',
'
Premium'
);
}
return html;
});
```
## Browser Compatibility
### Supported Browsers
| Browser | Minimum Version | Notes |
|---------|----------------|-------|
| Chrome | 60+ | Full support |
| Firefox | 55+ | Full support |
| Safari | 12+ | Full support |
| Edge | 79+ | Full support |
| iOS Safari | 12+ | Mobile support |
| Chrome Mobile | 60+ | Mobile support |
### Polyfills and Fallbacks
```javascript
// Feature detection and polyfills
class FeatureDetection {
static checkFeatures() {
const features = {
fetch: typeof fetch !== 'undefined',
promises: typeof Promise !== 'undefined',
arrowFunctions: true, // Transpiled by Babel
flexbox: this.checkCSS('display', 'flex'),
grid: this.checkCSS('display', 'grid'),
customProperties: this.checkCSS('--custom', 'property')
};
return features;
}
static checkCSS(property, value) {
const element = document.createElement('div');
element.style[property] = value;
return element.style[property] === value;
}
static loadPolyfills() {
const features = this.checkFeatures();
// Load fetch polyfill if needed
if (!features.fetch) {
this.loadScript('https://polyfill.io/v3/polyfill.min.js?features=fetch');
}
// Load Promise polyfill if needed
if (!features.promises) {
this.loadScript('https://polyfill.io/v3/polyfill.min.js?features=Promise');
}
}
static loadScript(src) {
const script = document.createElement('script');
script.src = src;
script.async = true;
document.head.appendChild(script);
}
}
// Initialize polyfills
FeatureDetection.loadPolyfills();
```
### Progressive Enhancement
```javascript
// Progressive enhancement strategy
class ProgressiveEnhancement {
static init() {
// Start with basic functionality
this.setupBasicFeatures();
// Add enhanced features if supported
if (this.modernFeaturesSupported()) {
this.setupModernFeatures();
}
// Add experimental features if available
if (this.experimentalFeaturesSupported()) {
this.setupExperimentalFeatures();
}
}
static setupBasicFeatures() {
// Basic event display without advanced interactions
console.log('Setting up basic features');
}
static setupModernFeatures() {
// Enhanced interactions, animations, etc.
console.log('Setting up modern features');
}
static setupExperimentalFeatures() {
// Cutting-edge features like Web Components, etc.
console.log('Setting up experimental features');
}
static modernFeaturesSupported() {
return (
'IntersectionObserver' in window &&
'requestAnimationFrame' in window &&
CSS.supports('display', 'grid')
);
}
static experimentalFeaturesSupported() {
return (
'customElements' in window &&
'ResizeObserver' in window
);
}
}
// Initialize progressive enhancement
document.addEventListener('DOMContentLoaded', () => {
ProgressiveEnhancement.init();
});
```
This comprehensive component documentation provides developers with all the information needed to understand, customize, and extend the EventBookings plugin's frontend functionality.
