I have one simple html page with a text field that asks for user's name. i want to save what user enter and on another page i want to retrieve that name and say hello + (user's name).
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>LocalStorage</title>
</head>
<body>
<form>
<p>Enter your name</p>
<input type="text">
<button type="submit" value="submit">Submit</button>
</form>
</body>
</html>
and the second page is where the data from first page comes (through localStorage).
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>secondPage</title>
</head>
<body>
<h1>Hello </h1>
</body>
</html>
thank you.
I'm not sure if this is a homework assignment but this should get you started.
It will involve:
First storing the data into localStorage
Then directing the user over to the second page - most likely through window.location.href.
Then pulling the data back out of localStorage to display there.
Here's a jsfiddle to get you started setting and getting data.
https://jsfiddle.net/em92zbod/
The two main functions are:
window.localStorage.setItem("key", "value");
window.localStorage.getItem("key");
Where "key" is any identifier you want to use for the value.
Here's a suggested approach by using sessionStorage.
However, you can also use localStorage with the same implementation method. The only differences between them is localStorage will keep the data even if you close your browser. Which in this case, saving userName I think it's better to use sessionStorage.
1.html
<form action="2.html" onsubmit="callme()">
<p>Enter your name</p>
<input id="tbName" type="text">
<button type="submit" value="submit">Submit</button>
</form>
<script>
function callme(){
var name = document.getElementById('tbName').value;
sessionStorage.setItem('userName', name);
}
</script>
2.html
<h1 id="welcome"> </h1>
<script>
window.onload = function() {
document.getElementById('welcome').innerText = "Hello, " + sessionStorage.getItem('userName');
};
</script>
Code update
page 1
window.addEventListener("DOMContentLoaded", () => {
document.getElementById("myForm").addEventListener("submit", e => {
const form = e.target;
const name = document.getElementById('tbName').value;
sessionStorage.setItem('userName', name);
})
})
<form action="2.html" id="myForm">
<p>Enter your name</p>
<input id="tbName" type="text">
<button type="submit">Submit</button>
</form>
Page 2
window.addEventListener("DOMContentLoaded", () => {
document.getElementById('welcome').textContent = `Welcome ${ sessionStorage.getItem('userName') || "stranger"}`;
})
<h1 id="welcome"></h1>
Related
I have one simple html page with a text field that asks for user's name. i want to save what user enter and on another page i want to retrieve that name and say hello + (user's name).
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>LocalStorage</title>
</head>
<body>
<form>
<p>Enter your name</p>
<input type="text">
<button type="submit" value="submit">Submit</button>
</form>
</body>
</html>
and the second page is where the data from first page comes (through localStorage).
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>secondPage</title>
</head>
<body>
<h1>Hello </h1>
</body>
</html>
thank you.
I'm not sure if this is a homework assignment but this should get you started.
It will involve:
First storing the data into localStorage
Then directing the user over to the second page - most likely through window.location.href.
Then pulling the data back out of localStorage to display there.
Here's a jsfiddle to get you started setting and getting data.
https://jsfiddle.net/em92zbod/
The two main functions are:
window.localStorage.setItem("key", "value");
window.localStorage.getItem("key");
Where "key" is any identifier you want to use for the value.
Here's a suggested approach by using sessionStorage.
However, you can also use localStorage with the same implementation method. The only differences between them is localStorage will keep the data even if you close your browser. Which in this case, saving userName I think it's better to use sessionStorage.
1.html
<form action="2.html" onsubmit="callme()">
<p>Enter your name</p>
<input id="tbName" type="text">
<button type="submit" value="submit">Submit</button>
</form>
<script>
function callme(){
var name = document.getElementById('tbName').value;
sessionStorage.setItem('userName', name);
}
</script>
2.html
<h1 id="welcome"> </h1>
<script>
window.onload = function() {
document.getElementById('welcome').innerText = "Hello, " + sessionStorage.getItem('userName');
};
</script>
Code update
page 1
window.addEventListener("DOMContentLoaded", () => {
document.getElementById("myForm").addEventListener("submit", e => {
const form = e.target;
const name = document.getElementById('tbName').value;
sessionStorage.setItem('userName', name);
})
})
<form action="2.html" id="myForm">
<p>Enter your name</p>
<input id="tbName" type="text">
<button type="submit">Submit</button>
</form>
Page 2
window.addEventListener("DOMContentLoaded", () => {
document.getElementById('welcome').textContent = `Welcome ${ sessionStorage.getItem('userName') || "stranger"}`;
})
<h1 id="welcome"></h1>
This is my first page.
