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fix: theme flash

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Cory Dransfeldt 2024-02-17 20:02:25 -08:00
parent cf99fba91c
commit 422ac5fb79
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5 changed files with 78 additions and 38 deletions
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2
package.json
View file

@ -1,6 +1,6 @@
{
"name": "coryd.dev",
"version": "5.9.1",
"version": "5.9.2",
"description": "The source for my personal site. Built using 11ty and hosted on Netlify.",
"type": "module",
"scripts": {

8
src/_includes/base.liquid
View file

@ -104,7 +104,9 @@
</script>
{% endif %}
<script defer data-domain="coryd.dev" src="/js/script.js"></script>
<script>window.plausible = window.plausible || function() { (window.plausible.q = window.plausible.q || []).push(arguments) }</script>
<script>
window.plausible = window.plausible || function() { (window.plausible.q = window.plausible.q || []).push(arguments) }
</script>
<noscript>
<style>
.client-side {
@ -114,6 +116,10 @@
</noscript>
</head>
<body>
{% capture js %}
{% render "../assets/scripts/theme.js" %}
{% endcapture %}
<script>{{ js }}</script>
{{ content }}
{% capture js %}
{% render "../assets/scripts/index.js" %}

22
src/assets/scripts/index.js
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@ -42,26 +42,16 @@ if (window.location.hostname !== 'localhost') {
;(async function() {
const btn = document.querySelector('.theme__toggle');
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
const currentTheme = localStorage?.getItem('theme');
let theme;
if (!currentTheme) localStorage?.setItem('theme', (prefersDarkScheme ? 'dark' : 'light'))
if (currentTheme === 'dark') {
document.body.classList.toggle('theme__dark');
} else if (currentTheme === 'light') {
document.body.classList.toggle('theme__light');
} else if (prefersDarkScheme) {
document.body.classList.toggle('theme__dark');
} else if (!prefersDarkScheme) {
document.body.classList.toggle('theme__light');
}
btn.addEventListener('click', () => {
document.body.classList.toggle('theme__light');
document.body.classList.toggle('theme__dark');
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
const currentTheme = localStorage?.getItem('theme');
let theme;
if (!currentTheme) localStorage?.setItem('theme', (prefersDarkScheme ? 'dark' : 'light'))
if (prefersDarkScheme) {
theme = document.body.classList.contains('theme__light') ? 'light' : 'dark';
} else {

24
src/assets/scripts/theme.js Normal file
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@ -0,0 +1,24 @@
;(function() {
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
const currentTheme = localStorage?.getItem('theme');
let theme;
if (!currentTheme) localStorage?.setItem('theme', (prefersDarkScheme ? 'dark' : 'light'))
if (currentTheme === 'dark') {
document.body.classList.add('theme__dark');
} else if (currentTheme === 'light') {
document.body.classList.add('theme__light');
} else if (prefersDarkScheme) {
document.body.classList.add('theme__dark');
} else if (!prefersDarkScheme) {
document.body.classList.add('theme__light');
}
if (prefersDarkScheme) {
theme = document.body.classList.contains('theme__light') ? 'light' : 'dark';
} else {
theme = document.body.classList.contains('theme__dark') ? 'dark' : 'light';
}
localStorage?.setItem('theme', theme);
})()

60
src/posts/2024/adding-a-light-dark-theme-toggle.md
View file

@ -36,33 +36,51 @@ The `client-side` class above hides the button should the user have JavaScript d
</noscript>
```
And JavaScript is used to control the behavior of the toggle:
And JavaScript is used to control the behavior of the toggle — first, in the `<body>` of my base template:
{% raw %}
```liquid
{% capture js %}
{% render "../assets/scripts/theme.js" %}
{% endcapture %}
<script>{{ js }}</script>
```
{% endraw %}
Where `theme.js` sets the initial state:
```javascript
;(async function() {
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
const currentTheme = localStorage?.getItem('theme');
if (currentTheme === 'dark') {
document.body.classList.add('theme__dark');
} else if (currentTheme === 'light') {
document.body.classList.add('theme__light');
} else if (prefersDarkScheme) {
document.body.classList.add('theme__dark');
} else if (!prefersDarkScheme) {
document.body.classList.add('theme__light');
}
})()
```
With the following JavaScript set in `assets/scripts/index.js` to add the `click` event listener for the theme toggle:
```javascript
;(async function() {
const btn = document.querySelector('.theme__toggle');
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches; // check the user's OS appearance preference
const currentTheme = localStorage?.getItem('theme'); // check if a theme has been set
let theme;
if (!currentTheme) localStorage?.setItem('theme', (prefersDarkScheme ? 'dark' : 'light')) // if a theme hasn't been set, set one based on their OS preference
// set the body class based on the derived preferences above
if (currentTheme === 'dark') {
document.body.classList.toggle('theme__dark');
} else if (currentTheme === 'light') {
document.body.classList.toggle('theme__light');
} else if (prefersDarkScheme) {
document.body.classList.toggle('theme__dark');
} else if (!prefersDarkScheme) {
document.body.classList.toggle('theme__light');
}
// allow the user to toggle the theme by clicking the theme button
btn.addEventListener('click', () => {
document.body.classList.toggle('theme__light');
document.body.classList.toggle('theme__dark');
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
const currentTheme = localStorage?.getItem('theme');
let theme;
if (!currentTheme) localStorage?.setItem('theme', (prefersDarkScheme ? 'dark' : 'light'))
if (prefersDarkScheme) {
theme = document.body.classList.contains('theme__light') ? 'light' : 'dark';
} else {
@ -138,4 +156,6 @@ Finally, the theme is updated based on the body class applied by the JavaScript,
}
```
With those changes in place, visitors can toggle whichever theme they'd prefer and their preference is persisted in `localStorage` should it be available.
With those changes in place, visitors can toggle whichever theme they'd prefer and their preference is persisted in `localStorage` should it be available.
**EDIT:** Many thanks to [Tixie Salander](https://mastodon.guerilla.studio/@tixie) for [guiding me to a solution that improves the initial load experience](https://mastodon.guerilla.studio/@tixie/111950371813634672).