My code error is pretty obvious but I can´t see it.
It's very simple my form ask the height and weight and calculate the corporal mass index the user input height in meters and convert to inches (function works ok)
input kilos and convert to pounds (works ok too) but in this process must calculate the index and write it in another textbox. that's my problem!
What am I doing wrong??? heres my code:
function myFunctionmts() {
var x = document.getElementById("mters");
var y = document.getElementById("inches");
y.value = ((x.value*100)/2.54).toFixed(2);
document.getElementById("mters").value=x.value;
document.getElementById("inches").value=y.value;
}
</script>
<script>
function myFunctionkg() {
var i = document.getElementById("imc");
var p = document.getElementById("inches");
var x = document.getElementById("kilos");
var z = document.getElementById("pounds");
var step1 = 0;
var step2 = 0;
var step3 = 0;
z.value = (x.value/.454).toFixed(2);
libras.value=z.value;
document.getElementById("pounds").value=z.value;
step1.value = z.value*703;
step2.value = step1.value/p.value;
step3.value = (step2.value/p.value).toFixed(1);
document.getElementById("imc").value=step3.value
}
<form method="POST" action="#">
<input type="text" name="mters" id="mters" required onchange="myFunctionmts()">
<input type="text" name="inches" id="inches" placeholder="Inches" readonly>
<input type="text" name="kilos" id="kilos" required onchange="myFunctionkg()">
<input type="text" name="pounds" id="pounds" placeholder="Pounds" readonly>
<input type="text" name="imc" id="imc" readonly>
<input type="submit" value="Save">
</form>
Try to use this code:
HTML :
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Stack Overflow</title>
<link
rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
/>
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<!-- Popper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<form method="POST" action="#">
<label for="mters">meter</label>
<input
type="text"
name="mters"
id="mters"
required
onchange="myFunctionmts()"
/>
<label for="inches">inches</label>
<input
type="text"
name="inches"
id="inches"
placeholder="Inches"
readonly
/>
<label for="kilos">kilos</label>
<input
type="text"
name="kilos"
id="kilos"
required
onchange="myFunctionkg()"
/>
<label for="pounds">pounds</label>
<input
type="text"
name="pounds"
id="pounds"
placeholder="Pounds"
readonly
/>
<label for="imc">imc</label>
<input type="text" name="imc" id="imc" readonly />
<input type="submit" value="Save" />
</form>
<script src="script.js"></script>
</body>
</html>
JS:
function myFunctionmts() {
var x = document.getElementById('mters');
var y = document.getElementById('inches');
y.value = ((x.value * 100) / 2.54).toFixed(2);
document.getElementById('mters').value = x.value;
document.getElementById('inches').value = y.value;
}
function myFunctionkg() {
var imc = document.getElementById('imc'); // mass index
var inches = document.getElementById('inches'); //
var kilos = document.getElementById('kilos');
var pounds = document.getElementById('pounds'); // pounds
var step1 = 0;
var step2 = 0;
var step3 = 0;
pounds.value = (+kilos.value / 0.454).toFixed(2);
// undefined error here, what is this libras all about ???
// libras.value = z.value;
step1 = +pounds.value * 703;
step2 = +step1 / +inches.value;
step3 = (+step2 / +inches.value).toFixed(1);
console.log(step3);
imc.value = step3;
}
Hope it helps.
Related
hey i need help with creating a delete button for my "notes" so it will delete it from the screen and the localstorage (u will notice i tried to make a delBtn function but with no success) i would appreciate if someone could post a fix to mine and explain me where i went wrong.
