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91 lines
3.0 KiB
91 lines
3.0 KiB
4 years ago
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var counter = {
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instances : [],
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init : function (target, seconds, after) {
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// init() : attach countdown timer to target
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// target : ID of target HTML div
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// seconds : seconds to countdown
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// after : what to do after countdown end (function)
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// (A) THIS INSTANCE
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let idx = counter.instances.length;
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counter.instances[idx] = {};
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let inst = counter.instances[idx];
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inst.remain = seconds;
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if (typeof after == "function") { inst.after = after; }
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// (B) GENERATE HTML
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target = document.getElementById(target);
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target.classList.add("countdown");
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inst.wrap = target;
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let gensquare = function(txt){
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let square = document.createElement("div"),
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digits = document.createElement("div"),
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text = document.createElement("div"),
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ltxt = txt.toLowerCase();
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digits.innerHTML = "00";
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text.innerHTML = txt;
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square.classList.add("square");
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square.classList.add(ltxt);
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digits.classList.add("digits");
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text.classList.add("text");
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square.appendChild(digits);
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square.appendChild(text);
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inst[ltxt] = digits;
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return square;
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};
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target.innerHTML = "";
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if (seconds >= 86400) { target.appendChild(gensquare("DAYS")); }
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if (seconds >= 3600) { target.appendChild(gensquare("HOURS")); }
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if (seconds >= 60) { target.appendChild(gensquare("MINUTES")); }
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target.appendChild(gensquare("SECONDS"));
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// (C) TIMER
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inst.timer = setInterval(function(){
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counter.tick(idx);
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}, 1000);
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},
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tick : function(idx){
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// tick() : count down ticker
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// idx : target count down timer
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// (A) TIMER STOP
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let inst = counter.instances[idx];
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inst.remain--;
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if (inst.remain <= 0 ) {
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clearInterval(inst.timer)
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inst.remain = 0;
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}
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// (B) CALCULATE REMAINING TIME
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let secs = inst.remain;
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let days = Math.floor(secs / 86400); // 1 day = 60 secs * 60 mins * 24 hrs
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secs -= days * 86400;
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let hours = Math.floor(secs / 3600); // 1 hr = 60 secs * 60 mins
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secs -= hours * 3600;
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let mins = Math.floor(secs / 60); // 1 min = 60 secs
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secs -= mins * 60;
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// (C) UPDATE HTML
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inst.seconds.innerHTML = secs;
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if (inst.minutes !== undefined) { inst.minutes.innerHTML = mins; }
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if (inst.hours !== undefined) { inst.hours.innerHTML = hours; }
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if (inst.days !== undefined) { inst.days.innerHTML = days; }
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// (D) AFTER TIMER END
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if (inst.remain == 0) {
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if (typeof inst.after == "function") { inst.after(idx); }
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}
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},
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toSecs : function(yr, mth, day, hr, min, sec){
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// toSecs() : convert given date/time to remaining seconds
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// BEWARE - MONTH IS 0 to 11, JAN = 0 > DEC = 11
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let remain = Date.UTC(yr, mth, day, hr, min, sec);
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remain = Math.floor(remain / 1000);
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remain = remain - Math.floor(Date.now() / 1000);
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if (remain < 0) { remain = 0; }
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return remain;
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}
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};
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