jquery if null or empty
if (jQuery('#something').val().length != ''){}
or
if (jQuery('#something').val().length != 0){}jquery if null or empty
if (jQuery('#something').val().length != ''){}
or
if (jQuery('#something').val().length != 0){}javascript check if undefined or null
if( typeof myVar === 'undefined' || myVar === null ){
// myVar is undefined or null
}javascript check if not null
//Even if the value is 0, this will execute.
if (myVar !== null) {...}
//If you don't want it to execute when it's 0, then set it as
if (myVar) {...}
//This will return false if var value is 0.check if variable is undefined or null jquery
if (variable == null) {
// variable is either null or undefined
}Copyright © 2021 Codeinu
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