I can't find a recommended way to stop a function part way when a given condition is met. Should I use something like exit or break?
I am currently using this:
if ( x >= 10 ) { return; }
// other conditions;
7 Answers
Return is how you exit out of a function body. You are using the correct approach.
I suppose, depending on how your application is structured, you could also use throw. That would typically require that your calls to your function are wrapped in a try / catch block.
use return for this
if(i==1) {
return; //stop the execution of function
}
//keep on going
The return statement exits a function from anywhere within the function:
function something(x)
{
if (x >= 10)
// this leaves the function if x is at least 10.
return;
// this message displays only if x is less than 10.
alert ("x is less than 10!");
}
Use a try...catch statement in your main function and whenever you want to stop the function just use:
throw new Error("Stopping the function!");
Try using a return statement. It works best. It stops the function when the condition is met.
function anything() {
var get = document.getElementsByClassName("text ").value;
if (get == null) {
alert("Please put in your name");
}
return;
var random = Math.floor(Math.random() * 100) + 1;
console.log(random);
}
if (OK === guestList[3]) {
alert("Welcome");
script.stop;
}
throwing the exception when the condition is met to break the function.
function foo() {
try {
if (xyz = null) //condition
throw new Error("exiting the function foo");
} catch (e) {
// TODO: handle the exception here
}
}
