Still getting the hang of Javascript so forgive me if this seems like basic stuff.
I've set up a slider on a web page and the CSS/HTML function perfectly but I'm trying to display a year value to correspond with each value of the slider from 1 to 6.
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = 133;
slider.oninput = function() {
switch (this.value) {
case 1:
output.innerHTML = 133;
break;
case 2:
output.innerHTML = 88;
break;
case 3:
output.innerHTML = 60;
break;
case 4:
output.innerHTML = 44;
break;
case 5:
output.innerHTML = 36;
break;
case 6:
output.innerHTML = 26;
break;
default:
output.innerHTML = 133;
}
output.innerHTML = this.value;
}
<div class="slidecontainer">
<input type="range" min="1" max="6" value="1" class="slider" id="myRange">
<p><span id="demo"></span> BC</p>
</div>
Currently it outputs 1 to 6 so it does function and I can set the default value to 133 before input, it just doesn't push out the values I need once the slider is moved.
Is a switch statement the correct tool for this job and, if so, where have I gone wrong?
this.value returns a string. You need to make it return a number in order for your comparison to work. Or compare against strings. Either way, the below example works. Look how I added parseInt(this.value) inside your switch operator.
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = 133;
slider.oninput = function() {
switch (parseInt(this.value)) {
case 1:
output.innerHTML = 133;
break;
case 2:
output.innerHTML = 88;
break;
case 3:
output.innerHTML = 60;
break;
case 4:
output.innerHTML = 44;
break;
case 5:
output.innerHTML = 36;
break;
case 6:
output.innerHTML = 26;
break;
default:
output.innerHTML = 133;
}
}
<div class="slidecontainer">
<input type="range" min="1" max="6" value="1" class="slider" id="myRange">
<p><span id="demo"></span> BC</p>
</div>
Related
I'm making a calculator for a game I play and whenever I run it, it just returns "NaN" for two values, only one of the values actually returns as it should. The two values that return NaN are the ones that run through switch statements and I found that the values you get from the switch statements are undefined so I think that's where it goes wrong. I tried looking for other questions like this on StackOverflow and I found some but their answers didn't work for me.
var iron_cost = 0
var string_cost = 0
var spider_e_cost = 0
var tami_1_amount = 0
var tami_2_amount = 0
var tami_1_tier = 0
var tami_2_tier = 0
var ta_per_min_1 = 0
var ta_per_min_2 = 0
var cpt_tpc = 0
var cph_tpc = 0
var cpd_tpc = 0
function calculate_tpc() {
var string_cost = document.getElementById("string_tpc").value;
var spider_e_cost = document.getElementById("spider_eye_tpc").value;
var iron_cost = document.getElementById("iron_tpc").value;
var tami_1_tier = document.getElementById("minions_tier_1_tpc").value;
var tami_2_tier = document.getElementById("minions_tier_2_tpc").value;
var tami_1_amount = document.getElementById("minions_1_tpc").value;
var tami_2_amount = document.getElementById("minions_2_tpc").value;
var step1 = string_cost * 3.16;
var step2 = iron_cost * 0.2;
var step3 = step1 + step2 + spider_e_cost;
switch (tami_1_tier) {
case 1:
var ta_per_min_1 = 2;
break;
case 2:
var ta_per_min_1 = 2;
break;
case 3:
var ta_per_min_1 = 2.3;
break;
case 4:
var ta_per_min_1 = 2.3;
break;
case 5:
var ta_per_min_1 = 2.6;
break;
case 6:
var ta_per_min_1 = 2.6;
break;
case 7:
var ta_per_min_1 = 3.15;
break;
case 8:
var ta_per_min_1 = 3.15;
break;
case 9:
var ta_per_min_1 = 4.1;
break;
case 10:
var ta_per_min_1 = 4.1;
