Using JSON in JavaScript
With JSON, you can store a JavaScript native object in pure string format.
Tag: data
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Using HTML data attributes in JavaScript and CSS
Data attributes allow you to store string data directly on HTML elements.
Preview a user image before it is uploaded
How to preview an image and check its dimensions and size before uploading.
Create a client-side download with JavaScript
You can prompt a download to begin in a user's browser without contacting a server.
Generate QR codes using JavaScript
In JavaScript, QR codes can be generated using the free QRCode.js library.
Comparing dates in JavaScript
Dates that are stored in Date objects can be compared or sorted via their Unix timestamp.
A guide to using localStorage and sessionStorage
localStorage and sessionStorage objects allow you to store data from to user's browser.
map() vs forEach()
The map() and forEach() methods both iterate through arrays, but are not interchangeable.
Using the File System module (‘fs’) in Node.js
Running JavaScript in Node.js, you have access to the file system.
Pass data from one HTML page to another
You can make data persistent across pages by accessing the Web Storage API.
