I can traverse to reach my target element like this:
this.parentElement.parentElement.style.backgroundColor = 'red';
But why does this not work even though I know for a fact that the second parentElement has the .container class:
this.parentElement.parentElement.querySelector('.container').style.backgroundColor = 'red';
Shouldn’t .querySelector start the search from the current element?
Example code:
document.querySelectorAll('button').forEach(btn => {
btn.addEventListener('click', function(){
//works:
//this.parentElement.parentElement.style.backgroundColor = 'red';
//error Cannot read properties of null:
this.parentElement.parentElement.querySelector('.container').style.backgroundColor = 'red';
})
});<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body{
display: flex;
flex-direction: row;
}
.container{
width: 25vw;
border-radius: 1rem;
background-color: bisque;
padding: 1rem;
margin: 1rem;
}
</style>
</head>
<body>
<div class="container">
<h2>Element</h2>
<div class="description">
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quam magnam delectus a animi fugit, odio veritatis maxime nihil totam earum, voluptates facere dolores facilis exercitationem? Hic repudiandae optio totam doloribus.</p>
<button>Color</button>
</div>
</div>
<div class="container">
<h2>Element</h2>
<div class="description">
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quam magnam delectus a animi fugit, odio veritatis maxime nihil totam earum, voluptates facere dolores facilis exercitationem? Hic repudiandae optio totam doloribus.</p>
<button>Color</button>
</div>
</div>
<div class="container">
<h2>Element</h2>
<div class="description">
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quam magnam delectus a animi fugit, odio veritatis maxime nihil totam earum, voluptates facere dolores facilis exercitationem? Hic repudiandae optio totam doloribus.</p>
<button>Color</button>
</div>
</div>
</body>
</html>>Solution :
No. from docs:
The querySelector() method of the Element interface returns the first element that is a descendant of the element on which it is invoked that matches the specified group of selectors.