break;
case 11:
var ta_per_min_1 = 6;
break;
}
switch (tami_2_tier) {
case 1:
var ta_per_min_2 = 2;
break;
case 2:
var ta_per_min_2 = 2;
break;
case 3:
var ta_per_min_2 = 2.3;
break;
case 4:
var ta_per_min_2 = 2.3;
break;
case 5:
var ta_per_min_2 = 2.6;
break;
case 6:
var ta_per_min_2 = 2.6;
break;
case 7:
var ta_per_min_2 = 3.15;
break;
case 8:
var ta_per_min_2 = 3.15;
break;
case 9:
var ta_per_min_2 = 4.1;
break;
case 10:
var ta_per_min_2 = 4.1;
break;
case 11:
var ta_per_min_2 = 6;
break;
}
var step4 = ta_per_min_1 * tami_1_amount;
var step5 = ta_per_min_2 * tami_2_amount;
var step6 = step4 + step5;
var step7 = step6 * step3;
var step8 = step7 * 60;
var step9 = step8 * 24;
document.getElementById("cpt_tpc").innerHTML = step3;
document.getElementById("cph_tpc").innerHTML = step8;
document.getElementById("cpd_tpc").innerHTML = step9;
document.getElementById("test1").innerHTML = ta_per_min_1;
document.getElementById("test2").innerHTML = ta_per_min_2;
}
html,
body {
text-align: center;
}
;
<html>
<head>
<link rel="stylesheet" type="text/css" href="interface.css" />
<body>
<h1>Calculator</h1>
<br /> String Price: <input type="text" id="string_tpc" value="0">
<br /> Spider Eye Price: <input type="text" id="spider_eye_tpc" value="0">
<br /> Iron Price: <input type="text" id="iron_tpc" value="0">
<br /> Minions Tier 1: <input type="text" id="minions_tier_1_tpc" value="0"> Minion Amount 1: <input type="text" id="minions_1_tpc" value="0">
<br /> Minions Tier 2: <input type="text" id="minions_tier_2_tpc" value="0"> Minion Amount 2: <input type="text" id="minions_2_tpc" value="0">
<br />
<button onclick="calculate_tpc()">Calculate</button>
<br /> Current Coins per Tarantula: <span id="cpt_tpc">0</span>
<br /> Coins per hour: <span id="cph_tpc">0</span>
<br /> Coins per day: <span id="cpd_tpc">0</span>
<script type="text/javascript" src="main.js"></script>
</body>
</head>
</html>
The main problem is to use strings from input. The further effect is to get no values from the switch statements, because the value is a string and in all cases, you have numbers. The comparison is here strict, like ===.
For unknown values, you could return the function and omit calculation with not given values.
'use strict';
function calculate_tpc() {
var string_cost = +document.getElementById("string_tpc").value;
var spider_e_cost = +document.getElementById("spider_eye_tpc").value;
var iron_cost = +document.getElementById("iron_tpc").value;
var tami_1_tier = +document.getElementById("minions_tier_1_tpc").value;
var tami_2_tier = +document.getElementById("minions_tier_2_tpc").value;
var tami_1_amount = +document.getElementById("minions_1_tpc").value;
var tami_2_amount = +document.getElementById("minions_2_tpc").value;
var step1 = string_cost * 3.16;
var step2 = iron_cost * 0.2;
var step3 = step1 + step2 + spider_e_cost,
ta_per_min_1,
ta_per_min_2;
switch (tami_1_tier) {
case 1:
case 2:
ta_per_min_1 = 2;
break;
case 3:
case 4:
ta_per_min_1 = 2.3;
break;
case 5:
case 6:
ta_per_min_1 = 2.6;
break;
case 7:
case 8:
ta_per_min_1 = 3.15;
break;
case 9:
case 10:
ta_per_min_1 = 4.1;
break;
case 11:
ta_per_min_1 = 6;
break;
default: return;
}
switch (tami_2_tier) {
case 1:
case 2:
ta_per_min_2 = 2;
break;
case 3:
case 4:
ta_per_min_2 = 2.3;
break;
case 5:
case 6:
ta_per_min_2 = 2.6;
break;
case 7:
case 8:
ta_per_min_2 = 3.15;
break;
case 9:
case 10:
ta_per_min_2 = 4.1;
break;
case 11:
ta_per_min_2 = 6;
break;
default: return;
}
var step4 = ta_per_min_1 * tami_1_amount;
var step5 = ta_per_min_2 * tami_2_amount;
