Hi so yes this is a previous issue i have had, i have hit the books and whent back to basics adjusted a few things but im still having trouble getting the input value to push to the array can some one please help me get my head around this thanks
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
var number=["1"]
function myFunction()
{
var x=document.getElementById("box");
number.push=document.getElementById("input").value;
x.innerHTML=number.join('<br/>');
}
</script>
<form>
<input id="input" type=text>
<input type=button onclick="myFunction()" value="Add Number"/>
</form>
<div id="box"; style="border:1px solid black;width:150px;height:150px;overflow:auto">
</div>
</body>
</html>
Here is the mistake:
number.push(document.getElementById("input").value);
push is a method, not an attribute ;-)
JSFiddle
PS: Why the ; after id="box"; ? You should fix that too..! ;-)
You were close, here's the working code:
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
var number = [];
function myFunction()
{
var x = document.getElementById("box");
number.push(document.getElementById("input").value);
x.innerHTML = number.join('<br/>');
}
</script>
<form>
<input id="input" type=text>
<input type=button onclick="myFunction()" value="Add Number"/>
</form>
<div id="box" style="border:1px solid black;width:150px;height:150px;overflow:auto">
</div>
</body>
</html>
Related
When I'm running this code it is not showing me the message which I want to display (i.e: res).Suppose I'm giving an input "$code$".Can anyone just help me out?
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<h1>Enter a sample message</h1>
<form>
<input type="text" name="a" id="a">
<button onclick="parse()">submit</button>
<p id="a"></p>
</form>
<script>
function parse(){
var msg=document.getElementById("a").innerHTML;
var res=msg.replace("$code$","1101");
document.getElementById("a").innerHTML=res;//this is to print res.
}
</script>
</body>
</html>
Two elements can't have the same ID. Further, an input element's value can not be obtained using the innerHTML property. Also, on clicking the submit button, the page will reload since the form get's submitted. To prevent that, call the function parse in an onsubmit on the <form> tag, and return false from the function.
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<h1>Enter a sample message</h1>
<form onsubmit="return parse();">
<input type="text" name="a" id="a">
<button type="submit">submit</button>
<p id="b"></p>
</form>
<script>
function parse(){
var msg = document.getElementById("a").value;
document.getElementById("b").innerHTML = msg;
return false;
}
</script>
</body>
</html>
Check this:
<form>
<input type="text" name="a" class="input_field" id="a">
<button type="button" onclick="parse()">submit</button>
<p id="a"></p>
</form>
<script>
function parse(){
var msg=document.getElementById("a").innerHTML;
var form = document.getElementsByTagName("form")[0]
msg = form.getElementsByClassName("input_field")[0].value;//this is to print res.
}
</script>
I added type="button" to the button to prevent the form from reloading the page
I am getting back into javascript for a job I am going to start soon. for some reason i forgot how to do a simple calculator. I dont understand why my even onclick is null when it is a button. I am sure this is a very simple answer I just cant see it.
if(document.getElementById("add").onclick == true){
alert("hey");}
<!DOCTYPE html>
<html>
<head>
<title>TEST</title>
<script src= "script.js"> </script>
</head>
<body>
<h3> Calculator: </h3>
<input type="text" name="a">
<input type="text" name="b">
<input type="button" value="+" name="add">
</body>
</html>
To get you started I made minor changes to your code, go through the changes and understand the use of each change.
function sum(){
var a = document.getElementById("a");
var b = document.getElementById("b");
alert(Number(a.value) + Number(b.value));
}
<!DOCTYPE html>
<html>
<head>
<title>TEST</title>
<script src= "script.js"> </script>
</head>
<body>
<h3> Calculator: </h3>
<input type="text" name="a" id="a">
<input type="text" name="b" id="b">
<input type="button" onClick="sum()" value="+" name="add">
</body>
</html>
I am absolutely new to javascript. I am trying to create my first html page and add some javascript on my html tags. I want to have two boxes where I can input any number and click on Show me! in order to get the result. I wrote the code below but is doesn't do anything:
<!DOCTYPE html>
<html>
<head>
<title>Interactive JS homework</title>
<style>
</style>
<script>
function calculate(){
var a = parseFloat(document.getElementById("a").value);
var b = parseFloat(document.getElementById("b").value);
document.getElementById("result") == a+b;
}
</script>
</head>
<body>
<form>
<p>
<input type="text" id="a" oninput="calculate();">
<input type="text" id="b" oninput="calculate();">
<input type="button" id="showme" value="Show me!" onclick="calculate();">
<input type="text" id="result">
</p>
</form>
</body>
Any help with where I am wrong?
