Changing the interval of SetInterval while it's running

Question

I have written a javascript function that uses setInterval to manipulate a string every tenth of a second for a certain number of iterations.

function timer(         


        

Answer 1

This is my way of doing this, i use setTimeout:

var timer = {
    running: false,
    iv: 5000,
    timeout: false,
    cb : function(){},
    start : function(cb,iv){
        var elm = this;
        clearInterval(this.timeout);
        this.running = true;
        if(cb) this.cb = cb;
        if(iv) this.iv = iv;
        this.timeout = setTimeout(function(){elm.execute(elm)}, this.iv);
    },
    execute : function(e){
        if(!e.running) return false;
        e.cb();
        e.start();
    },
    stop : function(){
        this.running = false;
    },
    set_interval : function(iv){
        clearInterval(this.timeout);
        this.start(false, iv);
    }
};

Usage:

timer.start(function(){
    console.debug('go');
}, 2000);

timer.set_interval(500);

timer.stop();