how would I get a textbox perform a function if a specific word is submitted. I have a robot that jumps on mousedown and I want it to jump if I write jump or write move in the textbox it does the move function. I tried few things but couldnt get it to work
Heres the code
<form id="formDiv" action="" >
Command the robot!: <input type="text" size="50" onkeydown="keyCode(event)">
</form>
<div id="canvasDiv" width="500" height="10"></div>
<script type="text/javascript" src="robotti.js"></script>
<script type="text/javascript">
prepareCanvas(document.getElementById("canvasDiv"), 500, 500);
document.getElementById("canvasDiv").onmousedown = function() {
jump(); }
//document.getElementById("canvasDiv").onkeypress = function() {
//move(); }
document.getElementById("canvasDiv").window.onkeypress = function(event) {
if (event.keyCode == 41) {
move();
}
}
</script>
This should work -:
var text = getElementById("canvasDiv").value;
if(text.includes("move") || text.includes("jump")){
jump();
getElementById("canvasDiv").value = "";
}
Please use onkeyup instead of onkeydown
<!DOCTYPE html>
<html>
<body>
<input type="text" id="canvasDiv" onkeyup="keyCode()" value="">
<script>
function keyCode(e) {
var text = (document.getElementById("canvasDiv").value).toLowerCase();
if(text == 'jump' || text == 'move'){
//call jump function here
alert("jump");
}
}
</script>
</body>
</html>
You shouldn't use HTML attributes like onkeydown etc. Use an EventListener instead. Register one on your input field, grab its value and check (either via switch or if...else) what the user entered. According to the user's input, execute your functions.
document.querySelector('input[type="text"]').addEventListener('keyup', function() {
switch (this.value) {
case 'move':
console.log('move!'); // Your actual function here
this.value = ''; // Reset value
break;
case 'jump':
console.log('jump!'); // Your actual function here
this.value = '' // Reset value
break;
}
});
Command the robot!: <input type="text" size="50">
Further reading:
Why is inline event handler attributes a bad idea in modern semantic HTML?
document.querySelector
Related
pretty new to coding. But I have a small assignment where I just not get what function I should do or how I should write it down. Basicly it should give an input box and a button (this works). But now I want to give an alert IF the input is hi and a different alert if the input is bye. For all other inputs there shouldn't happen anything. I'm just not getting it, can someone help out?
<h1>Welcome</h1>
Input: <input id="welcome1" type="text" />
<button id="button">Click here</button>
</body>
<script type="text/javascript">
if (document.getElementById("welcome1").textContent = "hi"){
document.getElementById("button").onclick = alert("Welcome");
}
else (document.getElementById("welcome1").textContent = "bye"){
document.getElementById("button").onclick = alert("See you later");
}
</script>
You should add an event listener to the button, but first you should identify it.
To identify it, you have to use document.getElementById("the_id"). Keep in mind that we have other ways to find the element, in other words, we have many selectors (id, class, tag name, etc.).
And when you use an else statement, you do not specify another condition. To specify other condition you have to use else if, because else is for anything that was not in the if or an else if.
<h1>Welcome</h1>
Input: <input id="welcome1" type="text" />
<button id="button">Click here</button>
<script type="text/javascript">
const btn = document.getElementById("button")
btn.addEventListener("click", function() {
if (document.getElementById("welcome1").value === "hi") {
alert("Welcome");
} else {
alert("See you later");
}
})
</script>
Welcome
Input: <input id="welcome1" type="text" >
<button id="button">Click here</button>
<script type="text/javascript">
// add eventListener to the element
document.querySelector("#button").addEventListener("click", handleButton, false)
// function handle to check
function handleButton () {
// get the value from the input
// use querySelector instead of getElementById
const inputText = document.querySelector("#welcome1").value;
// check if is the same string and the same type (string)
if(inputText === "hi") {
alert ("Welcome");
} else i f(inputText == "bye") {
alert("See you later");
}
}
So I have this working codeblock in my script to replace the decimal seperator from comma "," into period "." ,when editing a form. Because in this region the decimal seperator comma is normal I also want the values to be displayed like this 1,99€ so I reverted the working function. The selected fields should change on load. When the form gets submitted I will cange it back again. For this example I show you only one of the fields.
The value="1.5" gets loaded from the Magento-Backend the wrong way, which is another story:
I included onload:"function(event)"
and window.onload = function(); to show two my attempts to adress this function from jQuery: jQuery('form').on('change', '#price', function(event) I also need to know how to remove the .on('change' part. First time using Js und jQuery. I really tried everything.
