日期格式化

function dateFormateStr(obj){

    console.log(typeof obj.getMonth());

if(Number(obj.getMonth()) < 9){

    return obj.getFullYear() + "-0" + (obj.getMonth() + 1) + "-" + obj.getDate() + " " + obj.getHours() + ":" + obj.getMinutes() + ":" + obj.getSeconds();

}else{

return obj.getFullYear() + "-" + (obj.getMonth() + 1) + "-" + obj.getDate() + " " + obj.getHours() + ":" + obj.getMinutes() + ":" + obj.getSeconds();

}

}

function dateFormateNum (obj) {

if(Number(obj.getMonth()) < 9){

return Number(obj.getFullYear() + "0" + (obj.getMonth() + 1));

}else{

return Number(obj.getFullYear() + "" + (obj.getMonth() + 1));

}

}

let a = new Date();

a.setMonth(10);

console.log(dateFormateStr(a));

console.log(dateFormateNum(a),typeof dateFormateNum(a));