diff --git a/README.md b/README.md index 80d2418..6ad6083 100644 --- a/README.md +++ b/README.md @@ -126,6 +126,437 @@ The schema produced by `fg.form()` has two methods: - `.parse()` that returns the parsed form data or throws an error if the form data is invalid. - `.safeParse()` that returns an object with this shape: `{ success: true, data: Output } | { success: false, error: Error }`. +## Complete API + +

interface FormInput

 + +Base interface for all form inputs. + +```ts +interface FormInput { + /** Attributes given when creating the validator. */ + attributes: Record; + /** + * Transforms the output of the validator into another value. + * + * @example + * text().transform((value) => value.length); + * + * @param fn - The transformation function. + * @param catcher - In case the transformation function throws, this function + * is called to generate an error message. + */ + transform(fn: (value: T) => U, catcher?: (error: unknown) => string): FormInput; + /** Adds a custom validation to the input. */ + refine(fn: (value: T) => value is U, message?: string | ((value: T) => string)): FormInput; + refine(fn: (value: T) => unknown, message?: string | ((value: T) => string)): FormInput; + /** + * Makes the field optional, for inputs that may be removed or added + * dynamically to the form. + * + * It returns `undefined` instead of `null` to differentiate between a missing + * field (`undefined`) and a field with an empty value (`null`). + * + * You may provide a default value to be used when the field is missing. + */ + optional(): FormInput; + optional(value: U): FormInput; + /** @private @internal */ + [safeParse]: (data: ReadonlyFormData, name: string) => Result; +} +``` + +
+ +

class FormgatorError

 + +An error thrown when using `form.parse()`. It has two fields: `issues` and `accepted`, +containing the issues and accepted values respectively. + +Type-safety cannot be guaranteed when using exceptions. If you want type-safety, use +`form.safeParse()`. + +
+ +

type Issues

 + +Transforms an object of form inputs into the issues object. + +```ts +type Issues = Record>> = { + [K in keyof T]?: ValidationIssue; +} extends infer O ? { + [K in keyof O]: O[K]; +} : never; +``` + +
+ +

type Output

 + +Transforms an object of form inputs into the success object. + +```ts +type Output = Record>> = { + [K in keyof T]: T[K] extends FormInput ? U : never; +} extends infer O ? { + [K in keyof O]: O[K]; +} : never; +``` + +
+ +

type ValidationIssue

 + +All possible validation issues that can be returned by a form input. + +```ts +type ValidationIssue = { + code: "accept"; + message: string; +} | { + code: "custom"; + message: string; +} | { + code: "invalid"; + message: string; +} | { + code: "max"; + max: number | string; + message: string; +} | { + code: "maxlength"; + maxlength: number; + message: string; +} | { + code: "min"; + min: number | string; + message: string; +} | { + code: "minlength"; + minlength: number; + message: string; +} | { + code: "pattern"; + pattern: RegExp; + message: string; +} | { + code: "refine"; + received: unknown; + message: string; +} | { + code: "required"; + message: string; +} | { + code: "step"; + step: number; + message: string; +} | { + code: "transform"; + message: string; +} | { + code: "type"; + message: string; +}; +``` + +
+ +

function checkbox()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. + +The `value` attribute is not supported, use `select({ multiple: true })` +instead if you want to handle several checkboxes with the same name but +different values. + +
+ +

function color()

 + +`` form input validator. + +It does not support any attributes. + +The output value is a string with the format `#rrggbb`. + +
+ +

function custom()

 + +A custom validator, transformer, whatever, for you to implement if formgator falls short on +features. + +Returning a value will be considered a success, while throwing an error will be considered a +validation issue. The error message will be used as the issue message. + +
+ +

function date()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. +- `min` - Minimum date. +- `max` - Maximum date. + +The output value is a string with the format `yyyy-mm-dd`. + +
+ +

function datetimeLocal()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. +- `min` - Minimum date. +- `max` - Maximum date. + +The output value is a string with the format `yyyy-mm-ddThh:mm`. + +
+ +

function email()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. +- `maxlength` - Maximum length of the input. +- `minlength` - Minimum length of the input. +- `pattern` - Regular expression pattern to match by each email address. +- `multiple` - Whether the input allows multiple comma-separated email + addresses. + +
+ +

function file()

 + +`` form input validator. + +Supported attributes: + +- `multiple` - Whether the input allows multiple files. +- `required` - Whether the input is required. +- `accept` - The accepted file types, as an array of MIME types (`image/png`), + MIME wildcards (`image/*`), or file extensions (`.png`). + +
+ +

function form()

 + +Creates a form validator from a record of form inputs. + +The return schema has two methods: `parse` and `safeParse`: +- `parse(data: FormData)` returns the data object if valid, throws a `FormgatorError` otherwise. +- `safeParse(data: FormData)` returns an object with `success` a success boolean flag, and + either `data` or `error` containing the parsed data or the issues respectively. + +
+ +

function hidden()

 + +`` form input validator. + +Not very useful, but included for completeness. + +
+ +

function image()

 + +`` form input validator. + +
+ +

function month()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. +- `min` - Minimum date. +- `max` - Maximum date. + +The output value is a string with the format `yyyy-mm-dd`. + +
+ +

function number()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. +- `min` - Minimum value. +- `max` - Maximum value. + +
+ +

function password()

 + +`` form input validator. + +Does not accept new lines, use `textarea()` instead. + +Supported attributes: + +- `required` - Whether the input is required. +- `maxlength` - Maximum length of the input. +- `minlength` - Minimum length of the input. +- `pattern` - Regular expression pattern to match. + +
+ +

function radio()

 + +`` form input validator. + +Supported attributes: + +- `required` - Whether the input is required. + +
+ +

function range()

 + +`` form input validator. + +Supported attributes: + +- `min` - Minimum value, defaults to `0`. +- `max` - Maximum value, defaults to `100`. +- `step` - Step value, defaults to `1`. + +
+ +

function search()

 + +`` form input validator. + +Does not accept new lines, use `textarea()` instead. + +Supported attributes: + +- `required` - Whether the input is required. +- `maxlength` - Maximum length of the input. +- `minlength` - Minimum length of the input. +- `pattern` - Regular expression pattern to match. + +
+ +

function select()

 + +`` form input validator. + +Does not accept new lines, use `textarea()` instead. + +Supported attributes: + +- `required` - Whether the input is required. +- `maxlength` - Maximum length of the input. +- `minlength` - Minimum length of the input. +- `pattern` - Regular expression pattern to match. + +
+ +

function text()

 + +`` form input validator. + +Does not accept new lines, use `textarea()` instead. + +Supported attributes: + +- `required` - Whether the input is required. +- `maxlength` - Maximum length of the input. +- `minlength` - Minimum length of the input. +- `pattern` - Regular expression pattern to match. + +
+ +

function textarea()

 + +`