我有一个contenteditable div,如下面的HTML所示(插入符号为capture { puts 'xyz' }
=> 'xyz\n'
)。
我想在按退格或删除时删除|
(即跨度充当单个字母,因此对用户而言,它看起来好像span.label
已在一个按键中被删除)
Name
答案 0 :(得分:10)
您需要检查光标是否位于跨度结束的确切位置,如果是,请将其删除:
document.querySelector('div').addEventListener('keydown', function(event) {
// Check for a backspace
if (event.which == 8) {
s = window.getSelection();
r = s.getRangeAt(0)
el = r.startContainer.parentElement
// Check if the current element is the .label
if (el.classList.contains('label')) {
// Check if we are exactly at the end of the .label element
if (r.startOffset == r.endOffset && r.endOffset == el.textContent.length) {
// prevent the default delete behavior
event.preventDefault();
if (el.classList.contains('highlight')) {
// remove the element
el.remove();
} else {
el.classList.add('highlight');
}
return;
}
}
}
event.target.querySelectorAll('span.label.highlight').forEach(function(el) { el.classList.remove('highlight');})
});

span.label.highlight {
background: #E1ECF4;
border: 1px dotted #39739d;
}

<div contenteditable="true">
Hallo, <span class="label">Name</span>|,
this is a demonstration of placeholders!
</div>
&#13;
我没有实现
del
密钥功能,但总体思路就在那里,我认为你可以根据上面的例子来完成它
答案 1 :(得分:0)
您可以在div上听取onKeyDown事件:
<div contenteditable="true" id="editable">
Hallo, <span class="label">Name</span>|,
this is a demonstration of placeholders!
</div>
这是事件监听处理程序:
document.addEventListener('keydown', function (e) {
var keycode = event.keyCode;
console.log(keycode);
if (keycode === 8 || keycode === 46) {
var spnLables = document.querySelectorAll('#editable span.label');
if (spnLables.length) {
Array.prototype.forEach.call(spnLables, function (thisnode) {
document.getElementById('editable').removeChild(thisnode);
});
}
}
});