How can we read and write a file using JavaScript

Basically, JavaScript can not read and write a file. But it should be clearer: JavaScript can not read and write a file “on server”. What about on client side? Yes, JavaScript can read and write file on client side.

Here I share HTML and JavaScript code that can perform (a sort of) file read and write on client machine.

And here is the live result:

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Habibie is an Indonesian freelance programmer familiar with PHP, MySQL, HTML5, CSS3, JavaScript, Java, Swift, Python and C#. He makes Android and iOS games and apps. He's also good at graphics design, video editing, visual effect and animation.