I'm begginer and I would like to build an event that started on change of input. The text entered in the input would be automatically formatted as follows:
The first letter must always be uppercase;
All other letters must be lowercase.
function formating() {
var nameOfPerson = document.getElementById("nameOfPerson").textContent;
var nameOfPerson = nameOfPerson[0].toUpperCase() + (nameOfPerson - nameOfPerson[0]);
document.getElementById("nameOfPerson").textContent = nameOfPerson;
}
<input type="text" id="nameOfPerson" onchange="formatting()" placeholder="type your name">
Try this:
function formatting() {
var nameOfPerson = this.value;
if (nameOfPerson.length > 0) {
nameOfPerson = nameOfPerson[0].toUpperCase() + nameOfPerson.substr(1).toLowerCase();
this.value = nameOfPerson;
}
}
<input type="text" id="nameOfPerson" onchange="formatting.call(this)" placeholder="type your name">
If you want to do this using CSS, then this is the tricks:
<input type="text" id="nameOfPerson" placeholder="type your name" style="text-transform: capitalize;">
CSS text-trasform property can change your input text as capitalize, lowercase and uppercase.
A simple way to achieve this is:
nameOfPerson.charAt(0).toUpperCase() + nameOfPerson.substring(1);
When to do it?
Blur
You can do it when input looses focus(blur) event. This will allow user to input in any format and when he is done, then you apply your formatting.
function formatting() {
var nameOfPerson = this.value
this.value = nameOfPerson.charAt(0).toUpperCase() + nameOfPerson.substring(1).toLowerCase();
}
var input = document.getElementById("nameOfPerson");
input.addEventListener('blur', formatting)
<input type="text" id="nameOfPerson" placeholder="type your name">
Input
Or you can enforce formatting using input event. This will take care of typing and pasting actions.
function formatting() {
var nameOfPerson = this.value
this.value = nameOfPerson.charAt(0).toUpperCase() + nameOfPerson.substring(1).toLowerCase();
}
var input = document.getElementById("nameOfPerson");
input.addEventListener('input', formatting)
<input type="text" id="nameOfPerson" placeholder="type your name">
Pointers
Avoid binding handlers in HTML. Anyone can change DOM using dev tools and change behaviour of your page.
textContent as name suggest is used for text bindings and will return static text. Inputs have value binding and you should use .value
When you use onclange="formatting()", handler will not have context pointing to element and you will have to fetch it again and again and DOM queries are expensive. Using .addEventListener() will bind context and is preferred as you can add more than 1 handler.
In (nameOfPerson - nameOfPerson[0]), - operator will convert value to numeric value and would yield NaN. When dealing with strings, use string helper functions.
Related
I am working on a search with JavaScript. I would use a form, but it messes up something else on my page. I have this input text field:
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
And this is my JavaScript code:
<script type="text/javascript">
function searchURL(){
window.location = "http://www.myurl.com/search/" + (input text value);
}
</script>
How do I get the value from the text field into JavaScript?
There are various methods to get an input textbox value directly (without wrapping the input element inside a form element):
Method 1
document.getElementById('textbox_id').value to get the value of
desired box
For example
document.getElementById("searchTxt").value;
Note: Method 2,3,4 and 6 returns a collection of elements, so use [whole_number] to get the desired occurrence. For the first element, use [0],
for the second one use [1], and so on...
Method 2
Use
document.getElementsByClassName('class_name')[whole_number].value which returns a Live HTMLCollection
For example
document.getElementsByClassName("searchField")[0].value; if this is the first textbox in your page.
Method 3
Use document.getElementsByTagName('tag_name')[whole_number].value which also returns a live HTMLCollection
For example
document.getElementsByTagName("input")[0].value;, if this is the first textbox in your page.
Method 4
document.getElementsByName('name')[whole_number].value which also >returns a live NodeList
For example
document.getElementsByName("searchTxt")[0].value; if this is the first textbox with name 'searchtext' in your page.
Method 5
Use the powerful document.querySelector('selector').value which uses a CSS selector to select the element
For example
document.querySelector('#searchTxt').value; selected by id
document.querySelector('.searchField').value; selected by class
document.querySelector('input').value; selected by tagname
document.querySelector('[name="searchTxt"]').value; selected by name
Method 6
document.querySelectorAll('selector')[whole_number].value which also uses a CSS selector to select elements, but it returns all elements with that selector as a static Nodelist.
