Is there a way to create and run javascript in Chrome

Question

Is there a way  like an extension or application  in Chrome to create and run  js files in Chrome

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You need an HTML page to load a JS file

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How to create a Javascript Bookmark in Chrome  You can use a Javascript bookmark  https   helloacm com how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example   Just create a bookmark to look like this  Ex  Name  Test javascript bookmark in Chrome  URL  javascript alert  Hello world      Just precede the URL with javascript   followed by your Javascript code  No space after the colon is required  Here s how it looks as I m typing it in   Now save and then click on your newly-created Javascript bookmark  and you ll see this   You can do multi-line scripts too  If you include any comments  however  be sure to use the C-style multi-line comments ONLY     comment      and NOT the C  -style single-line comments     comment   as they will interfere  Here s an example  URL  javascript      This is my javascript demo     function multiply a  b         return a   b     var a   1 4108  var b   3 7654  var result   multiply a  b   alert  The result of     a     x     b           result toFixed 4     And here s what it looks like as you edit the bookmark  after copying and pasting the above multi-line script into the URL field for the bookmark    And here s the output when you click on it   References   https   superuser com questions 192437 case-sensitive-searches-in-google-chrome 582280 582280 https   gist github com borisdiakur 9f9d751b4c9cf5acafa2 Google search for  quot chrome javascript   in bookmark quot  https   helloacm com how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example  https   helloacm com how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example  https   javascript info hello-world JavaScript equivalent to printf String Format

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if you don t want to create an explicitly a js file but still want to test your javascript code  you can use snippets to run your JS code   Follow the steps here     Open Dev Tools Go to Sources Tab Under Sources tab go to snippets    New snippet Past your JS code in the editor then run command   enter in Mac   You should see the output in console if you are using console log or similar to test  You can edit the current web page that you have open or run scripts  load more javascript files   Just note  this snippets are not stored on as a js file  unless you explicitly did  on your computer so if you remove chrome you will lose all your snippets   You also have a option to save as your snippet if you right click on your snippet

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Usually one uses text editor to create source files  like JavaScript   I use VisualStudio which have intellisence supprt for JavaScript  but any other editor will do  vim or notepad on Windows are both fine    To run JavaScript by itself you need something that can do that  I e  on Windows you can directly run script from console using CScript script js command  There are other ways to run JavaScript on Windows and other OS    Browsers  like Chrome  do not run JavaScript by itself  only as part of a page or extensions  It is unclear what one would expect of browser to do with JavaScript by itself

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You can also open your js file path in the chrome browser which will only display text   However you can dynamically create the page by including   var script   document createElement  script    script type    text javascript   script src    myjs js   document head appendChild script     Now you can have access to the js variables and functions in the console   Now when you explore the elements it should have  included   So not i guess you dont need a html file

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Open a basic text editor and type out your html  Save it as  html  If you type in file    C   into the address bar you can then navigate to your chosen file and run it  If you want to open a file that is on a server type in file     and instead of C   the first letter of the server followed by

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Try this   1  Install Node js from https   nodejs org   2  Place your JavaScript code into a  js file  e g  someCode js   3  Open a cmd shell  or Terminal on Mac  and use Node s Read-Eval-Print-Loop  REPL  to execute someCode js like this        node someCode js  Hope this helps

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You don t necessarily need to have an HTML page  Open Chrome  press Ctrl Shift j and it opens the JavaScript console where you can write and test your code   - Chrome JavaScript Console

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You should write in file    lt script gt         write your JavaScript code here  lt  script gt    save it with  html extension and open with browser   For example      this is test html  lt script gt     alert  Hello       var a   5     function incr arg          arg           return arg                 alert a    lt  script gt

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