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Prototype and This

When attaching a method onto a prototype, the methods can be called from another prototype method using "this".

Function Parameters from Array Values

Suppose we have a function with parameters and an array:

// A Function and an Array

function doSomething(stuff, thing1, thing2) {
  console.log("params were concatenated:" + " " + stuff + thing1 + thing2);
}

var justAnArray = ["a", "b", "c"];

Getting the Right 'this'

With jQuery, you often find yourself using an event listener with a callback function like so:

// Common Event Handler

$(document).ready(function () {
  $(".my-element").click(function () {
    console.log("this is ", this);
  });
});

Detect Max Screen Width

When a browser is zoomed in or resized, the reported maximum device screen width may not be what you expect. For example, you have a 1280px by 800px screen and fully maximized browser screen at 100% zoom level, but when you zoom into the page and use window.innerWidth to determine the max width, the value may not be 1280px.

Run Mocha on the Client Side

Install Nvm to install Node by following instructions here. Nvm allows you to switch to different versions of Node to manage dependencies. Install Component after Node is properly setup from here. Component is an asset management tool for the client side. After Nvm, Node and Component are working properly, make a directory on the desktop and change to it.

Concatenating when Logging without the Plus Sign

You can use the comma in place of the plus sign when concatenation is needed.

// Give the Comma a Try When Logging

var stuff = "my stuff";
// the comma acts like the plus to concatenate your strings
console.log("some text:", stuff);

Get Element's Attribute Value or Status

With JQuery, you can do this $('#your-element').hasClass('a-class') to check if the element has a certain class. The problem is that you have to know the class name ahead of time when you use .hasClass. I wanted a general way to know if the class attribute actually exists on the element, so I created the getAttrStat function for JQuery to see if the attribute in question on the element is undefined, empty, or has a value without knowing the attribute value ahead of time.