function isToday(str){
var d = new Date(str.replace(/-/g,"/"));
var todaysDate = new Date();
if(d.setHours(0,0,0,0) == todaysDate.setHours(0,0,0,0)){
return true;
} else {
return false;
}
}
console.log(isToday('2018-01-22')); //这里的01也可以直接是1
console.log(isToday('2014-07-08'));