For example
document.querySelectorAll('#searchTxt')[0].value; selected by id
document.querySelectorAll('.searchField')[0].value; selected by class
document.querySelectorAll('input')[0].value; selected by tagname
document.querySelectorAll('[name="searchTxt"]')[0].value; selected by name
Support
Browser
Method1
Method2
Method3
Method4
Method5/6
IE6
Y(Buggy)
N
Y
Y(Buggy)
N
IE7
Y(Buggy)
N
Y
Y(Buggy)
N
IE8
Y
N
Y
Y(Buggy)
Y
IE9
Y
Y
Y
Y(Buggy)
Y
IE10
Y
Y
Y
Y
Y
FF3.0
Y
Y
Y
Y
N IE=Internet Explorer
FF3.5/FF3.6
Y
Y
Y
Y
Y FF=Mozilla Firefox
FF4b1
Y
Y
Y
Y
Y GC=Google Chrome
GC4/GC5
Y
Y
Y
Y
Y Y=YES,N=NO
Safari4/Safari5
Y
Y
Y
Y
Y
Opera10.10/
Opera10.53/
Y
Y
Y
Y(Buggy)
Y
Opera10.60
Opera 12
Y
Y
Y
Y
Y
Useful links
To see the support of these methods with all the bugs including more details click here
Difference Between Static collections and Live collections click Here
Difference Between NodeList and HTMLCollection click Here
//creates a listener for when you press a key
window.onkeyup = keyup;
//creates a global Javascript variable
var inputTextValue;
function keyup(e) {
//setting your input text to the global Javascript Variable for every key press
inputTextValue = e.target.value;
//listens for you to press the ENTER key, at which point your web address will change to the one you have input in the search box
if (e.keyCode == 13) {
window.location = "http://www.myurl.com/search/" + inputTextValue;
}
}
See this functioning in codepen.
I would create a variable to store the input like this:
var input = document.getElementById("input_id").value;
And then I would just use the variable to add the input value to the string.
= "Your string" + input;
You should be able to type:
var input = document.getElementById("searchTxt");
function searchURL() {
window.location = "http://www.myurl.com/search/" + input.value;
}
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
I'm sure there are better ways to do this, but this one seems to work across all browsers, and it requires minimal understanding of JavaScript to make, improve, and edit.
Also you can, call by tags names, like this: form_name.input_name.value;
So you will have the specific value of determined input in a specific form.
Short
You can read value by searchTxt.value
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
<script type="text/javascript">
function searchURL(){
console.log(searchTxt.value);
// window.location = "http://www.myurl.com/search/" + searchTxt.value;
}
</script>
<!-- SHORT ugly test code -->
<button class="search" onclick="searchURL()">Search</button>
<input type="text" onkeyup="trackChange(this.value)" id="myInput">
<script>
function trackChange(value) {
window.open("http://www.google.com/search?output=search&q=" + value)
}
</script>
Tested in Chrome and Firefox:
Get value by element id:
<input type="text" maxlength="512" id="searchTxt" class="searchField"/>
<input type="button" value="Get Value" onclick="alert(searchTxt.value)">
Set value in form element:
<form name="calc" id="calculator">
<input type="text" name="input">
<input type="button" value="Set Value" onclick="calc.input.value='Set Value'">
</form>
https://jsfiddle.net/tuq79821/
Also have a look at a JavaScript calculator implementation.
From #bugwheels94: when using this method, be aware of this issue.
If your input is in a form and you want to get the value after submit you can do like:
<form onsubmit="submitLoginForm(event)">
<input type="text" name="name">
<input type="password" name="password">
<input type="submit" value="Login">
</form>
<script type="text/javascript">
function submitLoginForm(event){
event.preventDefault();
console.log(event.target['name'].value);
console.log(event.target['password'].value);
}
</script>
Benefit of this way: Example your page have 2 form for input sender and receiver information.
If you don't use form for get value then
You can set two different id (or tag or name ...) for each field like sender-name and receiver-name, sender-address and receiver-address, ...
If you set the same value for two inputs, then after getElementsByName (or getElementsByTagName ...) you need to remember 0 or 1 is sender or receiver. Later, if you change the order of 2 form in HTML, you need to check this code again
If you use form, then you can use name, address, ...
