Generate HTML List From JavaScript Array

Generate an HTML ul/li list based on the contents of a JavaScript array or how to create a JavaScript list.

By modifying the makeList() function to accept parameters and target elements, you can pass different arrays and generate different lists inside different containers.

Solution 1

This vanilla JavaScript function has zero dependencies and works in all browsers.

function makeList() {
    // Establish the array which acts as a data source for the list
    let listData = [
        'Blue',
        'Red',
        'White',
        'Green',
        'Black',
        'Orange'
    ],
    // Make a container element for the list
    listContainer = document.createElement('div'),
    // Make the list
    listElement = document.createElement('ul'),
    // Set up a loop that goes through the items in listItems one at a time
    numberOfListItems = listData.length,
    listItem,
    i;

    // Add it to the page
    document.getElementsByTagName('body')[0].appendChild(listContainer);
    listContainer.appendChild(listElement);

    for (i = 0; i < numberOfListItems; ++i) {
        // create an item for each one
        listItem = document.createElement('li');

        // Add the item text
        listItem.innerHTML = listData[i];

        // Add listItem to the listElement
        listElement.appendChild(listItem);
    }
}

// Usage
makeList();

See a JSFiddle demo here.

Solution 2

This function is more compact and uses a forEach() loop:

let items = [
        'Blue',
        'Red',
        'White',
        'Green',
        'Black',
        'Orange'
    ],
    ul = document.createElement('ul');

document.getElementById('myItemList').appendChild(ul);

items.forEach(function (item) {
    let li = document.createElement('li');
    ul.appendChild(li);

    li.innerHTML += item;
});

Here’s another way of doing it, similar to the first solution. Note that the forEach() loop is marginally slower.
Check out this jsPerf test in a modern browser.

Find more JavaScript tutorials, code snippets and samples here or more jQuery tutorials, code snippets and samples here.

Added by Ciprian on Wednesday, January 10, 2018 in Blog, JavaScript

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