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HTML
<main id="loading-zone" aria-busy="true">
<p>Loading Level</p>
<div class="card">
<label>
<span class="sr-only">Loading progress</span>
<progress
indeterminate
role="progressbar"
aria-describedby="loading-zone"
tabindex="-1"
>unknown</progress>
</label>
</div>
</main>
CSS
progress {
--_track: hsl(228 100% 90%);
--_track-size: min(10px, 1ex);
--_progress: hsl(228 100% 50%);
--_radius: 1e3px;
--_indeterminate-track: linear-gradient(to right,
var(--_track) 45%,
var(--_progress) 0%,
var(--_progress) 55%,
var(--_track) 0%
);
--_indeterminate-track-size: 225% 100%;
--_indeterminate-track-animation: progress-loading 2s infinite ease;
/* reset */
appearance: none;
border: none;
/* custom style */
position: relative;
height: var(--_track-size);
border-radius: var(--_radius);
overflow: hidden;
@media (prefers-color-scheme: dark) {
--_track: hsl(228 20% 30%);
--_progress: hsl(228 100% 75%);
}
&:focus-visible {
outline-color: var(--_progress);
}
/* Safari/Chromium */
&[value]::-webkit-progress-bar {
background-color: var(--_track);
}
&[value]::-webkit-progress-value {
background-color: var(--_progress);
transition: inline-size .25s ease-out;
}
/* Firefox */
&[value]::-moz-progress-bar {
background-color: var(--_progress);
}
/* indeterminate */
&:indeterminate::after {
content: "";
inset: 0;
position: absolute;
background: var(--_indeterminate-track);
background-size: var(--_indeterminate-track-size);
background-position: right;
animation: var(--_indeterminate-track-animation);
}
/* indeterminate Safari */
&:indeterminate::-webkit-progress-bar {
background: var(--_indeterminate-track);
background-size: var(--_indeterminate-track-size);
background-position: right;
animation: var(--_indeterminate-track-animation);
}
/* indeterminate Firefox */
&:indeterminate::-moz-progress-bar {
background: var(--_indeterminate-track);
background-size: var(--_indeterminate-track-size);
background-position: right;
animation: var(--_indeterminate-track-animation);
}
/* complete */
&:not([max])[value="1"]::before,
&[max="100"][value="100"]::before {
content: "✓";
position: absolute;
inset-block: 0;
inset-inline: auto 0;
display: flex;
align-items: center;
padding-inline-end: max(calc(var(--_track-size) / 4), 3px);
color: white;
font-size: calc(var(--_track-size) / 1.25);
}
}
@keyframes progress-loading {
50% {
background-position: left;
}
}
JS
const progress = document.querySelector('progress')
const zone = document.querySelector('#loading-zone')
const state = {
val: .1
}
const roundDecimals = (val, places) =>
+(Math.round(val + "e+" + places) + "e-" + places)
const setProgress = () => {
// set loading zone status
zone.setAttribute('aria-busy', state.val < 1)
// clear attributes if no value to show
//
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2023-07-05 UTC.
[{
"type": "thumb-down",
"id": "missingTheInformationINeed",
"label":"Missing the information I need"
},{
"type": "thumb-down",
"id": "tooComplicatedTooManySteps",
"label":"Too complicated / too many steps"
},{
"type": "thumb-down",
"id": "outOfDate",
"label":"Out of date"
},{
"type": "thumb-down",
"id": "samplesCodeIssue",
"label":"Samples / code issue"
},{
"type": "thumb-down",
"id": "otherDown",
"label":"Other"
}]
[{
"type": "thumb-up",
"id": "easyToUnderstand",
"label":"Easy to understand"
},{
"type": "thumb-up",
"id": "solvedMyProblem",
"label":"Solved my problem"
},{
"type": "thumb-up",
"id": "otherUp",
"label":"Other"
}]