var step6 = step4 + step5;
var step7 = step6 * step3;
var step8 = step7 * 60;
var step9 = step8 * 24;
document.getElementById("cpt_tpc").innerHTML = step3;
document.getElementById("cph_tpc").innerHTML = step8;
document.getElementById("cpd_tpc").innerHTML = step9;
//document.getElementById("test1").innerHTML = ta_per_min_1;
//document.getElementById("test2").innerHTML = ta_per_min_2;
}
<h1>Calculator</h1>
<br /> String Price: <input type="text" id="string_tpc" value="0">
<br /> Spider Eye Price: <input type="text" id="spider_eye_tpc" value="0">
<br /> Iron Price: <input type="text" id="iron_tpc" value="0">
<br /> Minions Tier 1: <input type="text" id="minions_tier_1_tpc" value="0"> Minion Amount 1: <input type="text" id="minions_1_tpc" value="0">
<br /> Minions Tier 2: <input type="text" id="minions_tier_2_tpc" value="0"> Minion Amount 2: <input type="text" id="minions_2_tpc" value="0">
<br />
<button onclick="calculate_tpc()">Calculate</button>
<br /> Current Coins per Tarantula: <span id="cpt_tpc">0</span>
<br /> Coins per hour: <span id="cph_tpc">0</span>
<br /> Coins per day: <span id="cpd_tpc">0</span>
var deviceName = '';
if(deviceName == 'sampleOne'){
newName = 'One'
}
if(deviceName == 'sampleTwo'){
newName = 'Two'
}
if(deviceName == 'sampletThree'){
newName = 'Three'
}
I have this simple if statement for Javascript.
How it works?
When a data inputed is sampleOne the output will be One. That's it, very simple right?
Take note that this code is working fine. But my problem is I have so many sample and I think using this kind of If statement is a bad idea because it will be too long. Is there a way to shorten this if statament?
If you have a lot of these you can make an object that maps the deviceName to the newName. Then you can just look it up:
let lookup = {
'sampleOne': 'One',
'sampleTwo': 'Two' ,
'sampleThree': 'Three'
}
let deviceName = 'sampleTwo'
let newname = lookup[deviceName]
console.log(newname)
You can use switch statement:
var deviceName = 'sampleFour';
var newName;
switch (deviceName) {
case 'sampleOne':
newName = 'One';
break;
case 'sampleTwo':
newName = 'Two';
break;
case 'sampleThree':
newName = 'Three';
break;
case 'sampleFour':
newName = 'Four';
break;
case 'sampleFive':
newName = 'Five';
}
console.log(newName);
var deviceName = "sampleOne";
newName =deviceName.split('sample')[1];
console.log(newName );
If your value starts with sample just use this logic
You can use switch statement. Find an example below:
<html>
<body>
<input id="myInput" type="text">
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var text;
var deviceName = document.getElementById("myInput").value;
switch(deviceName ) {
case "sampleOne":
text = "One";
break;
case "sampleTwo":
text = "Two";
break;
case "sampletThree":
text = "Three";
break;
default:
text = "No Match";
}
document.getElementById("demo").innerHTML = text;
}
</script>
</body>
</html>
You can also use a Switch instead of IF condition. Switch can be used if you want to do multiple operations in conditions.
var deviceName = 'sampleOne';
switch(deviceName)
{
case 'sampleOne':
newName = 'One';
break;
case 'sampleTwo':
newName ='Two';
break;
case 'sampleThree':
newName ='Three';
break;
default:
break;
}
I'm having some trouble getting my change() event working in jQuery. I am making a small program that converts temperatures to Kelvin, and I want the span that holds my value after conversion to update 1) every time the temperature to convert changes and 2) every time a different temperature scale is selected from the radio buttons.
