Javascript Dom - Using Nodelists And Converting To An Array

so I will preface my question with letting you know that this is an assignment for school. I have been working to solve this and I have tried to find the solution within the MDN d

Solution 1:

You can iterate all the <li> items in each <ul> in the page like this while able to separately tell which <ul> they are in:

var list = document.getElementsByTagName("ul");
for (var i = 0; i < list.length; i++) {
    var items = list[i].getElementsByTagName("li");
    for (var j = 0; j < items.length; j++) {
        console.log(items[j]);
    }
}

Or, if you just want all <li> tags, not broken out by <ul>:

var items = document.getElementsByTagName("li");
for (var i = 0; i < items.length; i++) {
    console.log(items[i]);
}

A nodeList or HTMLCollection can be iterated with a simple for loop as seen above. These objects do not have array methods, but can be copied into an array if you really want to use array methods.

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Note, it is probably simpler to use document.querySelectorAll() for listing all the <li> elements and you may want to target a specific <ul> tag by putting an id on it in case there are other <ul> and <li> elements in the page.

<ul id="buglist">
    <li>Horse Flies</li><li>Bed bugs</li><li>Mosquito</li><li>Ants</li><li>Mites</li><li>Cricket</li><li>Woolly Bear Caterpillar</li><li>Fleas</li><li>Worms</li><li>Leeches</li>
</ul>

var items = document.querySelectorAll("#buglist li");
for (var j = 0; j < items.length; j++) {
    console.log(items[j]);
}

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A nodeList or HTMLCollection can be copied into an array like this:

var list = Array.prototype.slice.call(document.querySelectorAll("#buglist li"), 0);
list.forEach(function(item) {
    console.log(item);
});