<html>
<body onload="function(event)">
<form>
<input id="price" value="1.5">
</form>
</body>
</html>
<script>
window.onload = function();
jQuery('form').on('change', '#price', function(event) {
event.preventDefault();
if (jQuery('#price').val().includes('.')) {
var varwithpoint = jQuery('#price').val();
varwithcomma = varwithcomma.replace(",",".");
jQuery('#price').val(varwithpoint);
}
else {
console.log('no dot to replace');
}
});
</script>
There were a few parts of the code which didn't seem to be working as intended, so below is a basic example of code that will convert the "," to a "." if stored in the input "price", and check this after each change of the value;
function convert_price(){
var this_price = $("#price").val();
if (this_price.includes(',')) {
this_price = this_price.replace(",",".");
$('#price').val(this_price);
} else {
console.dir('no dot to replace');
}
}
convert_price();
$("#price").on("change",convert_price);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<html>
<body>
<form>
<input id="price" value="1,5">
</form>
</body>
</html>
I have called "init" the function that attaches the change event to the input file, I also changed the parameters passed to the on function
function init(){
var input = jQuery('#price');
input.on('change', function(event) {
event.preventDefault();
var valueInInput = input.val();
if (valueInInput.includes('.')) {
var varwithcomma = valueInInput.replace(",",".");
input.val(varwithcomma);
} else {
console.log('no dot to replace');
}
});
}
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body onload="init()">
<form>
<input id="price" value="1.5">
</form>
</body>
</html>
I'm trying to create a function that takes a users input and if it equals 10 then perform a function that will eventually print fizzbuzz to the screen from 0-10 but for now I'm just trying to get it to say "awesome" if the input == 10. Here is the code.
<!DOCTYPE html>
<html>
<head>
<title>Fizzbuzz Input Field</title>
<script src="scripts.js"></script>
</head>
<body>
<form>
<input type="number" id="userInput"></input>
<button onclick="fizzBuzz()">Go</button>
</form>
</body>
</html>
window.onload = function() {
alert("Page is loaded");
};
var fizzBuzz = function() {
var userInput = document.getElementById("userInput");
fizzBuzz.onclick = function() {
if(userInput.value == 10) {
document.write("awesome");
};
};
}
Grab the element from the input, in this case, "userInput". grab your button by querying it, or putting an id on it etc... Don't bother with putting a function on the HTML, avoid bad practice. Add an event listener to the button, check to see if it equals 10 and append your text, preferably somewhere suitable.
var input = document.getElementById("userInput");
var button = document.getElementsByTagName('button')[0]
button.addEventListener('click', function(a) {
if (input.value === '10') {
button.after("awesome");
}
})
<input type="number" id="userInput">
<button>Go</button>
I think what you are looking for is eval before using it, you should search the web for why eval is evil.
What you want is something like this:
var button = document.getElementById('myButton');
button.addEventListener('click', function(e) {
// First we get the numeric value written to the input (or NaN if it's not a number)
var inputValue = parseInt(document.getElementById('userInput').value, 10);
// Define the element to which write the text (you usually want a DIV for this)
var outputElement = document.getElementById('outputDiv');
if ( ! isNaN(inputValue) ) {
outputElement.innerHTML = "awesome!";
}
else {
// The value is not a number, so just clean the result
outputElement.innerHTML = "";
}
});
Of course, for this to work, you should have at least:
<input type="number" id="userInput" />
<button id="myButton">Go</button>
<div id="outputDiv"></div>
I don't have any idea how you want the awesome to be displayed. Made it an alert. Have fun.
<script>
function fizzBuzz() {
var fizzBuzz = document.getElementById("userInput").value;
if(fizzBuzz != 10){
alert('Number is not equal to ten!');
}else {
alert('awesome');
}
}
</script>
You are setting a property 'onclick' of function 'fizzBuzz',
you should use the input event.
var userInput = document.getElementById('userInput');
userInput.oninput = function() {
if( this.value == 10 ) alert('awesome');
}
I need to take the value from an input box and write it below the input box on the click of a button. I thought to use a label but if there is another way I am open to suggestions.
My code so far:
<h1>Test</h1>
<form name="greeting">
Type your name here: <input type = "Text" name="fullname" id="name"> <button onclick="getName()">Create</button><br>
Hello <label id="greet">Hello</label>
</form>
<script lang="javascript">
function getName() {
var inputVal = document.getElementById("name").value;
if (inputVal == "") {
document.getElementById("name").style.backgroundColor = "red";
}
else {
document.write("Hello " + document.getElementById("name"));
}
First of all, you don't want to submit a form, so change button type from "submit" (default) to "button".
