如何通过 .filter() .filter()？ JavaScript

Question

I'm trying to dynamically compare a searchTag field against an array student.tags , for every student which themselves all live in another array called students

So something like below

students = [
  0: {
    name: "Cheddar",
    ...,
    tags: ["gravy","steak"]
  },

  ...,

  40: {
    name: "Stacy",
    ...,
    tags: ["gravy","grade"]
  },

]

I'm failing bad with a filter inside a filter, and struggling returning the students who have that tag in their tag array

I can do

students.filter((student) => {
            if ((student.tags.includes(searchTag))) {
              return student;
            } return '';
          })

but this returns only on exact match and I need to find students dynamically, ie typing 'gra' returns both student 0 and 40, but 'grad' returns only 40

Answer 1

You can use a combination of filter and some to filter the array

 const students = [ { name: "Cheddar", tags: ["gravy", "steak"], }, { name: "Stacy", tags: ["gravy", "grade"], }, ]; let search = "gra"; const result = students.filter(({ tags }) => tags.some((tag) => tag.toLowerCase().includes(search.toLowerCase()))); console.log(result);