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@ -1,9 +1,10 @@
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import { add_render_callback, flush, flush_render_callbacks, schedule_update, dirty_components } from './scheduler';
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import { add_render_callback, flush, flush_render_callbacks, schedule_update, dirty_components, tick } from './scheduler';
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import { current_component, set_current_component } from './lifecycle';
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import { current_component, set_current_component } from './lifecycle';
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import { blank_object, is_empty, is_function, run, run_all, noop } from './utils';
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import { blank_object, is_empty, is_function, run, run_all, noop } from './utils';
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import { children, detach, start_hydrating, end_hydrating } from './dom';
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import { children, detach, start_hydrating, end_hydrating, set_custom_element_data, get_custom_elements_slots, insert } from './dom';
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import { transition_in } from './transitions';
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import { transition_in } from './transitions';
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import { T$$ } from './types';
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import { T$$ } from './types';
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import { ComponentType } from './dev';
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export function bind(component, name, callback) {
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export function bind(component, name, callback) {
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const index = component.$$.props[name];
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const index = component.$$.props[name];
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@ -21,29 +22,27 @@ export function claim_component(block, parent_nodes) {
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block && block.l(parent_nodes);
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block && block.l(parent_nodes);
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}
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}
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export function mount_component(component, target, anchor, customElement) {
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export function mount_component(component, target, anchor) {
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const { fragment, after_update } = component.$$;
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const { fragment, after_update } = component.$$;
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fragment && fragment.m(target, anchor);
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fragment && fragment.m(target, anchor);
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if (!customElement) {
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// onMount happens before the initial afterUpdate
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// onMount happens before the initial afterUpdate
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add_render_callback(() => {
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add_render_callback(() => {
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const new_on_destroy = component.$$.on_mount.map(run).filter(is_function);
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const new_on_destroy = component.$$.on_mount.map(run).filter(is_function);
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// if the component was destroyed immediately
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// if the component was destroyed immediately
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// it will update the `$$.on_destroy` reference to `null`.
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// it will update the `$$.on_destroy` reference to `null`.
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// the destructured on_destroy may still reference to the old array
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// the destructured on_destroy may still reference to the old array
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if (component.$$.on_destroy) {
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if (component.$$.on_destroy) {
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component.$$.on_destroy.push(...new_on_destroy);
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component.$$.on_destroy.push(...new_on_destroy);
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} else {
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} else {
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// Edge case - component was destroyed immediately,
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// Edge case - component was destroyed immediately,
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// most likely as a result of a binding initialising
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// most likely as a result of a binding initialising
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run_all(new_on_destroy);
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run_all(new_on_destroy);
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}
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}
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component.$$.on_mount = [];
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component.$$.on_mount = [];
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});
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});
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}
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after_update.forEach(add_render_callback);
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after_update.forEach(add_render_callback);
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}
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}
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@ -137,7 +136,7 @@ export function init(component, options, instance, create_fragment, not_equal, p
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}
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}
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if (options.intro) transition_in(component.$$.fragment);
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if (options.intro) transition_in(component.$$.fragment);
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mount_component(component, options.target, options.anchor, options.customElement);
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mount_component(component, options.target, options.anchor);
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end_hydrating();
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end_hydrating();
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flush();
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flush();
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}
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}
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@ -148,59 +147,202 @@ export function init(component, options, instance, create_fragment, not_equal, p
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export let SvelteElement;
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export let SvelteElement;
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if (typeof HTMLElement === 'function') {
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if (typeof HTMLElement === 'function') {
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SvelteElement = class extends HTMLElement {
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SvelteElement = class extends HTMLElement {
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$$: T$$;
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private $$component?: SvelteComponent;
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$$set?: ($$props: any) => void;
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private $$connected = false;
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constructor() {
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private $$data = {};
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private $$reflecting = false;
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constructor(
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private $$componentCtor: ComponentType,
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private $$slots: string[],
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) {
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super();
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super();
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this.attachShadow({ mode: 'open' });
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this.attachShadow({ mode: 'open' });
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}
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}
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connectedCallback() {
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addEventListener(type: string, listener: any, options?: any): void {
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const { on_mount } = this.$$;
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// We can't determine upfront if the event is a custom event or not, so we have to
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this.$$.on_disconnect = on_mount.map(run).filter(is_function);
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// listen to both. If someone uses a custom event with the same name as a regular
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// browser event, this fires twice - we can't avoid that.
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this.$$component!.$on(type, listener);
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super.addEventListener(type, listener, options);
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}
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// @ts-ignore todo: improve typings
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connectedCallback() {
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for (const key in this.$$.slotted) {
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this.$$connected = true;
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// @ts-ignore todo: improve typings
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if (!this.$$component) {
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this.appendChild(this.$$.slotted[key]);
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for (const attribute of this.attributes) {
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// this.$$data takes precedence over this.attributes
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if (!(attribute.name in this.$$data)) {
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this.$$data[attribute.name] = attribute.value;
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}
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}
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function create_slot(name: string) {
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return () => {
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let node: HTMLSlotElement;
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return {
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c: function create() {
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node = document.createElement('slot');
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if (name !== 'default') {
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node.setAttribute('name', name);
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}
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},
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m: function mount(target: HTMLElement, anchor?: HTMLElement) {
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insert(target, node, anchor);
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},
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d: function destroy(detaching: boolean) {
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if (detaching) {
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detach(node)
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}
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},
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$$c_e: true
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};
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};
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}
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let $$slots: Record<string, any> = {};
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const existing_slots = get_custom_elements_slots(this);
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for (const name of this.$$slots) {
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if (name in existing_slots) {
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$$slots[name] = [create_slot(name)];
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}
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}
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// Dilemma: We need to set the component props eagerly or they have the wrong value for actions/onMount etc.
