Add maxLength counter in Growing Textarea (#95)

src/components/Views/Edit.tsx

@@ -144,6 +144,7 @@ export const EditView = (props: EditViewProps) => {
                       class={styles.titleInput}
                       placeholder={t('Header')}
                       initialValue={form.title}
+                      maxLength={100}
                     />
                     <Show when={formErrors.title}>
                       <div class={styles.validationError}>{formErrors.title}</div>
@@ -154,6 +155,7 @@ export const EditView = (props: EditViewProps) => {
                     class={styles.subtitleInput}
                     placeholder={t('Subheader')}
                     initialValue={form.subtitle}
+                    maxLength={100}
                   />
                   <Editor
                     shoutId={props.shout.id}

src/components/_shared/GrowingTextarea/GrowingTextarea.module.scss

@@ -1,6 +1,7 @@
 .GrowingTextarea {
   display: block;
   width: 100%;
+  position: relative;
 
   .growWrap {
     display: grid;
@@ -42,4 +43,34 @@
       padding: 0;
     }
   }
+
+  .maxLength {
+    opacity: 1;
+    position: absolute;
+    right: 0.6rem;
+    bottom: -1.2rem;
+    font-size: 1.1rem;
+    border: 3px solid rgba(#ccc, 0.5);
+    padding: 0.5rem;
+    border-radius: 1.3rem;
+    line-height: 1;
+    user-select: none;
+    transition: opacity 0.3s ease-in-out;
+    background: rgba(255, 255, 255, 0.8);
+
+    &.visible {
+      opacity: 1;
+    }
+
+    &.limited {
+      animation: blink 0.8s;
+      animation-iteration-count: 2;
+    }
+  }
+}
+
+@keyframes blink {
+  50% {
+    border-color: #000;
+  }
 }

src/components/_shared/GrowingTextarea/GrowingTextarea.tsx

@@ -1,16 +1,18 @@
 import { clsx } from 'clsx'
 import styles from './GrowingTextarea.module.scss'
-import { createSignal } from 'solid-js'
+import { createSignal, Show } from 'solid-js'
 
 type Props = {
   class?: string
   placeholder: string
   initialValue?: string
   value: (string) => void
+  maxLength?: number
 }
 
 export const GrowingTextarea = (props: Props) => {
   const [value, setValue] = createSignal('')
+  const [isFocused, setIsFocused] = createSignal(false)
   const handleChangeValue = (event) => {
     setValue(event.target.value)
     props.value(event.target.value)
@@ -31,14 +33,27 @@ export const GrowingTextarea = (props: Props) => {
       <div class={clsx(styles.growWrap, props.class)} data-replicated-value={value()}>
         <textarea
           rows={1}
+          maxlength={props.maxLength}
           autocomplete="off"
           class={clsx(styles.textInput, props.class)}
           value={props.initialValue}
           onKeyDown={handleKeyDown}
           onInput={(event) => handleChangeValue(event)}
           placeholder={props.placeholder}
+          onFocus={() => setIsFocused(true)}
+          onBlur={() => setIsFocused(false)}
         />
       </div>
+      <Show when={props.maxLength && value()}>
+        <div
+          class={clsx(styles.maxLength, {
+            [styles.visible]: isFocused(),
+            [styles.limited]: value().length === props.maxLength
+          })}
+        >
+          {`${value().length} / ${props.maxLength}`}
+        </div>
+      </Show>
     </div>
   )
 }