feat(index.d.ts): added type definitions

fix tjinauyeung#81

Author: pixelmund

lib/index.d.ts

@@ -0,0 +1,104 @@
+import type {SvelteComponentTyped} from 'svelte';
+import type {Readable, Writable} from 'svelte/store';
+import type {ObjectSchema} from 'yup';
+
+/**
+ * Unfortunately svelte currently does not support generics in components so we export it to use it in scripts like this
+ *
+ * const formProps: FormProps = {
+ *  intitialValues: {...},
+ *  onSubmit: values => {...} -> values will be inffered from initialValues
+ * }
+ *
+ * */
+export type FormProps<Inf = Record<string, unknown>> = {
+  class?: string;
+  initialValues: Inf;
+  onSubmit: ((values: Inf) => any) | ((values: Inf) => Promise<any>);
+  validate?: (values: Inf) => any | undefined;
+  validationSchema?: ObjectSchema<any>;
+};
+
+type FieldProps = {
+  name: string;
+  type?: string;
+  value?: string;
+};
+
+type SelectProps = {
+  name: string;
+  class?: string;
+  value?: string;
+};
+
+type ErrorProps = {
+  name: string;
+  class?: string;
+};
+
+type TextareaProps = {
+  name: string;
+  class?: string;
+  cols?: number;
+  rows?: number;
+};
+
+declare function createForm<Inf = Record<string, unknown>>(formProps: {
+  initialValues: Inf;
+  onSubmit: (values: Inf) => any | Promise<any>;
+  validate?: (values: Inf) => any | undefined;
+  validationSchema?: ObjectSchema<any>;
+}): {
+  form: Writable<Inf>;
+  errors: Writable<Record<keyof Inf, string>>;
+  touched: Writable<Record<keyof Inf, boolean>>;
+  modified: Readable<Record<keyof Inf, boolean>>;
+  isValid: Readable<boolean>;
+  isSubmitting: Writable<boolean>;
+  isValidating: Writable<boolean>;
+  isModified: Readable<boolean>;
+  updateField: (field: keyof Inf, value: any) => void;
+  updateValidateField: (field: keyof Inf, value: any) => void;
+  updateTouched: (field: keyof Inf, value: any) => void;
+  validateField: (field: keyof Inf) => Promise<any>;
+  updateInitialValues: (newValues: Inf) => void;
+  handleReset: () => void;
+  state: Readable<{
+    form: Inf;
+    errors: Record<keyof Inf, string>;
+    touched: Record<keyof Inf, boolean>;
+    modified: Record<keyof Inf, boolean>;
+    isValid: boolean;
+    isSubmitting: boolean;
+    isValidating: boolean;
+    isModified: boolean;
+  }>;
+  handleChange: () => void;
+  handleSubmit: () => any;
+};
+
+declare class Form extends SvelteComponentTyped<
+  FormProps & {
+    class?: string;
+  },
+  {},
+  {default: any}
+> {}
+
+declare class Field extends SvelteComponentTyped<FieldProps, {}, {}> {}
+
+declare class Textarea extends SvelteComponentTyped<TextareaProps, {}, {}> {}
+
+declare class Select extends SvelteComponentTyped<
+  SelectProps,
+  {},
+  {default: any}
+> {}
+
+declare class ErrorMessage extends SvelteComponentTyped<
+  ErrorProps,
+  {},
+  {default: any}
+> {}
+
+export {createForm, Form, Field, Select, ErrorMessage, Textarea};

package.json

@@ -2,6 +2,7 @@
   "name": "svelte-forms-lib",
   "version": "0.0.0-semantically-released",
   "description": "Svelte forms lib - A lightweight library for managing forms in Svelte v3",
+  "typings": "./lib/index.d.ts",
   "scripts": {
     "start": "rollup -c -w rollup.config.js",
     "build": "cross-env NODE_ENV=production && rollup -c rollup.config.js",