indexOf is not a function on an array in jQuery grep

Question

Here's my function

function search(){
  var searchValue = $('#search-bar').val();

  console.log(Array.isArray(initData[0].body)); //true

  returnArr = $.grep(initData[0].body, function( element, idx ) {
      return element.indexOf(searchValue) != -1; // error: indexOf is not a function
  });

}

I'm getting indexOf is not a function.

I know initData[0].body is an array (see code)

Answer 1

You are calling indexOf on the element variable which is an item inside your initData[0].body array. Make sure element is an array type if you are calling indexOf on it.