Many thanks in advance!
You have to use the value property of the element. Please notice the changes in the operator used, it should be assignment (=) not compariosn (==).
document.getElementById("result").value = a+b;
I will also suggest you to assign 0 when there is no value in the element. This will prevent showing unexpected NaN as result if any of the element's value is empty.
<!DOCTYPE html>
<html>
<head>
<title>Interactive JS homework</title>
<style>
</style>
<script>
function calculate(){
var val1 = document.getElementById("a").value.trim();
var val2 = document.getElementById("b").value.trim();
var a = parseFloat(val1 == ""? 0 : val1);
var b = parseFloat(val2 == ""? 0 : val2);
document.getElementById("result").value = a+b;
}
</script>
</head>
<body>
<form>
<p>
<input type="text" id="a" oninput="calculate();">
<input type="text" id="b" oninput="calculate();">
<input type="button" id="showme" value="Show me!" onclick="calculate();">
<input type="text" id="result">
</p>
</form>
</body>
Well, it seems you merely forgot a little thing.
When reading the values of the a and b text boxes, you correctly used .value after retrieving the elements to access their value, but when you tried to set the value of result text box, you instead just compared it to the value of a+b. The == operator is for comparison, not setting a value.
Just as well, you will need to set the .value of the result text box, instead of the text box itself.
<!DOCTYPE html>
<html>
<head>
<title>Interactive JS homework</title>
<style>
</style>
<script>
function calculate(){
var a = parseFloat(document.getElementById("a").value);
var b = parseFloat(document.getElementById("b").value);
document.getElementById("result").value = a+b;
}
</script>
</head>
<body>
<form>
<p>
<input type="text" id="a" oninput="calculate();">
<input type="text" id="b" oninput="calculate();">
<input type="button" id="showme" value="Show me!" onclick="calculate();">
<input type="text" id="result">
</p>
</form>
</body>
I cannot seem to be able to add a LI to UL using jQuery. When I click on the button, nothing happens.
Here is a quick fiddle which depicts the problem I am facing:
https://jsfiddle.net/80ugxpx7/2/
The JavaScript and HTML markup in question:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="jquery.min.js"></script>
<style type="text/css">
</style>
<script type="text/javascript">
/* declare global variable */
var recent = []
function add_to_recent() {
var x = document.getElementById('fileno').value
recent.push(x)
$("#recent ul").append('<li>'+x+'</li>')
}
</script>
</head>
<body>
<input type="fileno" type="text"><input type="button" value="search" onclick="add_to_recent()">
<br>
<ul id="recent">
<li>lol</li>
</ul>
</body>
</html>
OK I had to move your function around a bit,
you were mixing Pure JS and Jquery so I've made it all Jquery.
https://jsfiddle.net/link2twenty/80ugxpx7/4/
<input id="fileno" type="text">
<input type="button" value="search" onclick="add_to_recent()">
<br>
<ul id="recent"></ul>
var recent = []
add_to_recent = function () {
var x = $('#fileno').val();
recent.push(x);
$("#recent").append('<li>' + x + '</li>');
$('#fileno').val("");
}
One line solution:
<input id="fileno" type="text">
<input type="button" value="search" onclick="$('#recent').append('<li>'+$('#fileno').val()+'</li>');">
<br>
<ul id="recent">
</ul>
i want to write the value in textbox under it,how can i do it?thanks in advance
i wrote this codes:
<html>
<head>
<script language="javascript">
function show (text){
document.write("text");
}
</script>
</head>
<body>
<input type=textbox name=textbox value="Insert Name"/>
<input type=button name=button value="OK" onclick=show(textbox.value)/>
</body>
</html>
first of all: document.write replaces document content, use window.alert or such
next, consider enclosing fields in the <form> and then use show(this.form.textbox.value)
thats besides other scripting errors :)
Modify your html like this:
<input type=textbox name=textbox value="Insert Name" id="txt" />
<span id="spn"></span>
<input type=button name=button value="OK" onclick="show();" />
And JavaScript like this:
function show(){
document.getElementById('spn').innerHTML = document.getElementById('txt').value;
}
Something like this should work: Working example
<html>
<head>
<script language="javascript">
function show (text){
document.getElementById("text").innerHTML = text;
}
</script>
</head>
<body>
<input type=textbox name=textbox id=textbox value="Insert Name"/>
<input type=button name=button value="OK" onclick="show(document.getElementById('textbox').value)"/>
<div id="text"></div>
</body>
</html>