How JavaScript simplifies if... Else

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Simplify if... Else

If...else is so common that many people forget that there are other ways to judge conditions. For example, for a simple variable assignment, there is no need to use such a lengthy statement, and one-line expression is done:

/ / novice let test= boolean; if (x > 100) {test= true;} else {test= false;} / / abbreviated expression let test= (x > 10)? True: false; / / more direct let test = x > 10; console.log (test)

Ternary expressions can make complex conditional bifurcation judgments, but at the expense of some readability:

Let x = 300, let test2 = (x > 100)? 'greater 100': (x < 50)? 'less 50': 'between 50 and 100'; console.log (test2); / / "greater than 100" JavaScript is the abbreviation of JavaScript, it is a literal scripting language, its interpreter is called JavaScript engine, is a part of the browser, mainly used for web development, can add a variety of dynamic effects to the website, make the page more beautiful.

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