My JS
const tableBody = document.getElementById("tableBody");
const taskInfo = document.getElementById("taskInfo");
const taskDate = document.getElementById("taskDate");
const taskTime = document.getElementById("taskTime");
const delBtn = document.getElementById("delBtn")
let x = new Task("this is a test", "2021-04-14", "03:19");
let y = new Task("this is a 2nd test", "2021-04-14", "03:19");
//x.add();
//y.add();
let taskList = [
x, y, (new Task("this is a 3rd test", "2021-04-14", "03:19"))
];
if (localStorage.savedTaskList)
taskList = JSON.parse(localStorage.savedTaskList);
displayTable();
function displayTable() {
tableBody.innerHTML = "";
for (let task of taskList) {
const div = document.createElement("div");
div.setAttribute("class","taskZone");
const divTaskInfo = document.createElement("div");
divTaskInfo.setAttribute("class","taskInfo");
const divTaskDate = document.createElement("div");
divTaskDate.setAttribute("class","taskDate");
const divTaskTime = document.createElement("div");
divTaskTime.setAttribute("class","taskTime");
const delBtn = document.createElement("span");
delBtn.setAttribute("class","delBtn");
divTaskInfo.innerText = task.taskInfo;
divTaskDate.innerText = task.taskDate;
divTaskTime.innerText = task.taskTime;
div.append(divTaskInfo, divTaskDate, divTaskTime);
tableBody.appendChild(div);
}
}
delBtn.onclick = function delTask() {
delBtn.parentNode.removeChild(taskZoneElmToDel)
}
function addTask() {
if (taskInfo.value == '' || taskDate.value == '' || taskTime.value == '') {
return alert(`Please fill all the fields.`);
}else{newTask = new Task(taskInfo.value, taskDate.value, taskTime.value);
taskList.push(newTask);
localStorage.savedTaskList = JSON.stringify(taskList);
displayTable();
}
}
Thats the Html part of it
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Task Board</title>
<link rel="stylesheet" href="style.css">
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
</head>
<body>
<div class="scaleable-wrapper" id="scaleable-wrapper">
<div class="very-specific-design" id="very-specific-design">
<header class="Title">
My Task Board
</header>
<div id="Input">
</br>
</br>
<form class="Form" id="formInfo">
<label for="taskInfo">Task Info:</label>
<input type="text" id="taskInfo" name="taskInfo" required autofocus></input></br>
<label for="taskDate">Task Date:</label>
<input type="date" id="taskDate" name="taskDate" required></input></br>
<label for="taskTime">Task Time:</label>
<input type="time" id="taskTime" name="taskTime" required></input></br>
<input type="submit" id="addTaskDiv" class="btn" value="Save" onclick="addTask()"></input>
<input type="reset" id="resetForm" class="btn"></input>
</form>
</br>
</br>
</div>
<div class="outNotes"></div>
<div class="tableBody">
<table>
<tbody id="tableBody">
</tbody>
</table>
</div>
</div>
</div>
<input type="button" id="delBtn">x</input>
</body>
<script src="Task.js"></script>
<script src="script2.js"></script>
</html>
When I run the code on my chrome browser, clicking the calculate button, it does not put the value in the Total and Sales Tax text box.
Also "Add the Javascript event handler for the click event of the Clear button, This should clear all text boxes and move the cursor to the Subtotal field."
I'm using Html and js file. Using a function expression to calculate and display my calculation, then also use the clear button to clear all text boxes.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sales Tax Calculator</title>
<link rel="stylesheet" href="styles.css" />
<script src="sales_tax.js"></script>
</head>
<body>
<main>
<h1>Sales Tax Calculator</h1>
<p>Enter Subtotal and Tax Rate and click "Calculate".</p>
<label for="subtotal">Subtotal:</label>
<input type="text" id="subtotal" ><br>
<label for="tax_rate">Tax Rate:</label>
<input type="text" id="tax_rate" ><br>
<label for="sales_tax">Sales Tax:</label>
<input type="text" id="sales_tax" disabled ><br>
<label for="total">Total:</label>
<input type="text" id="total" disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calculate" >
<input type="button" id="clear" value="Clear" ><br>
</main>
</body>
</html>
This is my js file.
var $ = function (id) {
return document.getElementById(id);
};
var SumSalesTax = function (sub, rate){
var sales_tax = (sub * rate);
sales_tax = sales_tax.toFixed(2);
var total = (sub * rate + sub);
total = total.toFixed(2);
return sales_tax, total;
}
var processEntries = function() {
var sub = parseFloat($("subtotal").value);
var rate = parseFloat($("tax_rate").value);
if (sub < 0 && sub > 10000 && rate < 0 && rate > 12) {
alert("Subtotal must be > 0 and < 1000, and Tax Rate must be >0 and < 12.
