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I'm studying for an exam and I'm doing some sample problems by myself. I've ran into the Uncaught TypeError: document.getElementByID is not a function problem.
Here is my code:
<script>
function checkValidity(){
//Create variable to check for errors
var input = document.getElementByID('myID').value;
if(input < 0){
document.getElementByID('errorCheck').textContent = 'The value must be a positive integer';
}else if(ifNaN(input)){
document.getElementByID('errorCheck').textContent = 'Not a number. The value must be a positive integer.';
}else if(input == null){
document.getElementByID('errorCheck').textContent = 'Please input a value.';
} else{
document.getElementByID('errorCheck').textContent = 'Valid number.';
}
}
document.getElementByID('validateid').onclick = checkValidity;
It yells at me at this line of code saying it is invalid.
document.getElementByID('validateid').onclick = checkValidity;
I know its a small mistake. I'd appreciate if someone pointed it out.
You're looking for document.getElementById, lowercase d.
Looks like a typo. You need to do:
document.getElementById('errorCheck')
with lowercase 'd'. Here is a reference link.
Related
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Closed 1 year ago.
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I have a JS function which checks if a user entered string is zero.
if (str.legth = 0) {
alert('Provide at least 1 character to create a folder.');
return;
}
But this seems to let a user pass a zero entered string.
Is there anything missing?
THanks
You've misspelled "length" and you need "==" instead of "=" to check for equailty rather than assigning a value.
If your variable is called str, then length is used to return a boolean value. You need to use either == or === for an actual comparison instead of an assignment. Additionally, a return isn't necessary.
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Closed 2 years ago.
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I wanted to compare the value of variable which is getting the URL of current page with the hard coded string. Though the values are same I am getting false in the comparison. Not able to guess what is happening. Below is the code:
var loc = String('"' + window.URL + '"');
if("Here I am specifying entire URL manually exactly same which I am getting in loc"==String(loc))
{ console.log("true") }
else { console.log("false") }
This is pretty simple but I am missing something. Help needed. Thanks in advance.
You should use window.location.href instead . Since loc variable returns "function URL() { [native code] }" Hence the result is false.
window.location.href === "<Your string>"
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Closed 6 years ago.
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I'm creating a site and i needed to do some js. I'm not that good with it but tought i would figer it out. Not. I created a for loop but it does not run.
function order(user,product){
var index;
for(var i = 0; i<users.lenght; i++){
if(user == users[i]){
index = i;
break;
}
}
var budget = budgets[index];
alert(budget);
}
the creation of the users and budgets arrays are done with php and after checking with alert() it was how it should be.
Can anyone help me please?
lenght is spelt length. The misspelt property does not exist, so it undefined, which is equivalent to 0.
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So, me and a few friends are making a text adventure in JavaScript. in it, there is a possibility of the player using a heal spell, which runs the following code:
function heal() {
alert('You chant some ominous-sounding words, and your wounds heal');
alert('Hit points restored!');
hitPoints += 60;
blobsOfDoom -= 30;
burn();
MonsAtt();
Choose Spell();
}
Error Messages:
Firefox:
/*
Exception: SyntaxError: missing ; before statement
#Scratchpad/1:2703
*/
Chrome:
SyntaxError: Unexpected identifier.
Why is this error showing up? How do I fix it?
You cant have spaces in functions
Choose Spell();
Check your function declaration for ChooseSpell and any other occurances, and change them to a valid function name, like chooseSpell()
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Closed 7 years ago.
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In JavaScript code I use regular expression match() function to find pattern and show the result, but it does not give a proper answer, means finding [i] character in giving sentences
<button onclick = "searchPattern()">pattern</button><br>
<p id = "demo"></p>
<script>
function searchPattern(){
var str = "Visti W3Schools!";
var paat = /[i]/g;
var result = str.match(patt);
document.getElementById("demo").innerHTML = result;
}
</script>
Read your JavaScript console
Uncaught ReferenceError: patt is not defined
You changed your variable name from paat to patt half way through your code.