1 |
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2 | import { Key, vnode, VNode, VNodeData } from "./vnode";
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3 | import { h, ArrayOrElement } from "./h";
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4 |
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5 |
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6 | namespace JSXInternal {
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7 | export type Element = VNode;
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8 | export interface IntrinsicElements {
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9 | [elemName: string]: VNodeData;
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10 | }
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11 | }
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12 |
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13 |
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14 | export type JsxVNodeChild =
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15 | | VNode
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16 | | string
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17 | | number
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18 | | boolean
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19 | | undefined
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20 | | null;
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21 | export type JsxVNodeChildren = ArrayOrElement<JsxVNodeChild>;
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22 |
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23 | export type FunctionComponent = (
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24 | props: { [prop: string]: any } | null,
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25 | children?: VNode[]
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26 | ) => VNode;
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27 |
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28 | export function Fragment(
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29 | data: { key?: Key } | null,
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30 | ...children: JsxVNodeChildren[]
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31 | ): VNode {
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32 | const flatChildren = flattenAndFilter(children, []);
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33 |
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34 | if (
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35 | flatChildren.length === 1 &&
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36 | !flatChildren[0].sel &&
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37 | flatChildren[0].text
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38 | ) {
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39 |
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40 | return vnode(
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41 | undefined,
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42 | undefined,
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43 | undefined,
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44 | flatChildren[0].text,
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45 | undefined
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46 | );
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47 | } else {
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48 | return vnode(undefined, data ?? {}, flatChildren, undefined, undefined);
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49 | }
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50 | }
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51 |
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52 | function flattenAndFilter(
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53 | children: JsxVNodeChildren[],
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54 | flattened: VNode[]
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55 | ): VNode[] {
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56 | for (const child of children) {
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57 |
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58 | if (
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59 | child !== undefined &&
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60 | child !== null &&
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61 | child !== false &&
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62 | child !== ""
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63 | ) {
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64 | if (Array.isArray(child)) {
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65 | flattenAndFilter(child, flattened);
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66 | } else if (
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67 | typeof child === "string" ||
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68 | typeof child === "number" ||
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69 | typeof child === "boolean"
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70 | ) {
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71 | flattened.push(
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72 | vnode(undefined, undefined, undefined, String(child), undefined)
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73 | );
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74 | } else {
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75 | flattened.push(child);
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76 | }
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77 | }
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78 | }
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79 | return flattened;
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80 | }
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81 |
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82 |
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83 |
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84 |
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85 |
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86 | export function jsx(
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87 | tag: string | FunctionComponent,
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88 | data: VNodeData | null,
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89 | ...children: JsxVNodeChildren[]
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90 | ): VNode {
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91 | const flatChildren = flattenAndFilter(children, []);
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92 | if (typeof tag === "function") {
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93 |
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94 | return tag(data, flatChildren);
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95 | } else {
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96 | if (
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97 | flatChildren.length === 1 &&
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98 | !flatChildren[0].sel &&
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99 | flatChildren[0].text
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100 | ) {
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101 |
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102 | return h(tag, data, flatChildren[0].text);
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103 | } else {
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104 | return h(tag, data, flatChildren);
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105 | }
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106 | }
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107 | }
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108 |
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109 | export namespace jsx {
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110 | export import JSX = JSXInternal;
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111 | }
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