In addition to console.log(), the console has several other functions to print data into the console in different predefined formats. This feels like it’s not that big a deal until you’re optimizing performance and do it a thousand times trying to figure out what egregious React sin you’ve committed. You skip out on wrapping the whole function in curly braces and adding a return. If you wrap the argument passed into console.log in What follows are some of the simplest tricks I’ve found for debugging in the console. Trust me on this one though, those prong thingies on the back of your hammer aren’t just for ripping out nails.

In an ecosystem where tools, keyboard shortcuts, and API’s flow like milk and honey in the promised land, it’s hard to justify picking up a new hammer when your old one works just fine. The same idea can be applied to the console. “I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail.” -Maslow The law of the instrument states that it’s easy to develop overconfidence in a familiar tool. The console is the tool developers use when debugging their own applications. The console is one of the first tools developers learn about. Let is also used to declare variables(new way)Ĭonst is used to declare const values.By Kyle Gill Commanding the Javascript console Useful tricks for debugging, formatting, and efficiency Var is used to declare variables(old way of declaring variables)

Executable in both browser and server which has Javascript engines like V8(chrome), SpiderMonkey(Firefox) etc.

Embedded along with HTML and makes web pages alive.

Javascript is required to design the behaviour of the web pages. Javascript(JS) is a object-oriented programming language which adhere to ECMA Script Standards. The editor shows sample boilerplate code when you choose language as Javascript and start coding. Getting started with the OneCompiler's Javascript editor is easy and fast. It's one of the robust, feature-rich online compilers for Javascript language. Write, Run & Share Javascript code online using OneCompiler's JS online compiler for free.

Javascript online console