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Hey everyone, am trying to get the user value from an input box and store the value in a variable.
But whenever I use the ".value" property it is giving me an error saying I can't set the value of null so what could be the problem and solution to this problem thank you in advance.
3 Antworten
+ 4
The js code in SL play ground is embed in the <head> </head> tag by default. At this time (when your js code loading) your html element use to store user's input still not created yet and that cause the error. So you need to wrap your js code like this:
window.onload = function(){
Your code goes here
}
+ 3
Can you show us your code here?
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// variables for greeting text code
var chatbot = document.querySelector('.chatbot');
var reply = document.querySelector('.reply');
var response_bot = document.querySelector('.response_bot');
var send_button = document.querySelector('.send_button');
var input = document.querySelector('#input').value;
// fuction for greeting text code
function hello() {
if(isNaN(input) || input < 1 || input > 10) {
alert("how are you " + input );
return false;
}
}
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