Then you should not use document.write almost never, it's used in very specific cases. Use proper DOM manipulation methods like appendChild. I would use convenient insertAdjacentHTML:
function getName() {
var input = document.getElementById("name");
if (input.value == "") {
input.style.backgroundColor = "red";
} else {
input.insertAdjacentHTML('afterend', '<div>' + input.value + '</div>');
}
}
<form name="greeting">Type your name here:
<input type="Text" name="fullname" id="name" />
<button type="button" onclick="getName()">Create</button>
<br>Hello
<label id="greet">Hello</label>
</form>
First you need to stop your form from submitting. Second you should not use document.write, since it will not append the text as wanted after the input field. And last you need to validate the elements value and not the element itself.
<html>
<head>
<script>
//First put the function in the head.
function getName(){
var input = document.getElementById("name");
input.style.backgroundColor = ''; //Reseting the backgroundcolor
if (input.value == ''){ //Add the.value
input.style.backgroundColor = 'red';
}
else{
//document.write('Hello ' + input.value); //This would overwrite the whole document, removing your dom.
//Instead we write it in your greeting field.
var tE = document.getElementById('greet');
tE.innerHTML = input.value;
}
return false //Prevent the form from being submitted.
}
</script>
</head>
<body>
<h1>Test</h1>
<form name = 'greeting'>
Type your name here: <input type = "Text" name="fullname" id="name"> <button onclick="return getName()">Create</button><br>
Hello <label id="greet">Hello</label>
</form>
</body>
</html>
You need to cancel the submit event which makes the form submit, alternatively you could not wrap everything inside a form element and just use normal div that way submit button wont submit.
Demo : https://jsfiddle.net/bypr0z5a/
Note reason i attach event handler in javascript and note onclick attribute on button element is because jsfiddle works weird, on ordinary page your way of calling getName() would have worked.
byId('subBtn').onclick = function (e) {
e.preventDefault();
var i = byId('name'),
inputVal = i.value;
if (inputVal == "") {
i.style.backgroundColor = "red";
} else {
byId('greet').innerText = inputVal;
i.style.backgroundColor = "#fff";
}
}
function byId(x) {
return document.getElementById(x);
}
I have been trying to get this to work. Basically I have a search box that has a default string in it (i.e. Search) and it should go away when the user clicks on the input field.
Here is the code:
HTML:
<form method="get" action="index.php" id="search">
<span id="searchLogo"></span>
<input type='text' name='q' id='searchBox' value="Search <?php print $row[0]?> tweets!" autocomplete="off" />
</form>
Javascript/jQuery: (defaultString is a global variable that has the value of the textbox)
function clearDefault() {
var element = $('#searchBox');
if(element.attr('value') == defaultString) {
element.attr('value',"");
}
element.css('color','black');
}
$('#searchBox').focus(function() {
clearDefault();
});
Problem is here:
if(element.attr('value') == defaultString) {
element.attr('value',"");
}
Change it with:
if(element.val() == defaultString) {
element.val('value');
}
Update: Check it here:
http://jsfiddle.net/mr3T3/2/
The problem was that the event binding was not inside the $(document).ready() handler.
Fixed:
function clearDefault() {
var element = $('#searchBox');
if(element.val() == defaultString) {
element.val("");
}
element.css('color','black');
}
$(document).ready(function() {
$('#searchBox').focus(function() {
clearDefault();
});
});
It could be that event in fact is firing and your problem is in
if(element.attr('value') == defaultString) {
element.attr('value',"");
}
is "defaultString" properly defined?
put a simple alert() inside clearDefaults() and see if the event works.
i don't think clearDefault is reusable function, so don't create unnecessary function for small block of code. See the following code sample, i added a small improvement in your functionality.
<form method="get" action="index.php" id="search">
<span id="searchLogo"></span>
<input type='text' name='q' id='searchBox' default="Search tweets!" value="Search tweets!" autocomplete="off" />
</form>
$(document).ready(function() {
$("#searchBox").focus(function(e){
var $this = $(this);
if($this.val() == $this.attr('default')) $this.val('');
else if($this.val().length == 0 ) $this.val($this.attr('default'));
});
$("#searchBox").blur(function(e){
var $this = $(this);
if($this.val().length == 0 ) $this.val($this.attr('default'));
});
});
I added a default attribute to store default value and used it later on blur event.
See the example in jsFiddler