I tried using .addEventListener with querySelector, but for some reason it wouldn’t work.
JavaScript
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const b = document.querySelector(".buybttn");2
b.addEventListener("click",() => {3
console.log("button was clicked");4
})5
The error is Uncaught TypeError: Cannot read properties of null (reading 'addEventListener')
I don’t understand why the error is happening either.
JavaScript
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89
89
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<!DOCTYPE html>2
<html>3
<head>4
<link rel="stylesheet" href="style.css">5
6
<noscript><p>You need to enable javascript to fully use this website.</p></noscript>7
<meta charset="UTF-8">8
<meta http-equiv="X-UA-Compatible" content="IE=edge">9
<meta name="viewport" content="width=device-width, initial-scale=1.0">10
<title>Space Pups Fan Website!</title>11
</head>12
<body>13
14
<center>15
<div class="navbar">16
<a href="./plushie.html" class="buttonA">Plushies!</a>17
<a href="./about.html" class="buttonA">About Space Pups</button>18
<a class="buttonA" href="Hidden for privacy"> TikTok </a>19
</div>20
</center> 21
<h1> Space Pups</h1>22
<h2>Stickers</h2>23
<center>24
<div class="products">25
26
<div class="product">27
<center>28
<img src="./Images/sticker1.png"> 29
<h3>Gold Sticker!</h3>30
<h4>2.99$</h4>31
<button class="buybttn">Buy!</button>32
</center>33
</div> 34
<div class="product">35
<center>36
<img src="./Images/sticker2.png"> 37
<h3>Moth Alien Sticker!</h3>38
<h4>2.99$</h4>39
<button class="buybttn">Buy!</button>40
</center>41
</div> 42
<div class="product">43
<center>44
<img class="SpecialRose"src="./Images/sticker3.png"> 45
<h3>Rose Pup sticker!</h3>46
<h4>2.99$</h4>47
<button class="buybttn">Buy!</button>48
</center>49
</div>50
51
</div>52
<br>53
54
<div class="products">55
<div class="product">56
<center>57
<img class="SpecialBoss"src="./Images/sticker4.png"> 58
<h3>Alien Boss Sticker!</h3>59
<h4>2.99$</h4>60
<button class="buybttn">Buy!</button>61
</center>62
</div> 63
<div class="product">64
<center>65
66
<img class="SpecialDia" src="./Images/sticker5.png"> 67
<h3>Sleepy Dia Sticker!</h3>68
<h4>2.99$</h4>69
<button class="buybttn">Buy!</button>70
</center>71
</div> 72
<div class="product">73
<center>74
<img class="SpecialDia" src="./Images/sticker6.png"> 75
<h3>Ghost Pup Sticker!</h3>76
<h4>2.99$</h4>77
<button class="buybttn">Buy!</button>78
</center>79
</div> 80
81
</div>82
83
</center>84
85
</body>86
<script src="./script.js">87
</script>88
</html>89
Anyone have some knowledge they can share? …………………………………………………………. …………………………………………………………………………………………………………………….. Thanks, Leo.
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Answer
Just get all the buttons with document.querySelectorAll and add an event in each one of them with the forEach method and addEventListener. You can access the value of a button with event.target.value.
Try the following .js code:
JavaScript
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document.querySelectorAll(".buybttn").forEach(element => element.addEventListener('click', event => alert(`Button ${event.target.value} was clicked`)))2