update(changedProperties) {
            // Setting properties in `render` should not trigger an update. Since
            // updates are allowed after super.update, it's important to call `render`
            // before that.
            const templateResult = this.render();
            super.update(changedProperties);
            // If render is not implemented by the component, don't call lit-html render
            if (templateResult !== renderNotImplemented) {
                this.constructor
                    .render(templateResult, this.renderRoot, { scopeName: this.localName, eventContext: this });
            }
            // When native Shadow DOM is used but adoptedStyles are not supported,
            // insert styling after rendering to ensure adoptedStyles have highest
            // priority.
            if (this._needsShimAdoptedStyleSheets) {
                this._needsShimAdoptedStyleSheets = false;
                this.constructor._styles.forEach((s) => {
                    const style = document.createElement('style');
                    style.textContent = s.cssText;
                    this.renderRoot.appendChild(style);
                });
            }
        }
/**
         * Updates the element. This method reflects property values to attributes
         * and calls `render` to render DOM via lit-html. Setting properties inside
         * this method will *not* trigger another update.
         * @param _changedProperties Map of changed properties with old values
         */
Updates the element. This method reflects property values to attributes
and calls `render` to render DOM via lit-html. Setting properties inside
this method will *not* trigger another update.
@param _changedProperties Map of changed properties with old values
Updates the element . This method reflects property values to attributes and calls ` render ` to render DOM via lit - html . Setting properties inside this method will * not * trigger another update . @param _changedProperties Map of changed properties with old values
update(changedProperties) {
            const templateResult = this.render();
            super.update(changedProperties);
            if (templateResult !== renderNotImplemented) {
                this.constructor
                    .render(templateResult, this.renderRoot, { scopeName: this.localName, eventContext: this });
            }
            if (this._needsShimAdoptedStyleSheets) {
                this._needsShimAdoptedStyleSheets = false;
                this.constructor._styles.forEach((s) => {
                    const style = document.createElement('style');
                    style.textContent = s.cssText;
                    this.renderRoot.appendChild(style);
                });
            }
        }
update ( changedProperties ) { const templateResult = this . render ( ) ; super . update ( changedProperties ) ; if ( templateResult !== renderNotImplemented ) { this . constructor . render ( templateResult , this . renderRoot , { scopeName : this . localName , eventContext : this } ) ; } if ( this . _needsShimAdoptedStyleSheets ) { this . _needsShimAdoptedStyleSheets = false ; this . constructor . _styles . forEach ( ( s ) => { const style = document . createElement ( 'style' ) ; style . textContent = s . cssText ; this . renderRoot . appendChild ( style ) ; } ) ; } }
Updates the element.
Updates the element .
// Setting properties in `render` should not trigger an update. Since // updates are allowed after super.update, it's important to call `render` // before that. // If render is not implemented by the component, don't call lit-html render // When native Shadow DOM is used but adoptedStyles are not supported, // insert styling after rendering to ensure adoptedStyles have highest // priority.