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I have this multi-dimensional array in JavaScript and i'm trying to populate a header in HTML with it i want to populate this header so that all the first name is printed out separately in the header. Is there an easy way to accomplish this cos i'm not sure how to go about it. Any help would be greatly appreciated.

What I have tried:

Here is my JSfiddle[^]
Updated 20-Jun-18 1:54am

1 solution

There are a few ways to approach this, but many of the "shortcuts" will have unintended secondary effects. The best way to do this cleanly is to create the elements that you want to populate and append them into the DOM at your point of interest. For example:

    <script type="text/javascript">
        let personArr = [
            {firstName:"John", lastName:"Doe", age:21},
            {firstName:"Paul", lastName:"Logan", age:22},
            {firstName:"Sean", lastName:"Kim", age:32},
            {firstName:"Ken", lastName:"Chow", age:12}

        let peopleDiv = document.getElementById('People');

        for(let i=0;i<personArr.length;i++){
            let newElement = document.createElement('h6');
            newElement.innerHTML = personArr[i].firstName;
<div id="People"></div>

if you need to do this with a multi-dimensional array you can make your DOM assignments from a nested loop.
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