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How to wait for a promise within a loop block

JavaScript promises enable developers to write asynchronous applications in JavaScript Loops are ways of iterating elements For instance doing an asynchronous task within a for loop can be done as follows; Note that lag is used to emulate some delay. const items = [1, 2, 3, 4] const lag = async (delay) => {     return new Promise((resolve) =>         setTimeout(() => res(`${delay / 1000} sec`), delay)) } items.forEach(async (item) => {     const seconds = await lag(1000 * item)     console.log(seconds) }) expected output 1 sec 2 sec 3 sec 4 sec After running the code above every second some text was printed
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Ways of iterating Object properties in JavaScript

For Objects the ways of iterating their properties are not that plentiful as with Arrays. take for instance we have an object of dogs and cat characteristics const pets = { {name: " Jenny ", eyes: "brown"}, {name: "max", eyes: "blue"} } To iterate through the characteristics using for loop for (pet in pets) {     console.log(`${pets[pet].name} has eye color ${pets[pet].eyes}`} } Alternatively you can use objects.keys and object. entries for (element in Object.entries(elements)) }
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Install steam locomotive sl using apt

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With statement in JavaScript

JavaScript 'with statement' is a simplified way to access object properties as variables. Take for instance; const dog = "puppy" const mascots = {     'tux': "tuxedo",     'cow': 'cow' } with(mascots) {     console.log(tux)     // tuxedo     console.log(cow)     // cow     console.log(dog)     // puppy } properties of mascots are converted to variables accessible within the with block 'dog' is not part of mascots and as a fallback, dog global is returned. At the time of writing this post with statement is discouraged. It's not allowed in 'safe mode' With the above sample you can do the same thing using destructureing operator const {cow, dog, tux} = mascots console.log(tux) // tuxedo console.log(cow) // cow console.log(dog) // puppy
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JavaScript var const and let

Signification and let are new JavaScript methods of declaring a variables on modern browser's you don't need to enable strict mode to make use of const, and let What's the difference between var , let and const Immutability when you declare a variable using const its value is immutable ie you can't simply reassign the variable with another value neither can you declare const variables as const variable, another; because it's pointless afterall scope of this let variable decelerations are block scoped therefore if used in an if statement or in a function its value is scoped within that block
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