<!DOCTYPE html>
<html>
<head>
<title>Student List</title>
</head>
<body>
<h1>Customer Form</h1>
<form>
<div>
<label>Customer Name:</label>
<input type="text" autofocus id="name">
</div>
<br>
<div>
<label>Address:</label>
<input type="text" id="address">
</div>
<button type="button" onclick="myFunction()">Submit</button>
</form>
<!-- JavaScript -->
<script type="text/javascript" src="./javascript.js"></script>
</body>
</html>
This is my second page.
<!DOCTYPE html>
<html>
<head>
<title>Student List</title>
</head>
<body>
<p id="1"></p>
<!-- JavaScript -->
</body>
</html>
MY JAVASCRIPT
function myFunction() {
const xhttp = new XMLHttpRequest();
xhttp.onload = function(){
name = document.getElementById('name').value;
address = document.getElementById('address').value;
document.getElementById("1").innerHTML="<h1>alola="+name+"</h1>";
document.getElementById("2").innerHTML=address;
}
xhttp.open("GET", name);
xhttp.send();
}
I would like to display my name when typing my name from first page in the customer name label, and when i click submit. my second page display my name in the "id=1".
Ajax and ajax like techniques (fetch etc.) are usually used to either post data to a form or to get data from a url.
To send data from one HTML page to another you would need some kind of database and server side code to capture and store it and later retrive it.
If you just want inputed client side data to persist across pages then look at sessionStorage or localStorage, for example to keep the name we type until we exit the browser or clear session data:
First page:
<form>
<div>
<label>Customer Name:</label>
<input type="text" autofocus id="name">
</div>
<br>
<div>
<label>Address:</label>
<input type="text" id="address">
</div>
<button type="button" onclick="">Submit</button>
</form>
<script>
const name=document.getElementById('name')
name.addEventListener("keyup", (e) => {
sessionStorage.setItem('uname', name.value);
});
</script>
Second page:
<body>
<p id="usersName"></p>
<script>
let userNameElm = document.getElementById('usersName');
userNameElm.innerText = sessionStorage.getItem('uname');
</script>
</body>
Just remember to be careful what you store, and that it's only stored on the frontend/client side.
I was trying to use the example from here:
https://developer.mozilla.org/en-US/docs/Web/API/Document/forms
for my own uses.
The above example is accessing a form on the same page. My example attempts to populate a field on a different page.
Here is the launcher html - launcher.html:
<!DOCTYPE HTML>
<html>
<head>
<title>Launcher page</title>
<script>
function launch(text) {
window.open("http://localhost/page2.html", '_blank');
let entryform = window.document.forms.newentry;
entryform.elements.town.placeholder = text;
window.focus();
}
</script>
</head>
<body>
<p>Click button to launch page2 and populate edit box on form</p>
<button type="button" id="launcher" onclick="launch('Edinburgh')">populate a text field on a different page</button>
</body>
</html>
And the launched page - page2.html:
<!DOCTYPE html>
<html>
<head>
<title>Page 2</title>
</head>
<body>
<header>
<h1>This page launched from launcher.html</h1>
</header>
<main>
<form name="newentry">
<p>Town: </p><input type="text" name="town" value="">
</form>
</main>
</body>
</html>
But when I click the button on launcher.html I get an error on the launcher.html page:
entryform.elements.town.placeholder = text;
Uncaught TypeError: Cannot read property 'elements' of undefined
at launch (launcher.html:10)
at HTMLButtonElement.onclick (launcher.html:20)
Why is this elements property undefined?
How can I fix this?
EDIT
What I really wanted to do was simple, but the window.open object returned was not ready at the point I was attempting to edit. The really simple solution is like this:
function launch(text) {
let p2win = window.open('page2.html', '_blank');
p2win.onload = function(){
p2win.document.forms.newentry.town.value = text;
}
}
Your problem is that this code...
let entryform = window.document.forms.newentry;
is looking in the current window (ie launcher.html) for the form element. What you can do instead is save a reference to the popup window and access its elements via that reference.
let popup = window.open("http://localhost/page2.html", '_blank')
let entryform = popoup.document.forms.newentry
// and so on
As an alternative, I would consider passing a query parameter to the popup page instead of trying to manipulate it externally.
