how do I create an infinite loop in JavaScript

Question

I want to create an infinite loop in JavaScript.

What are some ways to achieve this:

eg

for (var i=0; i<Infinity; i++) {}

Solution 1

You can also use a while loop:

while (true) {
    //your code
}

Solution 2

By omitting all parts of the head, the loop can also become infinite:

for (;;) {}

Comments

[Derek 朕會功夫]

while(1){} works in almost all programming languages.

[rolfl]

This question is not a duplicate of stackoverflow.com/questions/5835126/javascript-infinite-loop ... even though the titles are similar

[nunop]

Won't this throw an exception?

[alexgula]

That is better than while(true){}: if you use ESLint, it won't trigger eslint.org/docs/rules/no-constant-condition.

[Alberto S.]

This will block the Javascript execution in the page, leading to a browser dialog asking to stop or debug the script. It won't work

[counterbeing]

For some reason, I just hate how this looks in my code. So cryptic. I wonder if there's a more semantic way to do it? But yeah, seems like the way to go in this case!

[ololoepepe]

This one seems a better choice, since some code optimizers (like Webpack Terser plugin) spam with warnings like Condition always false and Dropping unreachable code when using the while (true) variant.

[JoseLinares]

@Alberto Except if you are not programming for browsers

[T.CK]

You can break for(;;) {} loops with true between the semicolons for(;true;) { if(condition) break; //do work }.

[Denis Giffeler]

@Alberto It's absolutely ok inside generator functions.

[gilad905]

I like it just because it's unique :D

[Ravindu Sachintha]

In a case, if it is expected to execute in a browser, a better way to implement an infinite loop Is using setTimeout or setInterval function. This post contains more descriptive details about that. (nextcsguide.com/javascript/…)