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JavaScript変数の基本とvar let constの使い分け

JavaScriptで使われる変数の基本や、var・let・constそれぞれの特徴と違いを初心者向けに解説します。正しい変数の使い方を理解し、より読みやすいコードを書くための基礎を学べる内容です。
blog.csdn

JavaScript let 和 const

本内容遵循CC 4.0 BY-SA版权协议 ES6 (ECMAScript 2015) 引入了 let 和 const，解决了 var 存在的变量提升、作用域污染和重复声明等问题。 用于声明常量，声明时必须初始化，且不能重新赋值。 const PI = 3. ...
howtogeek

JavaScript Types: What Are They and How Do You Check Them?

A technology enthusiast, Bobby studied Computer Science at the University of Southampton before working in a number of roles across industries, from the private sector to the charitable one, at ...
builtin

How to Get the Last Element of an Array in JavaScript

There are several ways to get the last element of a JavaScript array, including length property and square bracket notation, slice() method and pop() method. Here are nine methods to try. In this ...