javascript if condition && condition doesn't work

javascript if-statement operator-keyword

28,377

Solution 1

It sounds like || is what you are looking for here. The && operator is only true if both the left and right side of the && are true. In this case you appear to want to display the message if the value is 1 or empty. This is exactly what the || operator is for. It is true if either the left or right is true

Solution 2

If Or operator is working, means there are some javascript errors in your second part of condition. check document.form.des.value=='' (maybe just open your javascript console in Chrome/Firefox/IE8+)

28,377

Ivo San

samsung galaxy pocket

Updated on July 12, 2020

Comments

Ivo San almost 4 years
the AND && operator doesn't work, but when i replace it with an OR || operation it is workin, why? I just used OR || operator for testing, what i need is an && operator. Please help. thanks
```
function validate() {
    if ((document.form.option.value == 1) && (document.form.des.value == '')) {
        alert("Please complete the form!");
        return false
    } else return true;
}
```
i also tried nested if but it doesn't work too
```
    if(document.form.option.value==1)
    {
         if(document.form.des.value=='')
        {   
            alert ("Please complete the form!");
            return false

        }
    }   
```
- PoeHaH almost 12 years
  
  so it must be a logical error
- starbeamrainbowlabs almost 12 years
  
  To make sure that the user completes a form, try using html5 form validation.
- Ivo San almost 12 years
  
  thanks @starbeamrainbowlabs, html5 vadidation is so easy. NICE
Ivo San almost 12 years

im going to test both left and right, both must must be true. i need &&