javascript implementation of the detailed time reminder information effect method

This article illustrates an example of how javascript implements the effect of a detailed time reminder message. Share with you for your reference. The details are as follows:

We often see personalized time cues on social networks like what your friend updated a few minutes ago, what your friend updated a few days ago.
These little tips are much more human than just showing a certain year and a certain month. We can use different programs to achieve this effect.
This can reduce the pressure on the backend server.

The implementation code of javascript is as follows:

//  This function realizes the more humanized time prompt  

// @param date_str  The time passed, time format such as :2010-12-14 18:36:09

function date_parser_diff_return(date_str){

    var  date=new Date();

    if(typeof(date_str)!='string')return date;

    var date_arr=date_str.split(new RegExp("[:| |-]","ig"));

    var date_obj = new Date(date_arr[0],date_arr[1]-1,date_arr[2],date_arr[3],date_arr[4],date_arr[5]);

    var date_seconddiff=( new Date().getTime()-date_obj.getTime() ) /1000 ;

        date_str_w='';

        if(date_seconddiff <60*30)date_str_w= Math.ceil(date_seconddiff/60)+" Minutes ago  ";

        if(!date_str_w && date_seconddiff <3600)date_str_w= "1 Hours before  ";

        if(!date_str_w && date_seconddiff <3600*2)date_str_w= "2 Hours before  ";

        if(!date_str_w && date_seconddiff <3600*3)date_str_w= "3 Hours before  ";

        if(!date_str_w && date.getFullYear()==date_arr[0] && date.getMonth()==date_arr[1]-1 && date.getDate()==date_arr[2])

                date_str_w= " Today,  "+date_arr[3]+':'+date_arr[4];

        if(!date_str_w && date.getFullYear()==date_arr[0] && date.getMonth()==date_arr[1]-1 && date.getDate()-1==date_arr[2])

                date_str_w= " Yesterday,  "+date_arr[3]+':'+date_arr[4];

        if(!date_str_w && date.getFullYear()==date_arr[0] && date.getMonth()==date_arr[1]-1 && date.getDate()-2==date_arr[2])

                date_str_w= " The day before yesterday  "+date_arr[3]+':'+date_arr[4];

        if(!date_str_w && date.getFullYear()==date_arr[0] && date.getMonth()==date_arr[1]-1 ) 

                date_str_w= (date.getMonth()+1)+" month "+  date_arr[2]+" No.  "+date_arr[3]+':'+date_arr[4];

        if(!date_str_w && date.getFullYear()==date_arr[0]) 

               date_str_w= " This year,  " + date_arr[1]+" month "+  date_arr[2]+" No.  "+date_arr[3]+':'+date_arr[4];

        if(!date_str_w && date.getFullYear()-1==date_arr[0]) 

               date_str_w= " Last year,  " + date_arr[1]+" month "+  date_arr[2]+" No.  "+date_arr[3]+':'+date_arr[4];

        document.write(date_str_w);

};

I hope this article is helpful for you to design javascript program.