CODE EXAMPLE FOR JAVASCRIPT

Foreach array in JavaScript fsd

Your best bets are usually

a for-of loop (ES2015+ only; spec | MDN) - simple and async-friendly
for (const element of theArray) {
    // ...use `element`...
}
forEach (ES5+ only; spec | MDN) (or its relatives some and such) - not async-friendly (but see details)
theArray.forEach(element => {
    // ...use `element`...
});
a simple old-fashioned for loop - async-friendly
for (let index = 0; index < theArray.length; ++index) {
    const element = theArray[index];
    // ...use `element`...
}
(rarely) for-in with safeguards - async-friendly
for (const propertyName in theArray) {
    if (/*...is an array element property (see below)...*/) {
        const element = theArray[propertyName];
        // ...use `element`...
    }
}