Tips for making your web site WCAG compliant

These are some of the tips for making sure that our site is WCAG compliant

• Label  all form elements
• Provide alternate text for non-text content. This would help people who are blind with assistance technology which can announce to them.People who are blind can use screen readers like 
• VoiceOver is inbuilt in mac
• NVDA and JAWS has to be downloaded for windows
• Chrome browser has chromevox
• We need to make sure that color contrast meets minimum thresholds. There are guidelines for threshold
• Add dots to end of important color message
• Add captions to audio content
• Based on the guidelines we need to make sure that we have the ratio for the contrast for all the colors in our website
• Use aria guidelines as mentioned in the link http://www.prathapkudupublog.com/2017/05/overview-of-wcag.html

        

Overview of WCAG

WCAG is a series of web accessibility guidelines published  by W3C.

There are 3 levels of WCAG 2.0 specifications.

1. WCAG Single Level A,
2. WCAG Double Level A.
3. WCAG Triple Level A

Four important features of Angular 1

Tricky double problem

In one of the interview I was asked how to eliminate tricky double in an array.I have not heard about tricky double.

Tricky double means
" 1, 2, 8, 9, 1, 2 , 3, 2 " . In this example what we notice is that 1, 2 is a  tricky double. However 2 is repeated twice it is not a tricky double.

JavaScript pass by reference and pass by value

Pass by value

When we change the value in the inner scope a copy of the value is created, This is known as pass by value.

Promises in JavaScript

Promises

Promises in JavaScript are like promises in real life

• A promise can only succeed or fail once
• It cannot succeed or fail twice, neither can it switch from success to failure or vice versa
• If a promise has succeeded or failed, we later add a success/failure callback. The correct callback will be called, even though the event took place earlier

Closures in JavaScript

A closure is an inner function that has access to the outer (enclosing) function’s variables—scope chain. The closure has three scope chains: it has access to its own scope (variables defined between its curly brackets), it has access to the outer function’s variables, and it has access to the global variables.