Exercise 10.3

This is Exercise 10.3, lecture on Javascript basics, used in the course IDATA2301 Web technologies at NTNU, campus Aalesund.

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Purpose

The purpose of the exercise is to get familiar with event handling in Javascript: executing code on specific events, such as when the document is loaded, reacting on a button click or changed value in an input field. You will also practice using timers.

Instructions

Create a new HTML document, include a Javascript block there. Implement the following features:

  1. Create a function which prints the square root of 1764 in the console.
  2. Call this function when the document is loaded.
  3. Print "Hello, i" (where i is a counter, incremented by one every time) to the console every second.
  4. Add two buttons A and B. Print a message to the console (a different message for each button) whenever a button is pressed.
  5. Add a text input field. Whenever the text changes there, print a message in the console: "The text changed".

Solution

You can find a solution here.