Wys³any: Pon Gru 25, 2023 11:46 Temat postu: There are many more performance
Optimization techniques I strongly encourage you to share in a comment what website performance optimization techniques you use. I also encourage you to read the article on the piecioshka blog where you will find many more optimization techniques. What is lazy loading Lazy loading is a technique for optimizing the loading of resources on a website. It involves delaying the loading of certain page elements until they are actually needed. The purpose of lazy loading is to speed up page loading and reduce network bandwidth consumption. The effect will be visible especially in the case of websites with a lot of multimedia content.
The lazy loading technique is most often used for images but it can also be used to delay the loading of JS code CSS fonts and Phone Number List elements iframe. Write a function that will be called every . seconds. The function should be called no more than times. function example let a const interval setInterval console.log a if a clearInterval interval example To write this function I used the function setIntervalthat allows you to trigger an action in a given time period. After the th call I break the interval using the function clearInterval. What is closure.
Closure is a phenomenon that occurs when an internal function accesses variables from an external function even after the external function has finished executing. It will be best to illustrate this with an example. function outer const outerVar 'outer var' function inner console.log outerVar return inner const closureExample outer closureExample 'outer var' What is a mode used for strictin JS Why was it introduced into the standard in this form JavaScript is known for being inconsistent unintuitive and unusual in some places. To partially solve the described problem the mode was introduced strict. For example in mode strictvariables must be declared using the keywords var letor const which will not cause errors outside of strict mode. There are more behaviors that change the mode strict. To enable mode strict you must declare it using 'use strict'. The second part of the question is interesting because the answer can be deduced. Introducing strict mode as the default would cause many existing websites and scripts to stop working. _________________ Phone Number List
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