Im trying to have an input to be required in javascript

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So myh problem is that i want my javascript's if statement to have an input required when entering in the input in my form on HTML but want to include more than 1 id in the id box if that makes sense. this is for my form validation and using this code makes the form not validate and submit straight away

What I have tried:

if(product &&  product1 && product2 && product3 && product4 ==""){
     text="**Input Required**";
	 errormsg.innerHTML = text;
     return false;
    }

Posted 12-Apr-21 18:06pm

BIGBOYLITTLEBRAIN

Updated 14-Apr-21 5:52am

v3

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thatraja · Answer 1 · 2021-04-12T20:45:00

Comparison from your code is wrong. Value needed for each variables. Below one is sample valid example.

JavaScript

if(UserID == "" && Password =="")/*If both UserID and Password are empty*/
{
....
}

Sometime you need to other logical character. For example, above code is wrong in one way because fields like UserID and Password are mandatory so you have to use OR condition in validation.

JavaScript

if(UserID == "" || Password =="")/*If UserID or Password are empty*/
{
....
}

JavaScript Comparison and Logical Operators[^]

Here few sample related to display error messages
Simple Javascript Validation without Alerts - Java Infinite[^]
How to display error without alert box using JavaScript ? - GeeksforGeeks[^]

Search Web for more samples.