")
} else {
$("sales_tax").value = SumSalesTax(sub, rate);
$("total").value = SumSalesTax(sub, rate);
}
};
window.onload = function() {
$("calculate").onclick = processEntries;
$("clear").onclick = sumSalesTax;
};
Sales Tax Calculator
It seems like you had a typo when you were doing $("clear").onclick = sumSalesTax;, as the variable was named SumSalesTax rather than with the lower case. This meant that the code block errored out and therefore didn't actually run. Make sure you make good use of the browser console so you can spot errors like this! The below example should work
var $ = function (id) {
return document.getElementById(id);
};
var SumSalesTax = function (sub, rate){
var sales_tax = (sub * rate);
sales_tax = sales_tax.toFixed(2);
var total = (sub * rate + sub);
total = total.toFixed(2);
return sales_tax, total;
}
var processEntries = function() {
var sub = parseFloat($("subtotal").value);
var rate = parseFloat($("tax_rate").value);
if (sub < 0 && sub > 10000 && rate < 0 && rate > 12) {
alert("Subtotal must be > 0 and < 1000, and Tax Rate must be >0 and < 12.")
} else {
$("sales_tax").value = SumSalesTax(sub, rate);
$("total").value = SumSalesTax(sub, rate);
}
};
window.onload = function() {
$("calculate").onclick = processEntries;
$("clear").onclick = SumSalesTax;
};
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sales Tax Calculator</title>
<link rel="stylesheet" href="styles.css" />
<script src="sales_tax.js"></script>
</head>
<body>
<main>
<h1>Sales Tax Calculator</h1>
<p>Enter Subtotal and Tax Rate and click "Calculate".</p>
<label for="subtotal">Subtotal:</label>
<input type="text" id="subtotal" ><br>
<label for="tax_rate">Tax Rate:</label>
<input type="text" id="tax_rate" ><br>
<label for="sales_tax">Sales Tax:</label>
<input type="text" id="sales_tax" disabled ><br>
<label for="total">Total:</label>
<input type="text" id="total" disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calculate" >
<input type="button" id="clear" value="Clear" ><br>
</main>
</body>
</html>
I'm trying to make a sum of 4 entries in 4 text type and everything seems fine except that when I click the button, it won't set the sum. Like if I enter 1 in each text input, the text input for the sum should show 4. Thanks!
here's my Javascript code :
(function(){
var oForm = document.forms;
oForm[2].querySelector("input[type='button']").
addEventListener("click",
sommeValeur,
false);
}) ()
function sommeValeur() {
var aTxt = document.forms[0].tEx1;
var total = document.forms[0].tEx2;
var txt1 = aTxt[0].value;
var txt2 = aTxt[1].value;
var txt3 = aTxt[2].value;
var txt4 = aTxt[3].value;
total = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
return true;
}
Here's my html code :
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="css/form.css" />
</head>
<body>
<section>
<form name="frm1">
<label> Valeur 1:
<input type="text" name="tEx1" />
</label>
<label> Valeur 2:
<input type="text" name="tEx1" />
</label>
<label> Valeur 3:
<input type="text" name="tEx1" />
</label>
<label> Valeur 4:
<input type="text" name="tEx1" />
</label>
</form>
</section>
<section>
<form name="frm2">
<label> Somme:
<input type="text" name="tEx2" />
</label>
</form>
</section>
<section>
<form name="frm3">
<label>
<input type="button"
value="bouton"
name="btn1" /></br>
</label>
</form>
</section>
</body>
<script src="js/exercise4.js"></script>
</html>
It looks like your input for total is in the second form, so you need form[1] and also you need to use total.value to set the value:
var total = document.forms[1].tEx2;
...
total.value = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
Live example:
(function(){
var oForm = document.forms;
oForm[2].querySelector("input[type='button']").
