I have written a form validation using JS which ends with return(true);
function check() {
....validation code
return(true);
}
All I want is, need to check if check() function returns true, I want to execute another function.
Code I have tried is as follows:
if(check() === true) {
function() {
//Another function code
}
}
You should use return true; and your if statement doesn't need the === true comparison.
function check() {
//validation code
return true;
}
if(check()) {
//Another function code
}
check() returns true, to execute another function." The OP's code was wrong if that's what he wants to do. Fix the code to match the requirement, instead of changing the results to match the OP's code.First of all, return is not a function, you can just do this:
return true;
Now, to only execute myFunction if check returns true, you can do this:
check() && myFunction()
This is shorthand for:
if(check()){
myFunction();
}
You don't need to compare the return value of check with true. It's already an boolean.
Now, instead of myFunction(), you can have any JavaScript code in that if statement. If you actually want to use, for example, myFunction, you have to make sure you've defined it somewhere, first:
function myFunction() {
// Do stuff...
}
You just need to modify your first code snippet. return is a keyword, what you are trying to do is to execute it as a function.
function check() {
....validation code
return true;
}
You'll need to change your 2nd snippet slightly, to execute the function too however... The simplest way is to wrap it as an anonymous function using curly braces:
if(check()) {
(function() {
//Another function code
})();
}
if is completely useless... function statements like that get hoisted, there is no block scope in JS, just function scope. Try this: if(false){function test(){console.log(1)}} test();
if statement. Take a look at what the OP requested: "All I want is, to check if check() returns true, to execute another function."true. IIFE's have no business here. Not to mention that return(something) doesn't try to execute anything as a function. That's just some brackets wrapped around a return statement's parameter.You're not calling the function in your affirmative clause, only declaring it. To call an anonymous function do this:
(function (){...})()
You could type
$this.myFunction=function(){
//code here
}
and to execute some code if a the myFunction function is true, you could use booleans
such as e.g.
if(//your function is true){
and so on
checkcan return justtruealso you don't need to use===if(check())is fineif (check()) { ... }check()evaluates astrue- is it actually defined somewhere else outside that conditional?