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JavaScript

JavaScript tips, functions, and how-tos.

Test Javascript Synax

December 22, 2018 mike JavaScript, Online Tools

Test your javascript for bugs by copying and pasting your code below.

Force String to Lower or Upper Case

December 21, 2018 mike JavaScript

JavaScript has built in methods to manipulate strings making this task easy. You can call the toLowerCase() or toUpperCase() on the string directly. Make a

Hide and Show and Element Using JQuery

December 17, 2018 mike JavaScript

You have a div tag you want to hide with the id “myElementID”. You want to show that same div again. Don’t forget to include

Auto Selecting Input Field Contents on Mouse Entering Field

February 21, 2018 mike HTML & UI, JavaScript

You can do this simply with an onclick event like below.

Add an Image to the DOM Dynamically

February 15, 2018 mike HTML & UI, JavaScript

This example will work fairly well cross-browser. In IE it will use new Image and everything else it will use createElement. There are bugs in

A Simple PhantomJS Screenshot Server

November 20, 2017 mike JavaScript

This is a simple screenshot server running over http. You append a url (a urlencoded url) to the server and it returns a PNG image

javascript fonts

Detecting Installed Fonts

November 13, 2016 mike JavaScript

I did a fair amount of googling on this one.  My original need for this was to see what fonts PhantomJS supported for screenshots.  The

jquery

Get Screen Size

November 11, 2016 mike JavaScript

You actually don’t need jQuery to simply find the user’s screen resolution size.  It’s fairly simple with plain old javascript. Your current screen resolution is:

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