我正在学习JavaScript,并且在尝试获取textareaElement的HTML值时遇到问题。在线上有很多东西,并且由于所有可用信息,这使其更加混乱。我了解DOM背后的想法,但不确定如何执行代码。我还尝试使用添加事件侦听器将数据存储在本地存储中,但是没有任何运气。
// Add a text entry to the page
function addTextEntry(key, text, isNewEntry) {
// Create a textarea element to edit the entry
var textareaElement = document.createElement("TEXTAREA");
textareaElement.rows = 5;
textareaElement.placeholder = "(new entry)";
// Set the textarea's value to the given text (if any)
textareaElement.value = text;
// Add a section to the page containing the textarea
addSection(key, textareaElement);
// If this is a new entry (added by the user clicking a button)
// move the focus to the textarea to encourage typing
if (isNewEntry) {
textareaElement.focus();
// Get HTML input values
var data = textareaElement.value;
}
// ...get the textarea element's current value
var data = textareaElement.value;
// ...make a text item using the value
var item = makeItem("text", data);
// ...store the item in local storage using key
localStorage.setItem(key, item);
// Connect the event listener to the textarea element:
textareaElement.addEventListener('onblur', addTextEntry);
}
HTML是:
<section id="text" class="button">
<button type="button">Add entry</button>
</section>
<section id="image" class="button">
<button type="button">Add photo</button>
<input type="file" accept="image/*" />
</section>
[HTML] [1]
答案 0 :(得分:2)
“ textareaElements”不是复数形式,
var data = textareaElements.value;
这是正确的形式:
var data = textareaElement.value;