Relevant Code:
$(document).ready(function() {
$('input[type=radio]').checkboxradio();
var temp = parseFloat()
$('input.listener').change(function() {
var name = $(this).attr("name");
var val = $(this).val();
switch (name) {
case 'unit':
var temperature = $('input#temp').val();
switch (val) {
case 'f':
$('span#output').html(((temperature - 32) / 1.8) + 273.15);
break;
case 'c':
$('span#output').html(temperature + 273.15);
break;
case 'r':
$('span#output').html(temperature / 1.8);
break;
}
case 'temp':
var u = $('input[name=unit]:checked').val();
switch (u) {
case 'f':
$('span#output').html(((val - 32) / 1.8) + 273.15);
break;
case 'c':
$('span#output').html(val + 273.15);
break;
case 'r':
$('span#output').html(val / 1.8);
break;
}
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="widget">
<fieldset>
<legend>Select a Unit to Convert to Kelvin: </legend>
<label for="fRadio">Fahrenheit</label>
<input id="fRadio" class="listener" type="radio" name="unit" value="f">
<label for="cRadio">Celsius</label>
<input id="cRadio" class="listener" type="radio" name="unit" value="c">
<label for="rRadio">Rankine</label>
<input id="rRadio" class="listener" type="radio" name="unit" value="r">
</fieldset>
</div>
<h2>Temperature Converter</h2>
<p>Type a value in the Fahrenheit field to convert the value to Kelvin:</p>
<p>
<label>Temperature</label>
<input id="temp" class="listener" type="number" value="32">
</p>
<p>Kelvin: <span id="output"></span></p>
My guess is I'm making a pretty dumb small mistake, but I can't seem to figure it out. Thanks for any and all help, suggestions, and solutions.
Two mistakes with your code:
Forgetting breaks; for the parent switch statement.
Forgetting name="temp" on the temperature field.
I changed the final temperature to a variable and made that the text of the output just so that there would be so many $('span#output').html(temperature);
Also, you should use the oninput event to detect a change for the number field.
$(document).ready(function() {
//$('input[type=radio]').checkboxradio();
var temp = parseFloat();
$('input.listener').on('change', updateTemp);
$('input.listener').on('input', updateTemp);
function updateTemp() {
var name = $(this).attr("name");
var val = $(this).val();
var final;
switch (name) {
case 'unit':
var temperature = $('input#temp').val();
switch (val) {
case 'f':
final = ((temperature - 32) / 1.8) + 273.15;
break;
case 'c':
final = temperature + 273.15;
break;
case 'r':
final = temperature / 1.8;
break;
}
break;
case 'temp':
var u = $('input[name=unit]:checked').val();
switch (u) {
case 'f':
final = ((val - 32) / 1.8) + 273.15;
break;
case 'c':
final = val + 273.15;
break;
case 'r':
final = val / 1.8;
break;
}
break;
}
$("#output").text(final);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="widget">
<fieldset>
<legend>Select a Unit to Convert to Kelvin: </legend>
<label for="fRadio">Fahrenheit</label>
<input id="fRadio" class="listener" type="radio" name="unit" value="f">
<label for="cRadio">Celsius</label>
<input id="cRadio" class="listener" type="radio" name="unit" value="c">
<label for="rRadio">Rankine</label>
<input id="rRadio" class="listener" type="radio" name="unit" value="r">
</fieldset>
</div>
<h2>Temperature Converter</h2>
<p>Type a value in the Fahrenheit field to convert the value to Kelvin:</p>
<p>
<label>Temperature</label>
<input id="temp" class="listener" type="number" name="temp" value="32">
</p>
<p>Kelvin: <span id="output"></span></p>
You should set one of the radio buttons as default with checked="checked". Then try following:
$(document).ready(function () {
$('input.listener').change(function () {
if ($(this).attr("type") == 'radio') {
//radio button changed
var u = $(this).val();
} else {
var u = $("input[type='radio']:checked").val();
}
var temperature = $('#temp').val();
switch (u) {
case 'f':
$('span#output').html(((temperature - 32) / 1.8) + 273.15);
break;
case 'c':
$('span#output').html(temperature + 273.15);
break;
case 'r':
$('span#output').html(temperature / 1.8);
break;
}
});
});
You do not have break; after
case 'unit':
and when var name = "temp"
var val = $(this).val();
the value of var val above would be a number in string format, so when you do val + something in case 'temp' the number is getting appended instead getting added or substracted. Use parseInt(val) to convert the value of input box to integer in case of 'temp'.
