Get text of nested childnodes javascript

Question

Although I have read many posts on this subject, I am unable to get the desired result.
My goal is to get text of nested childnodes in pure JavaScript. with this code

function GetChildNodes () {
    var container = document.getElementById ("find");
    for (var i = 0; i < container.childNodes.length; i++) {
        var child = container.childNodes[i];
        if (child.nodeType == 3) {
           var str=child.nodeValue
           console.log(str)
        }
        else {
            if (child.nodeType == 1) {
                var str=child.childNodes[0].nodeValue
                console.log(str)                        
            }
        }
    }
}

GetChildNodes()

I can get the text if html is

<div id="find">
    aaa
    <div>aaa</div>
    <div>aaa</div>
    <div>aaa</div>
    <div>aaa</div>
</div>

But with html code like this

<div id="find">
    aaa
    <div>aaa<div>bbb</div></div>
    <div>aaa<div>bbb</div></div>
    <div>aaa</div>
    <div>aaa</div>
</div>

...is wrong.
Could you please give me a solution?

Answer 1

If you don't need to get the text node-by-node you can get all of it from the ancestor with node.textContent,

var str = document.getElementById('find').textContent;
console.log(str);

Otherwise, you'll need to iterate or recurse through the DOM tree looking for nodeType 3 and accessing .data or .childNodes otherwise, e.g. recursing

function getText(node) {
    function recursor(n) {
        var i, a = [];
        if (n.nodeType !== 3) {
            if (n.childNodes)
                 for (i = 0; i < n.childNodes.length; ++i)
                     a = a.concat(recursor(n.childNodes[i]));
        } else
            a.push(n.data);
        return a;
    }
    return recursor(node);
}
// then
console.log(getText(document.getElementById('find')));

Answer 2

Since my purpose was also to change the text in nested elements if the text is equal to a string,
thanks to the advice of Paul S I could solve my problem this way

<script type="text/javascript">
function GetChildNodes (container) {
    function recursor(container){
            for (var i = 0; i < container.childNodes.length; i++) {
                var child = container.childNodes[i];
                if(child.nodeType !== 3&&child.childNodes){
                    recursor(child);
                }else{
                    var str=child.nodeValue;
                    if(str.indexOf('bbb')>-1){child.nodeValue='some other text'};
                    };
             };
    };
    recursor(container);
};
var container = document.getElementById ("find");
GetChildNodes(container);
</script>

Thanks again Paul !