@lukeboyle/sync-vars
v1.0.1
Published
Easily sync and update your css variables at runtime from JavaScript
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4
Maintainers
lukeboyleReadme
Sync Vars
In a recent project I found myself setting colour theme variables in my JavaScript. To reduce double handling, I was setting the theme colours like this:
const themeColors = {
primary: {
hex: '#2196f3',
color: 'blue'
},
secondary: {
hex: '#F44336',
color: 'red'
}
};This object was being passed to vue-material to set the theme colours in there, and then I used the function to set my CSS Variables on my root element.
Installation
Yarn
yarn add @lukeboyle/sync-vars
npm
npm install @lukeboyle/sync-vars
API
syncVars
| Argument | Type | Example |
| ----- | ----- | ----- |
| element | HTMLElement | document.querySelector('html') |
| varName | String | primary-color |
| varValue | String | #FEFEFE |
Usage
import syncVar from '@lukeboyle/sync-vars'
const vars = {
'primary-color': 'green',
'primary-border': 'blue'
};
Object.entries(vars).forEach(([varName, varValue]) => {
syncVar(document.querySelector('html'), varName, varValue);
});
CSS Variable Test
The package comes bundled with a feature test for css variables. You can use it like this:
< IE11
import syncVar, { testCSSVariables } from '../../../src/index';
function init() {
// If you give testCSSVariables a function, it will return a bool of the test result
testCSSVariables(response => {
if (response) {
import syncVar from '@lukeboyle/sync-vars'
const vars = {
'primary-color': 'green',
'primary-border': 'blue'
};
Object.entries(vars).forEach(([varName, varValue]) => {
syncVar(document.querySelector('html'), varName, varValue);
});
} else {
console.warn('color-sync: You are using a browser that does not support CSS Variables, upgrade your browser for the full power');
}
});
}
window.addEventListener('load', init);> IE11
import syncVar, { testCSSVariables } from '../../../src/index';
function init() {
testCSSVariables().then(
() => {
syncVar(document.querySelector('html'), 'primary-color', 'red');
},
error => {
console.warn(error);
// 'color-sync: You are using a browser that does not support CSS Variables, upgrade your browser for the full power'
}
);
}
window.addEventListener('load', init);Results in
<body style="--primary-color: green; --primary-border: blue;">
...
</body>Coming Soon
- Keep CSS variables in sync with Javascript