Below is how I tried to retain the form values using JavaScript, but it is not working:
<form action="" method="Post" onload="saveData();">
<Label>1. What is your favourite browser?</Label>
<select id="browserValue">
<option value="Internet Explorer">Internet Explorer</option>
<option value="Firefox">Firefox</option>
<option value="Chrome">Chrome</option>
<option value="Opera">Opera</option>
<option value="Safari">Safari</option>
</select>
<br>
<br>
<Label>2. What is your favourite food group?</Label>
<select id="foodValue">
<option value="Meats/Alternatives">Meats/Alternatives</option>
<option value="Vegetables">Vegetables</option>
<option value="Dairy Products">Dairy Products</option>
<option value="Fruits">Fruits</option>
<option value="Grains">Grains</option>
<option value="Confections (Junk Food)">Confections (Junk Food)</option>
</select>
<br>
<br>
<Label>3. What is your favourite game genre?</Label>
<select id="gameValue">
<option value="FPS">First Person Shooter (Ex: Halo, Call of Duty)</option>
<option value="TPS">Third Person Shooter (Ex: Ghost Recon, Gear of War)</option>
<option value="Puzzle">Puzzle (Ex: Sudoku, Minesweeper)</option>
<option value="Sim">Simulation (Ex: Minecraft, SimCity)</option>
<option value="Other">Other (Please specify the genre)</option>
</select>
<br>
<br>
<input type="button" value="Submit">
</form>
<script>
function saveData(){
var q1 = document.getElementById("browserValue").onChange().value;
var a = localStorage.setItem("browsers", q1);
var q2 = document.getElementById("foodValue").onChange().value;
var b = localStorage.setItem("food", q2);
var q3 = document.getElementById("gameValue").onChange().value;
var c = localStorage.setItem("game", q3);
}
document.getElementById("browserValue").value = a;
document.getElementById("foodValue").value = b;
document.getElementById("gameValue").value = c;
</script>
I have created a fiddle and it seems to be working: http://jsfiddle.net/4hsxjhnd/1/
HTML
<form action="" method="Post">
<Label>1. What is your favourite browser?</Label>
<select id="browserValue">
<option value="Internet Explorer">Internet Explorer</option>
<option value="Firefox">Firefox</option>
<option value="Chrome">Chrome</option>
<option value="Opera">Opera</option>
<option value="Safari">Safari</option>
</select>
<br>
<br>
<Label>2. What is your favourite food group?</Label>
<select id="foodValue">
<option value="Meats/Alternatives">Meats/Alternatives</option>
<option value="Vegetables">Vegetables</option>
<option value="Dairy Products">Dairy Products</option>
<option value="Fruits">Fruits</option>
<option value="Grains">Grains</option>
<option value="Confections (Junk Food)">Confections (Junk Food)</option>
</select>
<br>
<br>
<Label>3. What is your favourite game genre?</Label>
<select id="gameValue">
<option value="FPS">First Person Shooter (Ex: Halo, Call of Duty)</option>
<option value="TPS">Third Person Shooter (Ex: Ghost Recon, Gear of War)</option>
<option value="Puzzle">Puzzle (Ex: Sudoku, Minesweeper)</option>
<option value="Sim">Simulation (Ex: Minecraft, SimCity)</option>
<option value="Other">Other (Please specify the genre)</option>
</select>
<br>
<br>
<input type="button" value="Submit" onclick="savecode()">
<input type="button" value="Reload" onclick="getcode()">
</form>
JS:
//Script
function savecode()
{
localStorage.setItem("browsers", $("#browserValue").val());
localStorage.setItem("food", $("#foodValue").val());
localStorage.setItem("game", $("#gameValue").val());
}
function getcode()
{
alert(localStorage.getItem("browsers"));
document.getElementById("browserValue").value = localStorage.getItem("browsers");
document.getElementById("foodValue").value = localStorage.getItem("food");
document.getElementById("gameValue").value = localStorage.getItem("game");
}
A few things I learnt while solving this were that: onload works only with body see here
Also, I read about either wrapping onchange in document ready or attaching an event listener to it to trigger the event properly: event listener, ready event
I have modified the program slightly. If you press the reload, it will fetch the values from local storage instead of the values auto-filling on page refresh which can be easily changed. Also, I am using the submit button instead of onchange.
I hope this helps!