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annotate design_system/src/components/button.js @ 272:41a49c29a28f

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polish JRPG conversation experience Integrate desktop conversations into the utility panel, simplify the mobile frame, add modal destinations and a reusable Zenbu composer lab, and preserve explicit conversation resume behavior. Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Fri, 07 Aug 2026 16:05:29 -0700
parents 2b6e732087ff
children
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1 /**
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2 * Enhances a native button or link with disabled and loading states.
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3 *
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4 * @extends {HTMLElement}
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5 */
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6 export class ZenButton extends HTMLElement {
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7 static get observedAttributes() {
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8 return ["disabled", "loading"];
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9 }
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10
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11 connectedCallback() {
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12 if (!this._blockInteraction) {
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13 this._blockInteraction = event => {
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14 if (!this.hasAttribute("disabled") &&
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15 !this.hasAttribute("loading")) return;
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16 event.preventDefault();
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17 event.stopImmediatePropagation();
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18 };
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19 }
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20 this.addEventListener("click", this._blockInteraction, true);
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21 if (!this._observer) {
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22 this._observer = new MutationObserver(records => {
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23 for (const record of records) {
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24 for (const node of record.removedNodes) {
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25 if (node instanceof Element &&
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26 node.matches("button, a")) {
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27 this.restoreManagedState(node);
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28 }
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29 }
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30 }
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31 this.sync();
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32 });
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33 }
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34 this._observer.observe(this, { childList: true });
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35 this.sync();
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36 }
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37
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38 disconnectedCallback() {
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39 this._observer?.disconnect();
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40 this.removeEventListener("click", this._blockInteraction, true);
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41 }
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42
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43 attributeChangedCallback() {
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44 this.sync();
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45 }
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46
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47 sync() {
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48 const control = this.querySelector(":scope > button, :scope > a");
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49 if (!control) return;
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50
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51 const disabled =
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52 this.hasAttribute("disabled") ||
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53 this.hasAttribute("loading");
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54
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55 if (disabled) {
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56 if (control.dataset.zenManagedAriaDisabled !== "true") {
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57 control.dataset.zenOriginalAriaDisabled =
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58 control.getAttribute("aria-disabled") ?? "__zen_missing__";
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59 control.dataset.zenManagedAriaDisabled = "true";
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60 }
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61 control.setAttribute("aria-disabled", "true");
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62 } else {
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63 this.restoreDisabledState(control);
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64 }
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65
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66 if (this.hasAttribute("loading")) {
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67 if (control.dataset.zenManagedAriaBusy !== "true") {
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68 control.dataset.zenOriginalAriaBusy =
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69 control.getAttribute("aria-busy") ?? "__zen_missing__";
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70 control.dataset.zenManagedAriaBusy = "true";
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71 }
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72 control.setAttribute("aria-busy", "true");
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73 } else if (control.dataset.zenManagedAriaBusy === "true") {
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74 if (control.dataset.zenOriginalAriaBusy === "__zen_missing__") {
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75 control.removeAttribute("aria-busy");
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76 } else {
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77 control.setAttribute(
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78 "aria-busy",
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79 control.dataset.zenOriginalAriaBusy,
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80 );
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81 }
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82 delete control.dataset.zenManagedAriaBusy;
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83 delete control.dataset.zenOriginalAriaBusy;
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84 }
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85 }
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86
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87 restoreDisabledState(control) {
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88 if (control.dataset.zenManagedAriaDisabled === "true") {
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89 if (control.dataset.zenOriginalAriaDisabled === "__zen_missing__") {
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90 control.removeAttribute("aria-disabled");
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91 } else {
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92 control.setAttribute(
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93 "aria-disabled",
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94 control.dataset.zenOriginalAriaDisabled,
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95 );
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96 }
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97 delete control.dataset.zenManagedAriaDisabled;
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98 delete control.dataset.zenOriginalAriaDisabled;
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99 }
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100 }
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101
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102 restoreManagedState(control) {
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103 this.restoreDisabledState(control);
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104 if (control.dataset.zenManagedAriaBusy === "true") {
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105 if (control.dataset.zenOriginalAriaBusy === "__zen_missing__") {
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106 control.removeAttribute("aria-busy");
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107 } else {
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108 control.setAttribute(
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109 "aria-busy",
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110 control.dataset.zenOriginalAriaBusy,
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111 );
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112 }
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113 delete control.dataset.zenManagedAriaBusy;
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114 delete control.dataset.zenOriginalAriaBusy;
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115 }
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116 }
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117 }
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118
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119 if (!customElements.get("zen-button")) {
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120 customElements.define("zen-button", ZenButton);
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121 }