根据 contenteditable Div 中的插入符号位置获取选定元素

Question

我试图在可满足的 DIV 中的任何给定时间获取插入符号所在的元素。

到目前为止，我能够获得文本中的插入符号位置。

但我想更进一步以实际选择元素。例如，如果在我的示例中插入符号位于单词 "wombat" 的第一个字母之后，则解决方案还将 return 所选元素 "wombatid" 的 id 而不仅仅是插入位置。有任何提示或解决方案吗？

function getSelectionCharacterOffsetWithin(element) {
    var start = 0;
    var end = 0;
    var doc = element.ownerDocument || element.document;
    var win = doc.defaultView || doc.parentWindow;
    var sel;
    if (typeof win.getSelection != "undefined") {
        sel = win.getSelection();
        if (sel.rangeCount > 0) {
            var range = win.getSelection().getRangeAt(0);
            var preCaretRange = range.cloneRange();
            preCaretRange.selectNodeContents(element);
            preCaretRange.setEnd(range.startContainer, range.startOffset);
            start = preCaretRange.toString().length;
            preCaretRange.setEnd(range.endContainer, range.endOffset);
            end = preCaretRange.toString().length;
        }
    } else if ( (sel = doc.selection) && sel.type != "Control") {
        var textRange = sel.createRange();
        var preCaretTextRange = doc.body.createTextRange();
        preCaretTextRange.moveToElementText(element);
        preCaretTextRange.setEndPoint("EndToStart", textRange);
        start = preCaretTextRange.text.length;
        preCaretTextRange.setEndPoint("EndToEnd", textRange);
        end = preCaretTextRange.text.length;
    }
    return { start: start, end: end };
}

function reportSelection() {
  var selOffsets = getSelectionCharacterOffsetWithin( document.getElementById("editor") );
  document.getElementById("selectionLog").innerHTML = "Selection offsets: " + selOffsets.start + ", " + selOffsets.end+" <br> Selected Element's id: 'element here'";
}

window.onload = function() {
  document.addEventListener("selectionchange", reportSelection, false);
  document.addEventListener("mouseup", reportSelection, false);
  document.addEventListener("mousedown", reportSelection, false);
  document.addEventListener("keyup", reportSelection, false);
};

#editor {
  padding: 5px;
  border: solid green 1px;
}

Select something in the content below:

<div id="editor" contenteditable="true">A <i id="wombatid">wombat</i> is a marsupial native to <b id="australiaid">Australia</b></div>
<div id="selectionLog"></div>

Answer 1

要获取 ID，您可以尝试以下方法：

document.querySelectorAll("#editor *").forEach(el => el.onclick = e => alert(e.target.id));

此处 e.target 将是您的 HTML 元素，它应该适用于任何 HTML 元素

function getSelectionCharacterOffsetWithin(element) {
    var start = 0;
    var end = 0;
    var doc = element.ownerDocument || element.document;
    var win = doc.defaultView || doc.parentWindow;
    var sel;
    if (typeof win.getSelection != "undefined") {
        sel = win.getSelection();
        if (sel.rangeCount > 0) {
            var range = win.getSelection().getRangeAt(0);
            var preCaretRange = range.cloneRange();
            preCaretRange.selectNodeContents(element);
            preCaretRange.setEnd(range.startContainer, range.startOffset);
            start = preCaretRange.toString().length;
            preCaretRange.setEnd(range.endContainer, range.endOffset);
            end = preCaretRange.toString().length;
        }
    } else if ( (sel = doc.selection) && sel.type != "Control") {
        var textRange = sel.createRange();
        var preCaretTextRange = doc.body.createTextRange();
        preCaretTextRange.moveToElementText(element);
        preCaretTextRange.setEndPoint("EndToStart", textRange);
        start = preCaretTextRange.text.length;
        preCaretTextRange.setEndPoint("EndToEnd", textRange);
        end = preCaretTextRange.text.length;
    }
    return { start: start, end: end };
}

function reportSelection() {
  var selOffsets = getSelectionCharacterOffsetWithin( document.getElementById("editor") );
  document.getElementById("selectionLog").innerHTML = "Selection offsets: " + selOffsets.start + ", " + selOffsets.end+" <br> Selected Element's id: 'element here'";
}

window.onload = function() {
  document.addEventListener("selectionchange", reportSelection, false);
  document.addEventListener("mouseup", reportSelection, false);
  document.addEventListener("mousedown", reportSelection, false);
  document.addEventListener("keyup", reportSelection, false);
  document.querySelectorAll("#editor *").forEach(el => el.onclick = e => alert(e.target.id));
};

#editor {
  padding: 5px;
  border: solid green 1px;
}

Select something in the content below:

<div id="editor" contenteditable="true">A <i id="wombatid">wombat</i> is a marsupial native to <b id="australiaid">Australia</b></div>
<div id="selectionLog"></div>

根据 contenteditable Div 中的插入符号位置获取选定元素

Get Selected Element based on caret position in contenteditable Div

html

javascript

jquery

contenteditable