How to use the custom-card-helpers.applyThemesOnElement function in custom-card-helpers
To help you get started, we’ve selected a few custom-card-helpers examples, based on popular ways it is used in public projects.
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iantrich / list-card / src / list-card.ts View on Github 
protected updated(changedProps): void {
super.updated(changedProps);
if (!this._config || !this.hass) {
return;
}
const oldHass = changedProps.get('hass') as HomeAssistant | undefined;
const oldConfig = changedProps.get('_config') as ListCardConfig | undefined;
if (!oldHass || !oldConfig || oldHass.themes !== this.hass.themes || oldConfig.theme !== this._config.theme) {
applyThemesOnElement(this, this.hass.themes, this._config.theme);
}
}custom-card-helpers
Set of helpful functions and types for Custom Card creators
