//getting DOM elements//
let firstName=document.getElementById('firstName').value;
let secondName=document.getElementById('secondName').value;
let loveResulat=document.getElementById('love');
let btn=document.getElementById('btn');
// love calculator functionality//
//1. get random number//
function getrandom(maxLimit = 99) {
let rand = Math.random() * maxLimit;
return Math.floor(rand);
}
//2.form validation//
firstName.addEventListener('submit',validation);
secondName.addEventListener('submit',validation);
function validation(){
'use strict';
e.preventdefault();
if(firstName==''){
console.log('Please enter your firstName')
}
else if(firstName.length<=3){
alert('the min is 2 items')
}
else if(!NaN(firstName)){
alert('number not allowed');
}
if(secondName==''){
console.log('please enter your name')
}
else if(secondName.length<=3){
alert('the min is 2')
}
else if(!NaN(secondName)){
alert('number are not allowed')
}
}
validation();
Could you describe your problem? What is happening? What should be happening? What troubleshooting have you tried?
I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>
) to add backticks around text.
See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).
the problem is that i can’t attach addEventListener to firstName element , it show me this error in the console : Uncaught TypeError: firstName.addEventListener is not a function
It’s telling you that firstName
is not an element and thus you cannot use the addEventListener method on it. Look at where you are declaring firstName
:
let firstName=document.getElementById('firstName').value;
What is the value of firstName
after this? What is its type?
You are using this variable correctly in the following:
if(firstName==''){ ... }
Do you see why you can’t attach an event listener to firstName
? You are attempting to use this variable as both a string and an element but only one is correct.
thank you . now , i understand the problem
This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.