Sleep in JavaScript – delay between actions

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You can use setTimeout to achieve a similar effect:

var a = 1 + 3;
var b;
setTimeout(function() {
    b = a + 4;
}, (3 * 1000));

This doesn’t really ‘sleep’ JavaScript—it just executes the function passed to setTimeout after a certain duration (specified in milliseconds). Although it is possible to write a sleep function for JavaScript, it’s best to use setTimeout if possible as it doesn’t freeze everything during the sleep period.

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