每个HTML跨度的JavaScript倒数计时器

Question

I have programmatically created <span> tag in my html

I found simple example of javascript to do countdown timer

// set the date we're counting down to
var target_date = new Date("Aug 15, 2019").getTime();

// variables for time units
var days, hours, minutes, seconds;

// get tag element
var countdown = document.getElementById("countdown");

// update the tag with id "countdown" every 1 second
setInterval(function () {

    // find the amount of "seconds" between now and target
    var current_date = new Date().getTime();
    var seconds_left = (target_date - current_date) / 1000;

    // do some time calculations
    days = parseInt(seconds_left / 86400);
    seconds_left = seconds_left % 86400;

    hours = parseInt(seconds_left / 3600);
    seconds_left = seconds_left % 3600;

    minutes = parseInt(seconds_left / 60);
    seconds = parseInt(seconds_left % 60);

    // format countdown string + set tag value
    countdown.innerHTML = days + "d, " + hours + "h, "
    + minutes + "m, " + seconds + "s";  

}, 1000);

But this example let me use only one element

But i need to use this code like

<span onload="this.countdown(300)"></span>

So 300 is seconds which dynamically changing by my script

So after my script work i get on page

 <span onload="this.countdown(150)"></span>
 <span onload="this.countdown(3000)"></span>
 <span onload="this.countdown(4500)"></span>
 <span onload="this.countdown(600)"></span>
 <span onload="this.countdown(390)"></span>

So i need run all this timer at once, how to do that?

Answer 1

Try something like below:

<div class="container">    
<span data-countdown="150"></span>
 <span data-countdown="3000" ></span>
 <span data-countdown="4500"></span>
 <span data-countdown="600"></span>
 <span data-countdown="390"></span>
</div>

on Script:

$('.container').load(function(){
var span =$(this).find('span');
span.countdown(span.attr('data-countdown'));
})

Note: look at logic only