You can use onkeyup when you have more than one input field. Suppose you have four or input. Then
document.getElementById('something').value is annoying. We need to write four lines to fetch the value of an input field.
So, you can create a function that store value in object on keyup or keydown event.
Example:
<div class="container">
<div>
<label for="">Name</label>
<input type="text" name="fname" id="fname" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Age</label>
<input type="number" name="age" id="age" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Email</label>
<input type="text" name="email" id="email" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Mobile</label>
<input type="number" name="mobile" id="number" onkeyup=handleInput(this)>
</div>
<div>
<button onclick=submitData()>Submit</button>
</div>
</div>
JavaScript:
<script>
const data = { };
function handleInput(e){
data[e.name] = e.value;
}
function submitData(){
console.log(data.fname); // Get the first name from the object
console.log(data); // return object
}
</script>
function handleValueChange() {
var y = document.getElementById('textbox_id').value;
var x = document.getElementById('result');
x.innerHTML = y;
}
function changeTextarea() {
var a = document.getElementById('text-area').value;
var b = document.getElementById('text-area-result');
b.innerHTML = a;
}
input {
padding: 5px;
}
p {
white-space: pre;
}
<input type="text" id="textbox_id" placeholder="Enter string here..." oninput="handleValueChange()">
<p id="result"></p>
<textarea name="" id="text-area" cols="20" rows="5" oninput="changeTextarea()"></textarea>
<p id="text-area-result"></p>
<input id="new" >
<button onselect="myFunction()">it</button>
<script>
function myFunction() {
document.getElementById("new").value = "a";
}
</script>
One can use the form.elements to get all elements in a form. If an element has id it can be found with .namedItem("id"). Example:
var myForm = document.getElementById("form1");
var text = myForm.elements.namedItem("searchTxt").value;
var url = "http://www.myurl.com/search/" + text;
Source: w3schools
function searchURL() {
window.location = 'http://www.myurl.com/search/' + searchTxt.value
}
So basically searchTxt.value will return the value of the input field with id='searchTxt'.
Short Answer
You can get the value of text input field using JavaScript with this code: input_text_value = console.log(document.getElementById("searchTxt").value)
More info
textObject has a property of value you can set and get this property.
To set you can assign a new value:
document.getElementById("searchTxt").value = "new value"
Simple JavaScript:
function copytext(text) {
var textField = document.createElement('textarea');
textField.innerText = text;
document.body.appendChild(textField);
textField.select();
document.execCommand('copy');
textField.remove();
}
I am working on a search with JavaScript. I would use a form, but it messes up something else on my page. I have this input text field:
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
And this is my JavaScript code:
<script type="text/javascript">
function searchURL(){
window.location = "http://www.myurl.com/search/" + (input text value);
}
</script>
How do I get the value from the text field into JavaScript?
There are various methods to get an input textbox value directly (without wrapping the input element inside a form element):
Method 1
document.getElementById('textbox_id').value to get the value of
desired box
For example
document.getElementById("searchTxt").value;
Note: Method 2,3,4 and 6 returns a collection of elements, so use [whole_number] to get the desired occurrence. For the first element, use [0],
for the second one use [1], and so on...
Method 2
Use
document.getElementsByClassName('class_name')[whole_number].value which returns a Live HTMLCollection
For example
document.getElementsByClassName("searchField")[0].value; if this is the first textbox in your page.
Method 3
Use document.getElementsByTagName('tag_name')[whole_number].value which also returns a live HTMLCollection
For example
document.getElementsByTagName("input")[0].value;, if this is the first textbox in your page.
Method 4
document.getElementsByName('name')[whole_number].value which also >returns a live NodeList
For example
document.getElementsByName("searchTxt")[0].value; if this is the first textbox with name 'searchtext' in your page.
Method 5
Use the powerful document.querySelector('selector').value which uses a CSS selector to select the element
For example
document.querySelector('#searchTxt').value; selected by id
document.querySelector('.searchField').value; selected by class
document.querySelector('input').value; selected by tagname
document.querySelector('[name="searchTxt"]').value; selected by name
Method 6
document.querySelectorAll('selector')[whole_number].value which also uses a CSS selector to select elements, but it returns all elements with that selector as a static Nodelist.