For example
window.open(`page2.html?placeholder=${encodeURIComponent(text)}`, '_blank')
and then in page2.html...
<main>
<form name="newentry">
<p>Town: </p><input type="text" name="town" value="">
</form>
</main>
<script>
let query = new URLSearchParams(location.search)
document.querySelector('form[name="newentry"] input[name="town"]')
.placeholder = query.get('placeholder')
</script>
Live demo ~ https://codesandbox.io/s/determined-archimedes-51vn2
I am currently writing a function that writes a bit of code for me based on an input. I am currently working on creating the input and the code that pastes the input, but whenever it writes, it shows up as undefined. This is the code.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Javascript YAML Generator</title>
</head>
<body>
<form class="yamlform" action="index.html" method="post">
<input type="text" name="appname" value="Name">
<button type="submit" onclick="writeAppName()">Submit</button>
</form>
<script type="text/javascript">
var appname = document.getElementsByName("appname").value
function writeAppName() {
document.write(appname)
}
</script>
</body>
</html>
NOTE: This is not my final version of the code, at the moment I just want a system for writing an input value that I can duplicate. Final version will be using document.getElementbyID.
document.getElementsByName returns colection. Use document.getElementsByName("appname")[0].value.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Javascript YAML Generator</title>
</head>
<body>
<form class="yamlform" action="index.html" method="post">
<input type="text" name="appname" value="Name">
<button type="submit" onclick="writeAppName()">Submit</button>
</form>
<script type="text/javascript">
var appname = document.getElementsByName("appname")[0].value
function writeAppName() {
document.write(appname)
}
</script>
</body>
</html>
You need to refer to the first element with name "appname", because it could be a collection. Also I but the assignment for appanme variable inside of the function, this will make it so appname isn't being assigned to "Name" right away and is instead assigned to whatever is in the text box when you click the botton
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Javascript YAML Generator</title>
</head>
<body>
<form class="yamlform" action="index.html" method="post">
<input type="text" name="appname" value="Name">
<button type="submit" onclick="writeAppName()">Submit</button>
</form>
<script type="text/javascript">
function writeAppName() {
var appname = document.getElementsByName("appname")[0].value
document.write(appname)
}
</script>
</body>
</html>
The problem is with your document.getElementsByName
It is possible that multiple elements would have same name.
While using document.getElementsByName, there might be multiple elements instead of a single element present in DOM with similar name, so document.getElementsByName returns an array (a list of elements) and not a single element
To use different elements of the Array, use
document.getElementsByName("appname")[0] // For first element with name
document.getElementsByName("appname")[1] // For second element with name
// and so on
So in your code, you would use
var appname = document.getElementsByName("appname")[0].value;
So this should be changing the page so that when they click the button it shows a total of everything they have selected in the form, but it is not doing anything. It seems that it is not even running the script at all, and I have no idea what is up.
...more form stuff up here
<button type="button" onclick="total(this.form)">Get my Total</button>
<p id="subtotal"></p>
<input type="submit">
</form>
<script>
function total(form)
{
var SynCr= form.Synth.value;
document.getElementById("subtotal").innerHTML="You have ordered: <br>"+SynCr+" Synth");
}
</script>
Your problem is onclick="total(this.form)". When the handler is called this refers to the button, which does not have a form as a member.
Try instead:
onclick="total(document.getElementById('formId'))"
First of all:
this.form does not return the parent form.
Second: you have a syntax error in: document.getElementById("subtotal").innerHTML="You have ordered: <br>"+SynCr+" Synth"); the last ) should not be there.
The following is sinppet of code shows you in some what how to debug your code and it works:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<form id="hgg">
<input type="text" name="Synth" value="" />
<button type="button" onclick="total(this)">Get my Total</button>
</form>
<div id="subtotal">
<p>5518</p>
</div>
<script>
function total(button)
{
form1 = button.parentNode;
alert(form1.Synth.value)
/*alert(p.id)
alert("555");*/
SynCr= form1.Synth.value;
alert(SynCr)
k = document.getElementById("subtotal");
k.innerHTML = "You have ordered: <br>"+SynCr+"Synth";
}
</script>
</body>
</html>
Look at this online demo: http://jsbin.com/voruzumi/1/