I've been trying to add 1% to the width of the div using JS. I want to make it so that the bar's width increases in a smooth way ( I thought about using animations but it didn't work cause I need to specify conditions).
window.onload = function(){
for (let i = 0; i < 5; i++) {
const bar = document.querySelectorAll(".child-bar")[i];
for (let j = 0; j < 82; j++) {
//alert("j" + j);
console.log("bar width: "+ bar.style.width)
bar.style.width += '1%';
}
}
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="skill">
<label for="HTML">HTML</label>
<div class="parent-bar">
<span class="child-bar"></span>
<h4>82%</h4>
</div>
</div>Maybe this example will help you?
window.onload = function() {
document.querySelectorAll(".parent-bar").forEach((el) => {
const barNode = el.querySelector(".child-bar");
const valueNode = el.querySelector("h4");
const max = 82;
const duration = 100;
let value = 0;
const tick = () => {
barNode.style.width = `${value}%`;
valueNode.innerHTML = `${value}%`;
if (value++ < max) setTimeout(tick, duration);
}
tick();
})
}.child-bar {
display: block;
background: black;
height: 1rem;
width: 0;
transition: 0.1s 0s linear;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="skill">
<label for="HTML">HTML</label>
<div class="parent-bar">
<span class="child-bar"></span>
<h4></h4>
</div>
<div class="parent-bar">
<span class="child-bar"></span>
<h4></h4>
</div>
<div class="parent-bar">
<span class="child-bar"></span>
<h4></h4>
</div>
</div>Here's a solution with verbose code and commentary for clarity, using setInterval.
(Note that span elements have display: inline by default, which is why setting their width has no effect.)
// Sets options and calls main function
const myOptions = {
MAX_WIDTH_PERCENT: 82,
FRAME_COUNT: 100,
FRAME_DURATION: 20
};
animateBars(myOptions);
// Defines main function
function animateBars(options){
const
// Destructures options object to make local variables
{ MAX_WIDTH_PERCENT, FRAME_COUNT, FRAME_DURATION } = options,
// Defines function to increment width
increment = (value) => value += MAX_WIDTH_PERCENT / FRAME_COUNT,
// Defines function to update bar (after incrementing width)
incrementAndupdateBar = (bar, oldWidth, timerId) => {
newWidth = Math.min(increment(oldWidth), MAX_WIDTH_PERCENT);
bar.style.width = newWidth + "%";
bar.nextElementSibling.textContent = Math.floor(newWidth) + "%"; // (For demo)
// Stops repeating the setInterval's function
if(newWidth == MAX_WIDTH_PERCENT){
clearInterval(timerId);
}
return newWidth; // Returns updated value
};
// Loops through bars
for(let bar of document.querySelectorAll(".child-bar")){
// Repeatedly updates current bar, keeping track of width as we go
let
width = 0, // Initializes width for the current bar
timerId; // ID for use by setInterval & clearInterval
timerId = setInterval( // (Returns an ID for later use)
// Takes 2 args: a func and a duration (in ms) to delay inbetween
function(){width = incrementAndupdateBar(bar, width, timerId);},
FRAME_DURATION
);
}
}.parent-bar{ width: 300px; border: 1px dotted grey; }
/* spans ignore "width" by default; "inline-block" solves this */
.child-bar{ display: inline-block; height: 1em; background-color: lightgreen; }
h4{ margin: 0; text-align: center; }<div class="parent-bar">
<span class="child-bar"></span>
<h4></h4>
</div>