For example
document.querySelectorAll('#searchTxt')[0].value; selected by id
document.querySelectorAll('.searchField')[0].value; selected by class
document.querySelectorAll('input')[0].value; selected by tagname
document.querySelectorAll('[name="searchTxt"]')[0].value; selected by name
Support
Browser
Method1
Method2
Method3
Method4
Method5/6
IE6
Y(Buggy)
N
Y
Y(Buggy)
N
IE7
Y(Buggy)
N
Y
Y(Buggy)
N
IE8
Y
N
Y
Y(Buggy)
Y
IE9
Y
Y
Y
Y(Buggy)
Y
IE10
Y
Y
Y
Y
Y
FF3.0
Y
Y
Y
Y
N IE=Internet Explorer
FF3.5/FF3.6
Y
Y
Y
Y
Y FF=Mozilla Firefox
FF4b1
Y
Y
Y
Y
Y GC=Google Chrome
GC4/GC5
Y
Y
Y
Y
Y Y=YES,N=NO
Safari4/Safari5
Y
Y
Y
Y
Y
Opera10.10/
Opera10.53/
Y
Y
Y
Y(Buggy)
Y
Opera10.60
Opera 12
Y
Y
Y
Y
Y
Useful links
To see the support of these methods with all the bugs including more details click here
Difference Between Static collections and Live collections click Here
Difference Between NodeList and HTMLCollection click Here
//creates a listener for when you press a key
window.onkeyup = keyup;
//creates a global Javascript variable
var inputTextValue;
function keyup(e) {
//setting your input text to the global Javascript Variable for every key press
inputTextValue = e.target.value;
//listens for you to press the ENTER key, at which point your web address will change to the one you have input in the search box
if (e.keyCode == 13) {
window.location = "http://www.myurl.com/search/" + inputTextValue;
}
}
See this functioning in codepen.
I would create a variable to store the input like this:
var input = document.getElementById("input_id").value;
And then I would just use the variable to add the input value to the string.
= "Your string" + input;
You should be able to type:
var input = document.getElementById("searchTxt");
function searchURL() {
window.location = "http://www.myurl.com/search/" + input.value;
}
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
I'm sure there are better ways to do this, but this one seems to work across all browsers, and it requires minimal understanding of JavaScript to make, improve, and edit.
Also you can, call by tags names, like this: form_name.input_name.value;
So you will have the specific value of determined input in a specific form.
Short
You can read value by searchTxt.value
<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>
<script type="text/javascript">
function searchURL(){
console.log(searchTxt.value);
// window.location = "http://www.myurl.com/search/" + searchTxt.value;
}
</script>
<!-- SHORT ugly test code -->
<button class="search" onclick="searchURL()">Search</button>
<input type="text" onkeyup="trackChange(this.value)" id="myInput">
<script>
function trackChange(value) {
window.open("http://www.google.com/search?output=search&q=" + value)
}
</script>
Tested in Chrome and Firefox:
Get value by element id:
<input type="text" maxlength="512" id="searchTxt" class="searchField"/>
<input type="button" value="Get Value" onclick="alert(searchTxt.value)">
Set value in form element:
<form name="calc" id="calculator">
<input type="text" name="input">
<input type="button" value="Set Value" onclick="calc.input.value='Set Value'">
</form>
https://jsfiddle.net/tuq79821/
Also have a look at a JavaScript calculator implementation.
From #bugwheels94: when using this method, be aware of this issue.
If your input is in a form and you want to get the value after submit you can do like:
<form onsubmit="submitLoginForm(event)">
<input type="text" name="name">
<input type="password" name="password">
<input type="submit" value="Login">
</form>
<script type="text/javascript">
function submitLoginForm(event){
event.preventDefault();
console.log(event.target['name'].value);
console.log(event.target['password'].value);
}
</script>
Benefit of this way: Example your page have 2 form for input sender and receiver information.
If you don't use form for get value then
You can set two different id (or tag or name ...) for each field like sender-name and receiver-name, sender-address and receiver-address, ...
If you set the same value for two inputs, then after getElementsByName (or getElementsByTagName ...) you need to remember 0 or 1 is sender or receiver. Later, if you change the order of 2 form in HTML, you need to check this code again
If you use form, then you can use name, address, ...
