From 66878b1a79f2b8d4f5d875f7aa029ee579da1fc4 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Wed, 20 Feb 2019 18:22:22 +0200
Subject: [PATCH] Update and rename LimitedWordTextArea.md to
 LimitedWordTextarea.md

---
 snippets/LimitedWordTextArea.md | 62 ---------------------------------
 snippets/LimitedWordTextarea.md | 61 ++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 62 deletions(-)
 delete mode 100644 snippets/LimitedWordTextArea.md
 create mode 100644 snippets/LimitedWordTextarea.md

diff --git a/snippets/LimitedWordTextArea.md b/snippets/LimitedWordTextArea.md
deleted file mode 100644
index 662ec93dd..000000000
--- a/snippets/LimitedWordTextArea.md
+++ /dev/null
@@ -1,62 +0,0 @@
-### LimitedWordTextArea
-
-Renders a textarea component with a word limit.
-
-Use the value of the `value` prop to determine the initial `state.content` and `state.wordCount` and the value of the `limit` props to determine the value of `state.limit`.
-Create a method, `handleChange`, which trims the `event.target.value` data if necessary and uses `Component.prototype.setState` to update `state.content` and `state.wordCount`, and bind it to the component's context.
-In the`render()` method, use a`<div>` to wrap both the`<textarea>` and the `<p>` element that displays the character count and bind the `onChange` event of the `<textarea>` to the `handleChange` method.
-
-```jsx
-class LimitedWordTextArea extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = {
-      content: props.value,
-      wordCount: props.value.split(' ').filter(Boolean).length,
-      limit: props.limit
-    };
-    this.handleChange = this.handleChange.bind(this);
-  }
-
-  handleChange(event) {
-    let newContent = event.target.value;
-
-    if (newContent.split(' ').filter(Boolean).length > this.state.limit) {
-      newContent = newContent
-        .split(' ')
-        .splice(0, this.state.limit)
-        .join(' ');
-    }
-    this.setState(state => ({
-      content: newContent,
-      wordCount: newContent.split(' ').filter(Boolean).length
-    }));
-  }
-  render() {
-    return (
-      <div>
-        <textarea
-          rows={this.props.rows}
-          cols={this.props.cols}
-          onChange={this.handleChange}
-          value={this.state.content}
-        >
-        </textarea>
-        <p>{this.state.wordCount} / {this.props.limit}</p>
-      </div>
-    );
-  }
-}
-```
-
-```jsx
-ReactDOM.render(
-  <LimitedWordTextArea limit={5} value='Hello there!' />,
-  document.getElementById('root')
-);
-```
-
-< !--tags: input,state,class -- >
-
-< !--expertise: 0 -- >
-
diff --git a/snippets/LimitedWordTextarea.md b/snippets/LimitedWordTextarea.md
new file mode 100644
index 000000000..189b54ff1
--- /dev/null
+++ b/snippets/LimitedWordTextarea.md
@@ -0,0 +1,61 @@
+### LimitedWordTextarea
+
+Renders a textarea component with a word limit.
+
+Use the `React.useState()` hook to create the `content` and `wordCount` state variables and set their values to `value` and `0` respectively.
+Create a method `setFormattedContent`, which uses `String.prototype.split(' ')` to turn the input into an array of words and check if the result of applying `Array.prototype.filter(Boolean)` has a `length` longer than `limit`.
+If the afforementioned `length` exceeds the `limit`, trim the input, otherwise return the raw input, updating `content` and `wordCount` accordingly in both cases.
+Use the `React.useEffect()` hook to call the `setFormattedContent` method on the value of the `content` state variable.
+Use a`<div>` to wrap both the`<textarea>` and the `<p>` element that displays the character count and bind the `onChange` event of the `<textarea>` to call `setFormattedContent` with the value of `event.target.value`.
+
+```jsx
+function LimitedWordTextarea({ rows, cols, value, limit }) {
+  const [content, setContent] = React.useState(value);
+  const [wordCount, setWordCount] = React.useState(0);
+
+  const setFormattedContent = text => {
+    let words = text.split(" ");
+    if (words.filter(Boolean).length > limit) {
+      setContent(
+        text
+          .split(" ")
+          .slice(0, limit)
+          .join(" ")
+      );
+      setWordCount(limit);
+    } else {
+      setContent(text);
+      setWordCount(words.filter(Boolean).length);
+    }
+  };
+
+  React.useEffect(() => {
+    setFormattedContent(content);
+  }, []);
+
+  return (
+    <div>
+      <textarea
+        rows={rows}
+        cols={cols}
+        onChange={event => setFormattedContent(event.target.value)}
+        value={content}
+      />
+      <p>
+        {wordCount}/{limit}
+      </p>
+    </div>
+  );
+}
+```
+
+```jsx
+ReactDOM.render(
+  <LimitedWordTextArea limit={5} value='Hello there!' />,
+  document.getElementById('root')
+);
+```
+<!-- tags: input,state,effect -->
+
+<!-- expertise: 0 -->
+