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JavaScript Local Storage Project

Posted by sanjeshwari Nand
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sanjeshwari Nand
Full Stack JavaScript Techdegree Student 4,673 Points

Why is it necessary to return true?

function saveSearchString(str) {
      var searches = getRecentSearches();
      if(!str || searches.indexOf(str) > -1) {
        return false;
      }
      searches.push(str);
      localStorage.setItem('recentSearches', JSON.stringify(searches));
      return true;
    }

Mod Edit: Fixed code formatting for readability. You can post fancy code like this using markdown.

1 Answer

Brandon White
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Brandon White
Full Stack JavaScript Techdegree Graduate 34,662 Points
Brandon White
.a{fill-rule:evenodd;}techdegree seal-36
Brandon White
Full Stack JavaScript Techdegree Graduate 34,662 Points

Hi Sanjeshwari,

The reason you need to return true or false is because of the event listener added to the searchform variable. Within the callback function for that event listener, the saveSearchString function is invoked. But it’s invoked within an if statement. If the saveSearchString function returns false, then the code within the corresponding if block won’t run, but if the saveSearchString function returns true, the code within the corresponding if block will run.

sanjeshwari Nand
.a{fill-rule:evenodd;}techdegree
sanjeshwari Nand
Full Stack JavaScript Techdegree Student 4,673 Points

thank you!