How to precisely hide HTML elements by combining class names
This article explains how to use multi-class selectors without spaces in CSS (such as `.classA.classB.classC`) to accurately match elements with multiple classes at the same time, thereby displaying only specific combinations and hiding other elements containing subset class names.
In actual development, especially when dealing with third-party HTML, we often need to perform style control based on known and stable class combinations. For example, given the following structure:
<div class="classA classB classC">A_display</div> <div class="classB classC">B_no_display</div> <div class="classC">C_no_display</div>
The goal is to show only the first The key is to understand the difference between spaces and no spaces in CSS class selectors: Therefore, the correct way to write it is as follows: ⚠️ Notes: The final page will only render: The remaining elements are effectively hidden, achieving the desired effect.
/* Exactly match elements that contain classA, classB, and classC at the same time*/
.classA.classB.classC {
display: block; /* or inline / flex, etc., set as needed */
}
/* Hide elements containing only classB and classC (excluding classA) */
.classB.classC {
display: none;
}
/* Hide elements that only contain classC (to avoid omissions) */
.classC {
display: none;
}
<div class="classA classB classC">A_display</div>
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