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VisualizaçõesDisable and enable button by over or under age 18 Javascript
Im new to JavaScript.
I struggled to find solution of enable and disable button using by if statement of under and over age 18, first click vote button was enable when I insert number 10 on textbox then disable button is stuck and cant change to enable after change the number of over age 18.
//age verification
if(Age < 18)
{
document.getElementById('age').style.borderColor='#e52213';
document.getElementById("Btn").disabled = true;
}
if(Age > 18)
{
document.getElementById("Btn").disabled = disabled;
}
Check image of vote button stuck on webpage at below:
2 Respostas
Responde à pergunta0
You can assign false to the disabled attribute. Also, as your code stands, you can omit the condition simply using the else block.
Demo:
var ageEl = document.getElementById('age');
manageBtn(ageEl);
ageEl.addEventListener('input', function(){manageBtn(ageEl);});
function manageBtn(el){
var age = ageEl.value;
if(age < 18){
document.getElementById('age').style.borderColor='#e52213';
document.getElementById("Btn").disabled = true;
}
else{
document.getElementById('age').style.borderColor='';
document.getElementById("Btn").disabled = false;
}
}<input type="number" id="age">
<button id ="Btn">My Button</button>0
The disabled property is a Boolean so something like
btn = document.getElementById("Btn")
if(Age <= 18)
{
document.getElementById('age').style.borderColor='#e52213';
btn.disabled = true;
}
else if(Age > 18)
{
btn.disabled = false;
}
also a couple of other things, you should use else if instead of another if so you don't check for something you already know is false,
use <= for the case where the age is 18
and also probably better imo to save the btn to a variable so you dont fetch the element twice.