Run a JavaScript script within a browser without the need to generate separate HTML or JavaScript test files

Question

Run a JavaScript script within a browser without the need to generate separate HTML or JavaScript test files

I am currently learning JavaScript and I have accumulated numerous small pieces of code that I want to test.

Is there a way to do this in Chrome or any other browser without having to create a temporary .js/.html file?

Someone recommended using Chrome's console, but as far as I know, it only allows testing a single line of code, such as alert('myVar has a value');. It does not seem possible to test multiple lines of script like

if(myVar){
  alert('myVar has a value');
}
else {
  alert('myVar does not have a value');
}

Furthermore, I would like the ability to run these tests offline and paste the JavaScript code snippets directly into the testing environment.

javascript debugging testing browser

Answer 1

Answer №1

If you're using Chrome's console, remember that pressing Shift + Enter allows you to input multiline statements.

Answer 2

If you're using Chrome's console, remember that pressing Shift + Enter allows you to input multiline statements.

Answer 3

Answer №2

You can easily experiment with multiple lines of code in Chrome's console - go ahead and give it a try. One important thing to remember about the console is that if you want to display a variable (such as console.log('myvar');), all you need to do is enter myvar into the console (any input will be shown in the console). If you call a function that doesn't return a value, you will see undefined in the console.

Another useful tool for testing code snippets is jsfiddle: http://jsfiddle.net/

Answer 4

You can easily experiment with multiple lines of code in Chrome's console - go ahead and give it a try. One important thing to remember about the console is that if you want to display a variable (such as console.log('myvar');), all you need to do is enter myvar into the console (any input will be shown in the console). If you call a function that doesn't return a value, you will see undefined in the console.

Another useful tool for testing code snippets is jsfiddle: http://jsfiddle.net/

Run a JavaScript script within a browser without the need to generate separate HTML or JavaScript test files

Answer №1

Answer №2

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