I would greatly appreciate any assistance with clarifying or correcting this information

Looking to create a JavaScript function for a button that will hide certain ID elements and show others simultaneously. I've come up with a code snippet, but it's not working as expected. Given my limited experience with JavaScript, it's highly likely that there are errors in my code.

function mlbShowTeamsMap() {
  document.getElementById("mlbTeamsMap").style.display = "block";
  document.getElementById("mlbTeamsList").style.display = "block";
  var mlbOther = ["nflTeamsList", "nflTeamsMap", "nhlTeamsList", "nhlTeamsMap", "nbaTeamsList", "nbaTeamsMap"];
  mlbOther.forEach(hide);

  function hide() {
    style.display = "none";
  }
}
javascriptarraysfunction

Answer №1

Utilizing the forEach method to loop through the array mlbOther requires a callback function that takes the array element as a parameter. In your case, the callback function hide should include a variable to accept this parameter. See the revised code below.

Updated Syntax

function mlbShowTeamsMap() {
  document.getElementById("mlbTeamsMap").style.display = "block";
  document.getElementById("mlbTeamsList").style.display = "block";

  var mlbOther = ["nflTeamsList", "nflTeamsMap", "nhlTeamsList", "nhlTeamsMap", "nbaTeamsList", "nbaTeamsMap"];

  mlbOther.forEach(hide);

  function hide(id) {
    document.getElementById(id).style.display = "none";
  }

}

Alternative Syntax using arrow function

function mlbShowTeamsMap() {
  document.getElementById("mlbTeamsMap").style.display = "block";
  document.getElementById("mlbTeamsList").style.display = "block";

  var mlbOther = ["nflTeamsList", "nflTeamsMap", "nhlTeamsList", "nhlTeamsMap", "nbaTeamsList", "nbaTeamsMap"];

  mlbOther.forEach(id => {
    document.getElementById(id).style.display = "none";
  });
}

Learn More

forEach Method

Arrow Functions

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