Is there a way to get innerText of only the top el

问题:

Is there a way to get innerText of only the top element (and ignore the child element's innerText) ?

Example:

<div> 
   top node text 
   <div> child node text </div>
</div>

How to get the "top node text" while ignoring "child node text" ? innerText property of top div seem to return concatenation of both inner , top text.

回答1:

Just iterate over the child nodes and concatenate text nodes:

var el = document.getElementById("your_element_id"),
    child = el.firstChild,
    texts = [];

while (child) {
    if (child.nodeType == 3) {
        texts.push(child.data);
    }
    child = child.nextSibling;
}

var text = texts.join("");

回答2:

1. Clone the element.
2. Loop through all child nodes (backwards, to avoid conflicts):
   If the element has a tagName attribute, then it's an element: Remove the node.
3. Use innerText to get the textual contents (with fallback to textContent, when innerText is not supported).

Code:

var elem = document.getElementById('theelement');
elem = elem.cloneNode(true);
for (var i=elem.childNodes.length-1; i>=0; i--) {
    if (elem.childNodes[i].tagName) elem.removeChild(elem.childNodes[i]);
}
var innerText = elem['innerText' in elem ? 'innerText' : 'textContent'];

回答3:

This will work in your example: document.getElementById("item").firstChild.nodeValue;

Note: Keep in mind that this will work if you know you are dealing with that specific HTML. If your HTML can change, for example to:

<div> 
    <div class="item"> child node text </div>
    top node text 
</div>

then you should use the more generic solution by @Tim Down

---

Here is working code snippet:

window.onload = function() {
   var text = document.getElementById("item").firstChild.nodeValue;
   document.getElementById("result").innerText = text.trim();
};

#result {
  border: 1px solid red;
}

<div id="item">
  top node text 
   <div> child node text </div>
</div>



<strong>Result:</strong> <div id="result"></div>

回答4:

If you don't want to ignore the child element's inner text, use the following function:

function getInnerText(el) {
    var x = [];
    var child = el.firstChild;
    while (child) {
        if (child.nodeType == 3) {
            x.push(child.nodeValue);
        }
        else if (child.nodeType == 1) {
            var ii = getInnerText(child);
            if (ii.length > 0) x.push(ii);
        }
        child = child.nextSibling;
    }
    return x.join(" ");
}

回答5:

function getDirectInnerText(element) {
  var childNodes = element.childNodes;
  result = '';

  for (var i = 0; i < childNodes.length; i++) {
    if(childNodes[i].nodeType == 3) {
      result += childNodes[i].data;
    }
  }

  return result;
}

element = document.querySelector("div#element");
console.log(getDirectInnerText(element))

<div id="element"> 
   top node text 
   <div> child node text </div>
</div>