I have some code that increments each letter of a given word starting from A until reaching the destination letter. You can see the example in the code snippet below. The code works when I target a single div id but I want to make it so it will apply this incrementing text effect to every block of text with the "block" class assigned to it.
$(document).ready(function() {
console.log("ready!");
$('.block').each(function() {
function Letter(table, letter, duration) {
this.table = table;
this.letter = letter;
this.current = 0;
this.delay = duration / tbl.indexOf(letter); // ms
this.time = Date.now();
this.done = false;
}
Letter.prototype.update = function() {
if (this.done) return;
var time = Date.now();
if (time - this.time >= this.delay) {
this.time = time;
if (this.letter === this.table[this.current] || this.current === this.table.length) {
this.done = true;
} else {
this.current++;
}
}
};
var word = $(this).html();
console.log('Word: ' + word);
var tbl = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var letters = [];
word.toUpperCase().split("").forEach(function(l) {
letters.push(new Letter(tbl, l, 2500))
console.log(l);
});
(function loop() {
var txt = "",
isDone = true;
letters.forEach(function(l) {
l.update();
if (!l.done) isDone = false;
txt += l.table[l.current];
});
// output txt
//$("div#d").html(txt);
$(this).parent('.block').html(txt);
if (!isDone) requestAnimationFrame(loop);
else { /* done */ }
})();
});
});
I'm trying to output the incrementing effect onto each text bit with the "block" class assigned to it:
$(this).parent('.block').html(txt);
I am trying to target each "block" class with the above line of code but it is not working. How can I do this?
Notice with this line the "Word" being incremented is whatever falls inside the "block" tag:
var word = $(this).html();
$(document).ready(function() {
console.log("ready!");
$('.block').each(function() {
function Letter(table, letter, duration) {
this.table = table;
this.letter = letter;
this.current = 0;
this.delay = duration / tbl.indexOf(letter); // ms
this.time = Date.now();
this.done = false;
}
Letter.prototype.update = function() {
if (this.done) return;
var time = Date.now();
if (time - this.time >= this.delay) {
this.time = time;
if (this.letter === this.table[this.current] ||
this.current === this.table.length) {
this.done = true;
} else {
this.current++;
}
}
};
var word = $(this).html();
console.log('Word: ' + word);
var tbl = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var letters = [];
word.toUpperCase().split("").forEach(function(l) {
letters.push(new Letter(tbl, l, 2500))
console.log(l);
});
(function loop() {
var txt = "",
isDone = true;
letters.forEach(function(l) {
l.update();
if (!l.done) isDone = false;
txt += l.table[l.current];
});
// output txt
//d.innerHTML = txt;
$("div#d").html(txt);
if (!isDone) requestAnimationFrame(loop);
else { /* done */ }
})();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id=d></div>
<div id="other_spans">
<span class="block">First</span>
<span class="block">Second</span>
<span class="block">Third</span>
You can move Letter
function and tbl
variable outside of .each()
to prevent redefining function, variable at each iteration of elements; create a reference to $(this)
current element, use reference inside of loop
$(document).ready(function() {
console.log("ready!");
var tbl = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
function Letter(table, letter, duration) {
this.table = table;
this.letter = letter;
this.current = 0;
this.delay = duration / tbl.indexOf(letter); // ms
this.time = Date.now();
this.done = false;
}
Letter.prototype.update = function() {
if (this.done) return;
var time = Date.now();
if (time - this.time >= this.delay) {
this.time = time;
if (this.letter === this.table[this.current]
|| this.current === this.table.length) {
this.done = true;
} else {
this.current++;
}
}
};
$(".block").each(function() {
// store reference to current `this` element
var elem = $(this);
var word = elem.html();
console.log("Word: " + word);
var letters = [];
word.toUpperCase().split("")
.forEach(function(l) {
letters.push(new Letter(tbl, l, 2500))
console.log(l);
});
(function loop() {
var txt = "",
isDone = true;
letters.forEach(function(l) {
l.update();
if (!l.done) isDone = false;
txt += l.table[l.current];
});
// `elem` : `this` element at `.each()` iteration
elem.html(txt);
if (!isDone) requestAnimationFrame(loop);
else { /* done */ }
})();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<div id="d"></div>
<div id="other_spans">
<span class="block">First</span>
<span class="block">Second</span>
<span class="block">Third</span>