javascript - Session Storage: how to store multiple objects - Stack Overflow

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Im trying to store multiple student objects (built from a form submission) into session storage and then eventually loop over session storage and display them on a page. Im not very familiar with any of this and its my first crack at it... How do i store multiple students ? i feel like i need an append... im just overwriting every time... Thanks !

btw... must be pure JS

HTML

             <div id="infoStyle" class="col-lg-6 center-block infoWindow animated">
                <span class="glyphicon glyphicon-user" aria-hidden="true"></span>
                <h4>First Name : <input id="fName" type="text" pattern="[A-Za-z]{50}" title="50 characters or less"></h4>
                <h4>Last Name : <input id="lName" type="text" pattern="[A-Za-z]{50}" title="50 characters or less"></h4>
                <h4>Email Address : <input id="email" type="email"></h4>
                <br>
                <a onclick="createStudent()" class="btn btn-info" role="button">Create Student</a>
                <br><br>
                <a onclick="cancel()" class="btn btn-danger" role="button">Cancel</a>
             </div>

JS

    function createStudent(){

    var student = new Object();

    student.fName = document.getElementById('fName').value;
    student.lName = document.getElementById('lName').value;
    student.email = document.getElementById('email').value;

    sessionStorage.setItem('student', JSON.stringify(student));

    var retrievedObject = sessionStorage.getItem('student');
    console.log('retrievedObject: ', JSON.parse(retrievedObject));

}

Im trying to store multiple student objects (built from a form submission) into session storage and then eventually loop over session storage and display them on a page. Im not very familiar with any of this and its my first crack at it... How do i store multiple students ? i feel like i need an append... im just overwriting every time... Thanks !

btw... must be pure JS

HTML

             <div id="infoStyle" class="col-lg-6 center-block infoWindow animated">
                <span class="glyphicon glyphicon-user" aria-hidden="true"></span>
                <h4>First Name : <input id="fName" type="text" pattern="[A-Za-z]{50}" title="50 characters or less"></h4>
                <h4>Last Name : <input id="lName" type="text" pattern="[A-Za-z]{50}" title="50 characters or less"></h4>
                <h4>Email Address : <input id="email" type="email"></h4>
                <br>
                <a onclick="createStudent()" class="btn btn-info" role="button">Create Student</a>
                <br><br>
                <a onclick="cancel()" class="btn btn-danger" role="button">Cancel</a>
             </div>

JS

    function createStudent(){

    var student = new Object();

    student.fName = document.getElementById('fName').value;
    student.lName = document.getElementById('lName').value;
    student.email = document.getElementById('email').value;

    sessionStorage.setItem('student', JSON.stringify(student));

    var retrievedObject = sessionStorage.getItem('student');
    console.log('retrievedObject: ', JSON.parse(retrievedObject));

}

• javascript
• javascript-objects
• session-storage

Share Improve this question Follow asked Feb 19, 2015 at 12:47 JayDJayD 6,55144 gold badges2121 silver badges2424 bronze badges 0

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2 Answers 2

Sorted by: Reset to default 4

1) You need to store into an array, but before that you will need to check if the array student already exists on sessionStorage or not.

2) Then add a new student to the array, and store it into localstorage

3) while you retrive the data there is no change, it correct what you have written

function createStudent(){


      // this is how you set it
    var newStudent = new Object();

    newStudent .fName = document.getElementById('fName').value;
    newStudent .lName = document.getElementById('lName').value;
    newStudent .email = document.getElementById('email').value;

    if(sessionStorage.student)
    {
     student= JSON.parse(sessionStorage.getItem('student'));
    }else{
     student=[];
    }
    student.push(newStudent )
    sessionStorage.setItem('student', JSON.stringify(student));

       // this is how you will retrive it

    var retrievedObject = sessionStorage.getItem('student');
    console.log('retrievedObject: ', JSON.parse(retrievedObject));

}

Here is the jsfiddle

working...

    function createStudent(){

    var newStudent = new Object();

    newStudent.fName = document.getElementById('fName').value;
    newStudent.lName = document.getElementById('lName').value;
    newStudent.email = document.getElementById('email').value;

    if(sessionStorage.student)
    {
     student= JSON.parse(sessionStorage.getItem('student'));
    }else{
     student=[];
    }
 student.push(newStudent )   
    console.log(student);
    sessionStorage.setItem('student', JSON.stringify(student));

    var retrievedObject = sessionStorage.getItem('student');
    console.log('retrievedObject: ', JSON.parse(retrievedObject));


}

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