Task at hand:
Hide the 'level' input when the 'object' value is 0.
Current situation:
input type="text" id="level"
input type="text" id="object"
My attempt:
var lvl = document.getElementById("level")
var ogg = document.getElementById("object")
if (ogg == 0) {
lvl.style.display = 'none';
};
I am struggling to get this code to work as I am new to JavaScript. Any assistance would be greatly appreciated, thank you!
ogg represents an HTML element that requires the value property of ogg to access the value of the input.
if ( ogg.value == 0) {
lvl.style.display = 'none';
};
If you need to check if the value is null or empty:
if (!ogg.value && ogg.value.trim() == "") {
lvl.style.display = 'none';
};
To retrieve the input field's value, utilize the .value attribute as demonstrated below:
if (ogg.value == 0) {
lvl.style.display = 'none';
};
Obtain the element by using var ogg = document.getElementById("object")To retrieve the value of the input element, simply use ogg.value.
Additionally,
You will receive the value as a string from the input element.
If you expect the input to be an integer or number, it is recommended to parse it into an int like this:
var value = parseInt(ogg.value)
You can now use this parsed value in conditional statements like so:
if(value === 0)
Follow these steps:
let value = document.getElementById("object").value;
The .value attribute allows you to retrieve the text value of the HTML element. Do you have any other inquiries?
For more details:Check here
Furthermore, you can modify the text value of an element using .value
document.getElementById("myOption").value = "newText";
To properly validate the value of object, you need to use the keyup event. Here is a functional example:
var level = document.getElementById("level");
var object = document.getElementById("object");
function checkValue(){
if (parseInt(object.value) === 0) {
level.style.display = 'none';
}
else {
level.style.display = 'block';
}
}<input type="text" id="level" placeholder="Level">
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