javascript - 在文本更正时，触发事件。可能的？

Question

假设我有两个 textarea html 元素，我在一个中输入的内容显示在另一个中。

是否有一个 javascript 事件会在下面的屏幕截图中选择正确的单词时触发？

Answer 1

无法从事件中获取此信息。您可以编写自己的“逻辑”，通过检查 change 事件来检测任何单词更改。

使用 split() 和 filter() 函数检查更改后的单词的小示例:

function inputChange(event, oldvalue) {

    // Old words
    const old = oldvalue.split(' ');
    
    // Current words
    const curr = event.target.value.split(' ');
    
    // Changed words
    const diff = old.filter(x => !curr.includes(x));
    
    // For each changed word
    for (let changeId in diff) {
    
      // Diff
      console.log('Word changed: ', diff[changeId]);
      
      // Optionally, you can get the same index, so you'll know the new value
      const ind = old.indexOf(diff[changeId]);
      console.log('New value: ', curr[ind]);
    } 
}

input { width: 300px; }

<input type='textarea' value='Test txt. Correct this: hoube -> house' onfocus="this.oldvalue = this.value;" onchange="inputChange(event, oldvalue)" />

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