You can use onkeyup when you have more than one input field. Suppose you have four or input. Then
document.getElementById('something').value is annoying. We need to write four lines to fetch the value of an input field.
So, you can create a function that store value in object on keyup or keydown event.
Example:
<div class="container">
<div>
<label for="">Name</label>
<input type="text" name="fname" id="fname" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Age</label>
<input type="number" name="age" id="age" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Email</label>
<input type="text" name="email" id="email" onkeyup=handleInput(this)>
</div>
<div>
<label for="">Mobile</label>
<input type="number" name="mobile" id="number" onkeyup=handleInput(this)>
</div>
<div>
<button onclick=submitData()>Submit</button>
</div>
</div>
JavaScript:
<script>
const data = { };
function handleInput(e){
data[e.name] = e.value;
}
function submitData(){
console.log(data.fname); // Get the first name from the object
console.log(data); // return object
}
</script>
function handleValueChange() {
var y = document.getElementById('textbox_id').value;
var x = document.getElementById('result');
x.innerHTML = y;
}
function changeTextarea() {
var a = document.getElementById('text-area').value;
var b = document.getElementById('text-area-result');
b.innerHTML = a;
}
input {
padding: 5px;
}
p {
white-space: pre;
}
<input type="text" id="textbox_id" placeholder="Enter string here..." oninput="handleValueChange()">
<p id="result"></p>
<textarea name="" id="text-area" cols="20" rows="5" oninput="changeTextarea()"></textarea>
<p id="text-area-result"></p>
<input id="new" >
<button onselect="myFunction()">it</button>
<script>
function myFunction() {
document.getElementById("new").value = "a";
}
</script>
One can use the form.elements to get all elements in a form. If an element has id it can be found with .namedItem("id"). Example:
var myForm = document.getElementById("form1");
var text = myForm.elements.namedItem("searchTxt").value;
var url = "http://www.myurl.com/search/" + text;
Source: w3schools
function searchURL() {
window.location = 'http://www.myurl.com/search/' + searchTxt.value
}
So basically searchTxt.value will return the value of the input field with id='searchTxt'.
Short Answer
You can get the value of text input field using JavaScript with this code: input_text_value = console.log(document.getElementById("searchTxt").value)
More info
textObject has a property of value you can set and get this property.
To set you can assign a new value:
document.getElementById("searchTxt").value = "new value"
Simple JavaScript:
function copytext(text) {
var textField = document.createElement('textarea');
textField.innerText = text;
document.body.appendChild(textField);
textField.select();
document.execCommand('copy');
textField.remove();
}
I want to replace all my non numeric characters with an empty string. I found this solution
I am trying to replace the value of an input element on change. But when I use above, it is not replacing until I press a number.
Each non-digit I type stays until I type a digit
Ex: 2aaaaa will not be replaced. But as soon as 2aaaa3 is typed it will replace all the a's and it becomes 23
Is this the normal behaviour? How can I achieve my requirement.
component.ts
mobileChanged = () => {
this.mobile = this.mobile.replace(/\D/g,'');
};
angular component.html
<input type="text" [(ngModel)]="mobile" (ngModelChange)="mobileChanged()">
You can use keyup from jQuery or onkeyup from Javascript.
$("document").ready(function() {
$("input").keyup(function() {
let v = this.value.replace(/\D/g, '');
this.value = v;
})
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" value="" />
Yes, it's the usual behaviour for ngModelChange but seems you need onkeyup event here to replace Non-digits. Something like-
function mobileChanged() {
var txtinput = document.getElementById("fname");
var x = txtinput.value.replace(/\D/g,'');
txtinput.value = x;
}
<input id ="fname" type='text' onkeyup="mobileChanged()">
See if you still have confusion: https://stackoverflow.com/a/46403258/1138192
For example, if I have a form and I don't want the user to enter numbers in it and I validate it with a function containing a regular expression, how do I prevent the invalid character the user entered (in this example, a digit) from showing up in the text form if it fails the regular expression test?
