Merge pull request wesbos#223 from bushbass/master

added lib/useForm.js to stepped solutions

stepped-solutions/23/useForm.js

@@ -0,0 +1,52 @@
+import { useEffect, useState } from 'react';
+
+export default function useForm(initial = {}) {
+  // create a state object for our inputs
+  const [inputs, setInputs] = useState(initial);
+  const initialValues = Object.values(initial).join('');
+
+  useEffect(() => {
+    // This function runs when the things we are watching change
+    setInputs(initial);
+  }, [initialValues]);
+
+  // {
+  //   name: 'wes',
+  //   description: 'nice shoes',
+  //   price: 1000
+  // }
+
+  function handleChange(e) {
+    let { value, name, type } = e.target;
+    if (type === 'number') {
+      value = parseInt(value);
+    }
+    if (type === 'file') {
+      [value] = e.target.files;
+    }
+    setInputs({
+      // copy the existing state
+      ...inputs,
+      [name]: value,
+    });
+  }
+
+  function resetForm() {
+    setInputs(initial);
+  }
+
+  function clearForm() {
+    const blankState = Object.fromEntries(
+      Object.entries(inputs).map(([key, value]) => [key, ''])
+    );
+    setInputs(blankState);
+  }
+
+  // return the things we want to surface from this custom hook
+  return {
+    inputs,
+    handleChange,
+    resetForm,
+    clearForm,
+  };
+}