javascript setInterval（）

Question

I have this code:

function noti() {
     document.title = document.title + " 1"
}

setInterval("noti()", 1000)

The problem is it outputs:

My title 1 1 1 1 1 1 1 ..... to infinite.... 1

Is there any possible way to output this as "My title 1"

the noti() function serves as a purpose when everytime an update occurs in the database, whatever is the length gathered from the database it will be outputed into the users title bar .

So, "My title 1", where "My title" is the name of the user and "1" the length coming from the database

Answer 1

If you want to execute noti only once, you should be using setTimeout , not setInterval .

Update: OK, so you want to execute noti continuously but replace the suffix instead of adding it anew each time. Do this with a regular expression replace:

document.title = document.title.replace(/(\b\s*\d+)?$/, " " + num);

See it in action .

Answer 2

Typically something like this is tagged. Usually you'll see something like (1) My title .

In this case it's a simple matter:

function noti(num) { // num is the number of notifications
    document.title = document.title.replace(/^(?:\(\d+\) )?/,"("+num+") ");
}

Answer 3

try:

var ttl = document.title; //initalize title
function noti() {
  document.title = ttl + " 1";
  //if you want to continue setting the title 
  //(so periodically repeat setting document.title) 
  //uncomment the following:
  //setTimeout(noti, 1000);
}

//use a function reference here. 'noti()' will
//cause the interpreter to do an eval
setTimeout(noti, 1000); 

See why you shouldn't use setInterval