addEventListener("click",
sommeValeur,
false);
}) ()
function sommeValeur() {
var aTxt = document.forms[0].tEx1;
var total = document.forms[1].tEx2;
var txt1 = aTxt[0].value;
var txt2 = aTxt[1].value;
var txt3 = aTxt[2].value;
var txt4 = aTxt[3].value;
total.value = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
return true;
}
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="css/form.css" />
</head>
<body>
<section>
<form name="frm1">
<label> Valeur 1:
<input type="text" name="tEx1" />
</label>
<label> Valeur 2:
<input type="text" name="tEx1" />
</label>
<label> Valeur 3:
<input type="text" name="tEx1" />
</label>
<label> Valeur 4:
<input type="text" name="tEx1" />
</label>
</form>
</section>
<section>
<form name="frm2">
<label> Somme:
<input type="text" name="tEx2" />
</label>
</form>
</section>
<section>
<form name="frm3">
<label>
<input type="button"
value="bouton"
name="btn1" /></br>
</label>
</form>
</section>
</body>
</html>
You are changing the total instance and not the total.value.
In the line total = ...+...+..+...; you are basically replacing the label with the sum. You should set the label text instead: total.value = ...+..+...+...;
I have this html code with javascript. My average value displays correctly but my find minimum is not displaying anything. Its supposed to show when the user clicks on the find min button on the box.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculate Your Grade</title>
<link rel="stylesheet" href="calc.css">
<script>
var $ = function (id) {
return document.getElementById(id);
}
var calculateGrade = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3=parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) ) {
alert("All three entries must be numeric");
}
else {
var average = (exam1 + exam2 + exam3) / 3;
$("average").value = average;
}
}
var min = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3=parseFloat($("exam3").value);
if ( (exam1<exam2) && (exam1<exam3)){
$("mini").value=exam1;}
else if ((exam2<exam1) && (exam2<exam3)){
$("mini").value=exam2;}
else {
$("mini").value=exam3;
}
}
window.onload = function () {
$("calculate").onclick = calculateGrade;
$("mini").onclick = min;
$("exam1").focus();
}
</script>
</head>
<body>
<section>
<h1>Calculate Average</h1>
<label for="exam1">Exam1:</label>
<input type="text" id="exam1"><br>
<label for="exam2">Exam2:</label>
<input type="text" id="exam2"><br>
<label for="exam3">Exam3:</label>
<input type="text" id="exam3"><br>
<label for="average"></label>
<input type="text" id="average"disabled ><br>
<label> </label>
<input type="button" id="calculate" value="Calc Avg">
<input type="button" id="mini" value="Find min">
</section>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculate Your Grade</title>
<link rel="stylesheet" href="calc.css">
<script>
var $ = function (id) {
return document.getElementById(id);
}
var average = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3 = parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) || isNaN(exam3)) {
alert("All three entries must be numeric");
}
else {
var average = (exam1 + exam2 + exam3) / 3;
$("result").value = average;
}
}
var min = function () {
var exam1 = parseFloat($("exam1").value);
var exam2 = parseFloat($("exam2").value);
var exam3 = parseFloat($("exam3").value);
if (isNaN(exam1) || isNaN(exam2) || isNaN(exam3)) {
alert("All three entries must be numeric");
} else {
$("result").value = Math.min(exam1,exam2,exam3);
}
}
window.onload = function () {
$("average").onclick = average;
$("mini").onclick = min;
$("exam1").focus();
}
</script>
</head>
<body>
<section>
<h1>Calculate</h1>
<label for="exam1">Exam1:</label>
<input type="text" id="exam1"><br>
<label for="exam2">Exam2:</label>
<input type="text" id="exam2"><br>
<label for="exam3">Exam3:</label>
<input type="text" id="exam3"><br>
<label for="average"></label>
<input type="text" id="result" disabled ><br>
<label> </label>
<input type="button" id="average" value="Calc Avg">
<input type="button" id="mini" value="Find min">
</section>
</body>
</html>
The issue is with the min function. Instead of setting the value of textbox (probably, missing in your code example) you are setting the value of button "mini" (which is incorrect).
