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annotate design_system/src/components/alert.js @ 253:fdf3816959cb

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[ui] Add Sonner-like notification stack Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Tue, 04 Aug 2026 12:21:19 -0700
parents 117c4d53c9a4
children 2b6e732087ff
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1 export class ZenAlert extends HTMLElement {
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2 static get observedAttributes() {
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3 return ["dismissible", "tone"];
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4 }
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5
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6 connectedCallback() {
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7 if (!this._observer) {
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8 this._observer = new MutationObserver(() => this.sync());
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9 }
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10 this._observer.observe(this, { childList: true });
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11 this.sync();
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12 }
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13
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14 disconnectedCallback() {
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15 this._observer?.disconnect();
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16 this.unbindDismissControl();
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17 }
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18
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19 attributeChangedCallback() {
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20 this.sync();
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21 }
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22
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23 unbindDismissControl() {
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24 if (this._dismissControl && this._dismissHandler) {
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25 this._dismissControl.removeEventListener(
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26 "click",
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27 this._dismissHandler,
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28 );
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29 }
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30 this._dismissControl = null;
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31 this._dismissHandler = null;
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32 }
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33
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34 sync() {
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35 this.setAttribute(
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36 "role",
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37 this.getAttribute("tone") === "danger" ? "alert" : "status",
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38 );
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39
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40 let dismiss = this.querySelector(":scope > [data-zen-dismiss]");
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41 if (!this.hasAttribute("dismissible")) {
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42 this.unbindDismissControl();
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43 if (dismiss?.dataset.zenGenerated === "true") dismiss.remove();
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44 return;
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45 }
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46
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47 if (!dismiss) {
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48 dismiss = document.createElement("button");
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49 dismiss.type = "button";
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50 dismiss.dataset.zenDismiss = "";
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51 dismiss.dataset.zenGenerated = "true";
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52 dismiss.setAttribute("aria-label", "Dismiss message");
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53 dismiss.textContent = "×";
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54 this.append(dismiss);
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55 }
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56 if (dismiss === this._dismissControl) return;
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57
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58 this.unbindDismissControl();
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59 this._dismissControl = dismiss;
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60 this._dismissHandler = () => {
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61 this.dispatchEvent(new CustomEvent("zen-dismiss", {
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62 bubbles: true,
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63 composed: true,
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64 }));
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65 this.remove();
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66 };
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67 dismiss.addEventListener("click", this._dismissHandler);
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68 }
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69 }
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70
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71 if (!customElements.get("zen-alert")) {
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72 customElements.define("zen-alert", ZenAlert);
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73 }