Check out example codes for "how to use grepper chrome extension". It will help you in understanding the concepts better.

Code Example 1

how to add ngClass in agular

Code Example 2

# Add an answer to Grepper by google searching a problem
# Then clicking the "Add Grepper Answer" link at the top 
# of your search result, or clicking (a) on your keyboard

# You can also add an answer by doing a google search
# clicking into a search result and typing Ctrl-g or Command-g
# on Mac. If there is a code snippet on the web page, you will
# see the "Easy Code Snag" button and you can click that
# to add an answer.

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