This is the function I tried and the select list I tried it on (in other words, this isn't the whole program). I tried returning false to the onkeypress event handler but what the user enters into the textbox still goes through.
function noNumbers(answer) { //returns false and displays an alert if the answer contains numbers
if (/[\d]+/.test(answer)) { // if there are numbers
window.alert("You can not enter numbers in this field");
return false;
}
}
<form action="get" enctype="application/x-www-form-urlencoded">
<select id="questions" name="questions">
<option value="no_numbers">What is the name of the city where you were born?</option>
<option value="no_letters">What is your phone number?</option>
<option value="no_numbers">What is the name of your favorite pet?</option>
<option value="no_letters">What is your social security number?</option>
<option value="no_numbers">What is your mother's maiden name?</option>
</select>
<p><input type="text" name="answer" onkeypress="validateAnswer();" /></p>
</form>
This validation works great for stripping invalid characters on the fly as you enter them in the relevant field. Example:
<form id="form1" name="form1" method="post">
Email:
<input type="text" name="email" id="email" onkeyup='res(this, emailaddr);' ; </form>
<script>
var phone = "()-+ 0123456789";
var numb = "0123456789";
var alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ #-'.,";
var alphanumb = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ #-.'1234567890!?,:;£$%&*()";
var alphaname = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ ,-.1234567890";
var emailaddr = "0123456789#._abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
function res(t, v) {
var w = "";
for (i = 0; i < t.value.length; i++) {
x = t.value.charAt(i);
if (v.indexOf(x, 0) != -1)
w += x;
}
t.value = w;
}
</script>
Then you would simply change the second value of the javascript call to the type of data you want entered in the field using the variables that are defined within the code.
This is the function you are looking for
function validateAnswer(src) {
var questions = document.getElementById("questions");
var rule = questions.options[questions.selectedIndex].value;
if(rule=="no_numbers") src.value = src.value.replace(/\d/g, '');
if(rule=="no_letters") src.value = src.value.replace(/\w/g, '');
}
just send the input field reference to the function and set it to onkeyup event instead:
<input type="text" name="answer" onkeyup="validateAnswer(this);" />
you should also hook the onchange event of the selectbox to reset the value of the input box. I suggest you also consider the HTML5 pattern attribute. See
the fiddle
patern attribute support
workaround for unsupported browsers
You get the key being pressed from the event object passed to the handler.
input type="text" name="answer" onkeypress="validateAnswer(this, event);" />
function validateAnswer(element, event) {
if (event.charCode) {
if (/\d/.test(String.fromCharCode(event.charCode))) {
window.alert("You can not enter numbers in this field");
return false;
}
}
}
Googling for "onkeypress event" finds many examples of this.
Make your life simpler by adding an extra parameter to your validateAnswer function like this:
<input type="text" id="answer" name="answer" onkeyup="validateAnswer(this);" />
Then you can define your validateAnswer like this:
function validateAnswer(elem){
elem.value = elem.value.replace(/[^\d]/g, '');
}
Here an example: http://jsbin.com/iwiduq/1/
First name: <input type="text" name="firstname"></input>
<input type="submit" value="Submit" />
Let's say I have the simple form above. How would I grab what the user inputted in the First Name field in JS. I tried:
document.getElementsByTagName("input")[1].onclick = function() {
inputted = document.getElementsByTagName("input")[0].innerHTML;
}
But that doesn't work. How would I do this?
Use value for text inputs:
inputted = document.getElementsByTagName("input")[0].value;
Also make sure to add var keyword to your variables so that you don't create a global variable:
var inputted = document.getElementsByTagName("input")[0].value;
You should also not put closing </input> tag since it is self-closing tag:
<input type="text" name="firstname" />
By the way you can also get elements value using below syntax:
formName.elementName.value;
Or
document.forms['formName'].elementName.value;
In your case it would be:
var inputted = formName.firstname.value;
Or
var inputted = document.forms['formName'].firstname.value;
Replace formName with whatever name is of your <form> element.
Lastly you can also get element's value if you apply id to it:
<input type="text" name="firstname" id="firstname" />
and then use getElementById:
var inputted = document.getElementById('firstname');
var inputs=document.getElementsByTagName("input"),
i=inputs.length;
//
while(i--){
inputs[i].onclick=myClickEventHandler;
};
//
function myClickEventHandler(evt){
var myVal;
switch (this.name) {
case 'firstname':
myVal = this.value;
break;
};
};
If you are using a form, you could try something like this instead :
var input = document.forms["formName"]["fieldName"].value;
Else, make use of the .value attribute :
var input = document.getElementsByTagName("input")[0].value;