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annotate design_system/src/components/field.js @ 266:efaf4c63cc94

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fix clean production bundle staging Recreate deployment staging before copying the Bazel bundle and verify required inference runtime paths before promoting it. Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Fri, 07 Aug 2026 12:52:30 -0700
parents 2b6e732087ff
children
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1 let nextFieldId = 1;
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2
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3 function uniqueId(base) {
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4 let candidate = base;
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5 let suffix = 2;
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6 while (document.getElementById(candidate)) {
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7 candidate = `${base}-${suffix++}`;
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8 }
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9 return candidate;
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10 }
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11
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12 /**
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13 * Associates a label, native form control, and descriptive help text.
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14 *
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15 * @extends {HTMLElement}
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16 */
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17 export class ZenField extends HTMLElement {
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18 connectedCallback() {
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19 if (!this._observer) {
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20 this._observer = new MutationObserver(() => this.sync());
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21 }
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22 this._observer.observe(this, {
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23 attributes: true,
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24 attributeFilter: ["id"],
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25 childList: true,
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26 subtree: true,
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27 });
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28 this.sync();
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29 }
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30
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31 disconnectedCallback() {
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32 this._observer?.disconnect();
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33 this.disconnectControl();
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34 }
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35
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36 disconnectControl() {
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37 if (!this._control || !this._updateValidity) return;
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38 this._control.removeEventListener("invalid", this._updateValidity);
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39 this._control.removeEventListener("input", this._updateValidity);
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40 this._control.removeEventListener("change", this._updateValidity);
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41 if (this._addedDescription) {
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42 const describedBy = (this._control.getAttribute("aria-describedby") || "")
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43 .split(/\s+/)
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44 .filter(value => value && value !== this._addedDescription);
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45 if (describedBy.length) {
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46 this._control.setAttribute(
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47 "aria-describedby",
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48 describedBy.join(" "),
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49 );
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50 } else {
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51 this._control.removeAttribute("aria-describedby");
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52 }
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53 }
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54 if (this._label) {
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55 if (this._originalLabelFor === null) {
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56 this._label.removeAttribute("for");
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57 } else {
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58 this._label.setAttribute("for", this._originalLabelFor);
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59 }
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60 }
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61 this._control = null;
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62 this._label = null;
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63 this._help = null;
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64 this._controlId = null;
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65 this._helpId = null;
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66 this._addedDescription = null;
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67 this._originalLabelFor = null;
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68 this._updateValidity = null;
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69 this.removeAttribute("data-invalid");
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70 }
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71
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72 sync() {
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73 const label = this.querySelector(":scope > label");
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74 const control = this.querySelector(
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75 ":scope > input, :scope > select, :scope > textarea",
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76 );
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77 if (!label || !control) {
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78 this.disconnectControl();
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79 return;
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80 }
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81 const help = this.querySelector(":scope > small, :scope > [data-help]");
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82 if (control === this._control &&
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83 label === this._label &&
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84 help === this._help &&
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85 control.id === this._controlId &&
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86 (help?.id || null) === this._helpId) return;
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87
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88 this.disconnectControl();
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89 this._control = control;
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90 this._label = label;
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91 this._help = help;
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92 if (!control.id) {
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93 control.id = uniqueId(`zen-field-${nextFieldId++}`);
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94 }
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95 this._originalLabelFor = label.getAttribute("for");
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96 label.htmlFor = control.id;
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97
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98 if (help) {
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99 if (!help.id) help.id = uniqueId(`${control.id}-help`);
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100 const describedBy = new Set(
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101 (control.getAttribute("aria-describedby") || "")
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102 .split(/\s+/)
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103 .filter(Boolean),
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104 );
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105 if (!describedBy.has(help.id)) {
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106 this._addedDescription = help.id;
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107 }
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108 describedBy.add(help.id);
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109 control.setAttribute(
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110 "aria-describedby",
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111 [...describedBy].join(" "),
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112 );
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113 }
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114 this._controlId = control.id;
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115 this._helpId = help?.id || null;
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116
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117 this._updateValidity = () => {
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118 this.toggleAttribute(
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119 "data-invalid",
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120 !control.validity.valid,
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121 );
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122 };
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123 control.addEventListener("invalid", this._updateValidity);
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124 control.addEventListener("input", this._updateValidity);
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125 control.addEventListener("change", this._updateValidity);
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126 }
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127 }
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128
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129 if (!customElements.get("zen-field")) {
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130 customElements.define("zen-field", ZenField);
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131 }