Shulou(Shulou.com)06/01 Report--

This article mainly introduces the JavaScript do not use eval () or function constructor, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Do not use eval () or function constructor

Eval () and function constructor (Function consturctor) are expensive, and the JavaScript engine converts the source code into executable code each time it is called.

Var func1 = new Function (functionCode); var func2 = eval (functionCode); what is JavaScript? JS 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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