I have basic form with input text boxes and a checkboxes. The example currently shows two items. I am trying to use a switch case to determine what was checked and then calculate a total based on the quantity and user selection. I am getting an error inside the switch case for mufin1.checked == true. How can get the proper value to be returned? JSFIDDLE
JS
function charge(){
var q_muffin1 = document.getElementById('muffin_quantity1');
var muffin1 = document.getElementById('muffin1');
var q_muffin2 = document.getElementById('muffin_quantity2');
var muffin2 = document.getElementById('muffin2');
var charge;
var form = document.getElementById("muffinOrder");
var checkbox = form.getElementsByTagName("checkbox");
switch (checkbox.checked) {
case (mufin1.checked == true):
charge += q_muffin1 * muffin1;
break;
case (mufin2.checked == true):
charge += q_muffin2 * muffin2;
break;
default:
window.alert("Sorry, we are out of");
}
window.alert("Your total is: $" + charge);
return false;
}
html
<form action="" id="muffinOrder" onsubmit="return charge()">
Quantity: <input type="text" name="muffin_quantity1" id="muffin_quantity1"><input type="checkbox" name="muffin1" id="muffin1" value=".59">Blueberry Muffin .59¢<br />
Quantity: <input type="text" name="muffin_quantity2" id="muffin_quantity2"><input type="checkbox" name="muffin2" id="muffin2" value=".69">Banana Nutted Muffin .90¢<br />
<input type="submit" value="Submit" >
</form>
Assuming you don't want to handle the case where both checkboxes are checked, you could write it like this :
switch (true) {
case (mufin1.checked):
charge += q_muffin1 * muffin1;
break;
case (mufin2.checked):
charge += q_muffin2 * muffin2;
break;
default:
window.alert("Sorry, we are out of");
}
But your whole code would probably be cleaner without those variables xxx1 and xx2. I'm not sure of the whole goal but this could be something like that :
var charge = 0;
[1,2].forEach(function(id){
var muffin = document.getElementById('muffin'+id);
var q_muffin = document.getElementById('muffin_quantity'+id).value;
if (muffin.checked) charge += q_muffin;
});
window.alert("Your total is: $" + charge);
string str=Convert.toString(checkbox.checked);//int return With Null Value in ""
switch (str.toUpper()) {
case "TRUE":
charge += q_muffin1 * muffin1;
break;
case "FALSE":
charge += q_muffin2 * muffin2;
break;
default:
window.alert("Sorry, we are out of");
}
window.alert("Your total is: $" + charge);
CHECK This
My task is checking what an user keys in. If he keys in "Mars", he gets the value.
PLanet: <input type="text" id="form_1">
<input type="submit" onClick="send()" value="Send">
<script>
var planetEntered = document.getElementById('form_1').value;
var plantesLength = new Array(3);
plantesLength['Mars'] = 52;
plantesLength['Venera'] = 30;
plantesLength['Earth'] = 10;
plantesLength['Merkyriy'] = 60;
alert(plantesLength['Merkyriy']);
function send() {
switch(form_1) {
case 'Mars':
alert(plantesLength['Mars']);
break;
case 'Venera':
alert(plantesLength['Venera']);
break;
case 'Earth':
alert(plantesLength['Earth']);
break;
case 'Merkyriy':
alert(plantesLength['Merkyriy']);
break;
default:
alert("К сожалению, мы не нашли ни одну программу.");
break;
}
}
The function returns default-block. How to fix? Thanks.
try this
you have to get the input values inside the send function.
Demo Link http://jsbin.com/ejaSUTiH/1/
PLanet: <input type="text" id="form_1">
<input type="submit" onClick="send()" value="Send">
<script>
var plantesLength = new Array(3);
plantesLength['Mars'] = 52;
plantesLength['Venera'] = 30;
plantesLength['Earth'] = 10;
plantesLength['Merkyriy'] = 60;
alert(plantesLength['Merkyriy']);
function send() {
var planetEntered = document.getElementById('form_1').value;
console.log(planetEntered);
switch(planetEntered) {
case 'Mars':
alert(plantesLength['Mars']);
break;
case 'Venera':
alert(plantesLength['Venera']);
break;
case 'Earth':
alert(plantesLength['Earth']);
break;
case 'Merkyriy':
alert(plantesLength['Merkyriy']);
break;
default:
alert("К сожалению, мы не нашли ни одну программу.");
break;
}
}
</script>
You've to declare a variable inside the function send(): And set
planetEntered in switch case for checking:
function send() {
var planetEntered = document.getElementById('form_1').value; // Here
switch(planetEntered) { // Change
}
}
JS Fiddle Demo
You don't assign the value of the input box in the send() method so it's value is the default (empty) when send() is called.