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// Boolean attributes are represented by the empty string, and we don't know if they represent boolean or string props.
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this.$$component = new this.$$componentCtor({
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target: this.shadowRoot!,
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props: {
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$$slots,
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$$scope: {
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ctx: []
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}
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}
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});
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// ensures that <foo-bar boolean-attribute /> works correctly
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Object.keys(this.$$data).forEach(key => {
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set_custom_element_data(this, key, this.$$data[key]);
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this.$$data[key] = this[key]; // "" -> true for boolean attributes
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});
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}
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}
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}
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}
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attributeChangedCallback(attr, _oldValue, newValue) {
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// TODO we don't need this when working within Svelte code, but for compatibility of people using this outside of Svelte
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this[attr] = newValue;
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// and setting attributes through setAttribute etc, this is probably helpful
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attributeChangedCallback(attr: string, _oldValue: any, newValue: any) {
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if (this.$$reflecting) return;
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set_custom_element_data(this.$$data, attr, newValue);
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this.$$component![attr] = this.$$data;
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}
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}
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disconnectedCallback() {
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disconnectedCallback() {
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run_all(this.$$.on_disconnect);
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this.$$connected = false;
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// In a microtask, because this could be a move within the DOM
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tick().then(() => {
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if (!this.$$connected) {
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this.$$component!.$destroy();
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this.$$component = undefined;
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}
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});
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}
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}
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};
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}
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$destroy() {
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/**
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destroy_component(this, 1);
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* Attribute value types that should be reflected to the DOM. Helpful
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this.$destroy = noop;
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* for people relying on the custom element's attributes to be present,
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}
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* for example when using a CSS selector which relies on an attribute.
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*/
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const should_reflect = ['string', 'number', 'boolean'];
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$on(type, callback) {
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function camelToHyphen(str: string) {
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// TODO should this delegate to addEventListener?
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return str.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
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if (!is_function(callback)) {
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}
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return noop;
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/**
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* Turn a Svelte component into a custom element.
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* @param Component A Svelte component constructor
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* @param props The props to observe
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* @param slots The slots to create
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* @param accessors Other accessors besides the ones for props the component has
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* @param styles Additional styles to apply to the shadow root (not needed for Svelte components compiled with `customElement: true`)
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* @returns A custom element class
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*/
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export function create_custom_element(
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Component: ComponentType,
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props: string[],
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slots: string[],
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accessors: string[],
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styles?: string,
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) {
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const Class = class extends SvelteElement {
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constructor() {
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super(Component, slots);
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if (styles) {
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const style = document.createElement('style');
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style.textContent = styles;
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this.shadowRoot!.appendChild(style);
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}
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}
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const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
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}
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callbacks.push(callback);
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return () => {
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static get observedAttributes() {
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const index = callbacks.indexOf(callback);
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return props;
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if (index !== -1) callbacks.splice(index, 1);
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};
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}
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}
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};
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$set($$props) {
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function createProperty(name: string, prop: string) {
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if (this.$$set && !is_empty($$props)) {
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Object.defineProperty(Class.prototype, name, {
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this.$$.skip_bound = true;
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get() {
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this.$$set($$props);
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return this.$$component && prop in this.$$component
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this.$$.skip_bound = false;
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? this.$$component[prop]
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: this.$$data[prop];
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},
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set(value) {
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this.$$data[prop] = value;
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if (this.$$component) {
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if(should_reflect.indexOf(typeof value) !== -1) {
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this.$$reflecting = true;
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if (value === false || value == null) {
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this.removeAttribute(prop);
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} else {
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this.setAttribute(prop, value);
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}
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this.$$reflecting = false;
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}
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this.$$component[prop] = value;
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}
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}
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}
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})
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}
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props.forEach((prop) => {
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createProperty(prop, prop);
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// <c-e camelCase="foo" /> will be ce.camcelcase = "foo"
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const lower = prop.toLowerCase();
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if (lower !== prop) {
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createProperty(lower, prop);
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}
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}
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};
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// also support hyphenated version where <c-e camel-case="foo" /> will be ce['camel-case'] = "foo"
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const hyphen = camelToHyphen(prop);
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if (hyphen !== lower) {
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createProperty(hyphen, prop)
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}
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});
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accessors.forEach(accessor => {
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Object.defineProperty(Class.prototype, accessor, {
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get() {
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return this.$$component?.[accessor];
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},
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})
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});
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return Class;
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}
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}
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/**
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/**
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Simon Holthausen
3 years ago