
 */
const intToChinese = (value) => {
    const str = String(value);
    const len = str.length-1;
    const idxs = ['','十','百','千','万','十','百','千','亿','十','百','千','万','十','百','千','亿'];
    const num = ['零','一','二','三','四','五','六','七','八','九'];
    return str.replace(/([1-9]|0+)/g, ( $, $1, idx, full) => {
        let pos = 0;
        if($1[0] !== '0'){
        pos = len-idx;
        if(idx == 0 && $1[0] == 1 && idxs[len-idx] == '十'){
            return idxs[len-idx];
        }
        return num[$1[0]] + idxs[len-idx];
        } else {
        let left = len - idx;
        let right = len - idx + $1.length;
        if(Math.floor(right / 4) - Math.floor(left / 4) > 0){
            pos = left - left % 4;
        }
        if( pos ){
            return idxs[pos] + num[$1[0]];
        } else if( idx + $1.length >= len ){
            return '';
        }else {
            return num[$1[0]]
        }
        }
    });
}
console.log(intToChinese('520'))