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| 1 | +import * as React from "react"; |
| 2 | +import { createRoot } from "react-dom/client"; |
| 3 | +import { useForm } from "@tanstack/react-form"; |
| 4 | +import { valibotValidator } from "@tanstack/valibot-form-adapter"; |
| 5 | +import { string, minLength, stringAsync, PipeResult } from "valibot"; |
| 6 | +import type { FieldApi } from "@tanstack/react-form"; |
| 7 | + |
| 8 | +function FieldInfo({ field }: { field: FieldApi<any, any, unknown, unknown> }) { |
| 9 | + return ( |
| 10 | + <> |
| 11 | + {field.state.meta.touchedErrors ? ( |
| 12 | + <em>{field.state.meta.touchedErrors}</em> |
| 13 | + ) : null} |
| 14 | + {field.state.meta.isValidating ? "Validating..." : null} |
| 15 | + </> |
| 16 | + ); |
| 17 | +} |
| 18 | + |
| 19 | +export default function App() { |
| 20 | + const form = useForm({ |
| 21 | + defaultValues: { |
| 22 | + firstName: "", |
| 23 | + lastName: "", |
| 24 | + }, |
| 25 | + onSubmit: async (values) => { |
| 26 | + // Do something with form data |
| 27 | + console.log(values); |
| 28 | + }, |
| 29 | + // Add a validator to support Valibot usage in Form and Field |
| 30 | + validator: valibotValidator, |
| 31 | + }); |
| 32 | + |
| 33 | + return ( |
| 34 | + <div> |
| 35 | + <h1>Valibot Form Example</h1> |
| 36 | + <form.Provider> |
| 37 | + <form |
| 38 | + onSubmit={(e) => { |
| 39 | + e.preventDefault(); |
| 40 | + e.stopPropagation(); |
| 41 | + void form.handleSubmit(); |
| 42 | + }} |
| 43 | + > |
| 44 | + <div> |
| 45 | + {/* A type-safe field component*/} |
| 46 | + <form.Field |
| 47 | + name="firstName" |
| 48 | + onChange={string([ |
| 49 | + minLength(3, "First name must be at least 3 characters"), |
| 50 | + ])} |
| 51 | + onChangeAsyncDebounceMs={500} |
| 52 | + onChangeAsync={stringAsync([ |
| 53 | + async (value) => { |
| 54 | + await new Promise((resolve) => setTimeout(resolve, 1000)); |
| 55 | + return ( |
| 56 | + value.includes("error") |
| 57 | + ? { |
| 58 | + issues: [ |
| 59 | + { |
| 60 | + input: value, |
| 61 | + validation: "firstName", |
| 62 | + message: "No 'error' allowed in first name", |
| 63 | + }, |
| 64 | + ], |
| 65 | + } |
| 66 | + : { output: value } |
| 67 | + ) as PipeResult<string>; |
| 68 | + }, |
| 69 | + ])} |
| 70 | + children={(field) => { |
| 71 | + // Avoid hasty abstractions. Render props are great! |
| 72 | + return ( |
| 73 | + <> |
| 74 | + <label htmlFor={field.name}>First Name:</label> |
| 75 | + <input |
| 76 | + name={field.name} |
| 77 | + value={field.state.value} |
| 78 | + onBlur={field.handleBlur} |
| 79 | + onChange={(e) => field.handleChange(e.target.value)} |
| 80 | + /> |
| 81 | + <FieldInfo field={field} /> |
| 82 | + </> |
| 83 | + ); |
| 84 | + }} |
| 85 | + /> |
| 86 | + </div> |
| 87 | + <div> |
| 88 | + <form.Field |
| 89 | + name="lastName" |
| 90 | + children={(field) => ( |
| 91 | + <> |
| 92 | + <label htmlFor={field.name}>Last Name:</label> |
| 93 | + <input |
| 94 | + name={field.name} |
| 95 | + value={field.state.value} |
| 96 | + onBlur={field.handleBlur} |
| 97 | + onChange={(e) => field.handleChange(e.target.value)} |
| 98 | + /> |
| 99 | + <FieldInfo field={field} /> |
| 100 | + </> |
| 101 | + )} |
| 102 | + /> |
| 103 | + </div> |
| 104 | + <form.Subscribe |
| 105 | + selector={(state) => [state.canSubmit, state.isSubmitting]} |
| 106 | + children={([canSubmit, isSubmitting]) => ( |
| 107 | + <button type="submit" disabled={!canSubmit}> |
| 108 | + {isSubmitting ? "..." : "Submit"} |
| 109 | + </button> |
| 110 | + )} |
| 111 | + /> |
| 112 | + </form> |
| 113 | + </form.Provider> |
| 114 | + </div> |
| 115 | + ); |
| 116 | +} |
| 117 | + |
| 118 | +const rootElement = document.getElementById("root")!; |
| 119 | + |
| 120 | +createRoot(rootElement).render(<App />); |
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