let category = "design" //This place is changing, like art, design, photo let filtered = data.filter((item) => category === item.category_name)`
category contains a string. item.category_name is an array.
What I want to do is a filtering event. but an item can have multiple categories.
For example, the category of the 3rd item is as follows :
"category_name" : [ "design", "art" ],
How can I get the 3rd item to be selected when the category variable is art or design?
how can i compare array with a string
You can use the include method, it works for strings and arrays.
let filtered = data.filter((item) => item.category_name.includes(category))
["design", "art"].includes("design") will both return true
However, it would be best if you turned item.categoryName into an array, for consistency. Items with one category could have an array with only one item.