Update:
You need to be including one more textbox <input type="text" id="txtMin" disabled ><br>
and update your min function to set the value of it, as follows:
$("txtMin").value=exam1;
...
$("txtMin").value=exam2;
...
$("txtMin").value=exam3;
I am making a web app that takes JavaScript vars and puts them into a math problem. The script is
<HTML>
<head>
<meta name="viewport" content="initial-scale=2, user-scalable=no">
<meta name= apple-mobile-web-app-capable content= yes />
<meta name= apple-mobile-web-app-status-bar-style content= black />
<link rel="apple-touch-icon" href="https://dl.dropboxusercontent.com/u/11681462/untitled%20folder/Icon/Icon-SD-Iphone.png" />
<link rel="apple-touch-icon" sizes= 114x114 href="https://dl.dropboxusercontent.com/u/11681462/untitled%20folder/Icon/Icon-HD-Iphone.png" />
<link rel="apple-touch-icon" sizes= 72x72 href="https://dl.dropboxusercontent.com/u/11681462/untitled%20folder/Icon/Icon-SD-Ipad.png" />
<link rel="apple-touch-icon" sizes= 144x144 href="https://dl.dropboxusercontent.com/u/11681462/untitled%20folder/Icon/Icon-HD-Ipad.png" />
<Title> Diabetes Cal </Title>
<script>
function valuechanged() {
var a = document.getElementById('textA').value;
var b = document.getElementById('textB').value;
var t = document.getElementById('textX').value;
var y = document.getElementById('textY').value;
var z = document.getElementById('textZ').value;
var dec = t * 0.1;
var x = parseFloat(dec).toFixed(1);
if (+x - +y < 0) {
var c = 0;
}
else
{
c = +x - +y;
}
if (c < 0) {
var l = 0;
}
else
{
var l = c / z;
}
var d = parseFloat(l).toFixed(2);
if (a / b < 0)
{
var u = 0;
}
else
{
var u = a / b;
}
var e = parseFloat(u).toFixed(2);
document.getElementById('labelS').innerHTML = e;
document.getElementById('labelG').innerHTML = d;
document.getElementById('labelX').innerHTML =
document.getElementById('labelJ').innerHTML = +d + +e;
}
function myFunction(){
var TS=document.getElementById('textB')
var date= new Date();
var time = date.getHours();
if (time<10)
{
CR = "8";
}
else if (time<16)
{
CR = "10";
}
else if (time<20)
{
CR = "5";
}
else
{
CR = "8";
}
TS.value= CR
}
</script>
</head>
<body BGColor=orange onload="valuechanged();myFunction();" > <center><br> Bolus Wizard <br>
<div>
Bg (without Decimal)<br>
<input type="text" pattern=\d* id="textX" min="25" max="333" value="25" onchange="valuechanged();" /><br><label ID="labelX">-----</label> mmol/L<br>
</div><hr width=45% color=black size=0.5>
<div>
Carbs<br> <input type="text" pattern=\d* ID="textA" max=300 value="0" onchange="valuechanged();" /><br>
</div><hr width=45% color=black size=0.5>
<div>
Carb Ratio<br><input type="text" pattern=\d* ID="textB" value="" onchange="valuechanged();" />
</div>
<div>
Target<br><input type="text" pattern=\d* ID="textY" value="6" onchange="valuechanged();" />
</div>
<div>
Correction Factor<br><input type="text" pattern=\d* ID="textZ" value="2" onchange="valuechanged();" />
</div>
<div>
Food<br> <label ID="labelS"> ---</label> Units
</div>
<p>
<div>
Correction<br> <label ID="labelG"> ---</label> Units
</div>
<p>
<div>
You Need...<br> <label ID="labelJ"> --- </label> Units
</div>
<p>
</center>
</body>
</HTML>
I was hoping that someone could help me make a settings page for textB TextY and TextZ. It would need to be on a different page. This web app is being designed for the Iphone and iPad. Also if there is anyway to make the variables change for var CR to a settings (like a text box saying 8am, and another saying 10am) and it saving on the device, could you include it as an answer. Thanks, you would really help alot.