New Perspectives on HTML5, CSS3, and JavaScript
6th Edition
ISBN: 9781305503922
Author: Patrick M. Carey
Publisher: Cengage Learning
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Question
Chapter 9, Problem 8CP4
a)
Program Plan Intro
To declare a countdown() function, which will update the minsLeft, secsLeft, and timeLeft variables every second. This function should not have any parameters and it should calculate a new value for the minsLeft variable by dividing the timeLeft variable by 60 and using the Math.floor()method to round that value down to the next lowest integer in file ph_clock.js.
b)
Program Plan Intro
To calculate the new value for the secsLeft variable which is equal to the value of the timeLeft variable minus 60 times the minsLeft variable within the countdown()function in file ph_clock.js.
c)
Program Plan Intro
To create a minsString variable and setting its value equal to the value returned by the addLeadingZero() function by using minsLeft as the parameter value within the countdown()function in file ph_clock.js.
d)
Program Plan Intro
To create a secsString variable and setting its value equal to the value returned by the addLeadingZero() function by using secsLeft as the parameter value within the countdown()function in file ph_clock.js.
e)
Program Plan Intro
To change the text content to the value of the minsString variable within the element with the id minutes and to change the text content to the value of the secsString variable within the element with the id seconds within the countdown()function in file ph_clock.js.
f)
Program Plan Intro
To call the checkTimer()function within the countdown()function in file ph_clock.js.
g)
Program Plan Intro
To declare a decrement operator to decrease the value of the timeLeft variable by 1 within the countdown()function in file ph_clock.js.
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Chapter 9 Solutions
New Perspectives on HTML5, CSS3, and JavaScript
Ch. 9.1 - Prob. 2QCCh. 9.1 - What is the difference between asynchronously...Ch. 9.1 - Provide the command to display an alert dialog box...Ch. 9.1 - Prob. 8QCCh. 9.2 - Prob. 6QCCh. 9 - Prob. 2RACh. 9 - Prob. 4RACh. 9 - Prob. 5RACh. 9 - Prob. 6RACh. 9 - Prob. 7RA
Ch. 9 - Prob. 8RACh. 9 - Prob. 9RACh. 9 - Prob. 10RACh. 9 - Prob. 11RACh. 9 - Prob. 1CP1Ch. 9 - Prob. 2CP1Ch. 9 - Prob. 3CP1Ch. 9 - Prob. 4CP1Ch. 9 - Prob. 5CP1Ch. 9 - Prob. 6CP1Ch. 9 - Prob. 7CP1Ch. 9 - Prob. 8CP1Ch. 9 - Prob. 9CP1Ch. 9 - Prob. 10CP1Ch. 9 - Prob. 11CP1Ch. 9 - Prob. 12CP1Ch. 9 - Prob. 13CP1Ch. 9 - Prob. 14CP1Ch. 9 - Prob. 15CP1Ch. 9 - Prob. 16CP1Ch. 9 - Prob. 1CP2Ch. 9 - Prob. 2CP2Ch. 9 - Prob. 3CP2Ch. 9 - Prob. 4CP2Ch. 9 - Prob. 5CP2Ch. 9 - Prob. 6CP2Ch. 9 - Prob. 7CP2Ch. 9 - Prob. 8CP2Ch. 9 - Prob. 9CP2Ch. 9 - Prob. 10CP2Ch. 9 - Prob. 11CP2Ch. 9 - Prob. 12CP2Ch. 9 - Prob. 13CP2Ch. 9 - Return to the bc_today.js file and change the...Ch. 9 - Prob. 15CP2Ch. 9 - Prob. 1CP3Ch. 9 - Prob. 2CP3Ch. 9 - Prob. 3CP3Ch. 9 - Prob. 4CP3Ch. 9 - Prob. 5CP3Ch. 9 - Above the randomlnt() function insert a command to...Ch. 9 - Prob. 7CP3Ch. 9 - Prob. 8CP3Ch. 9 - Prob. 9CP3Ch. 9 - Prob. 10CP3Ch. 9 - Prob. 2CP4Ch. 9 - Prob. 3CP4Ch. 9 - Prob. 4CP4Ch. 9 - Prob. 5CP4Ch. 9 - Prob. 6CP4Ch. 9 - Prob. 7CP4Ch. 9 - Prob. 8CP4Ch. 9 - Explore 9. Scroll back to the top of the file and,...Ch. 9 - Prob. 10CP4Ch. 9 - Prob. 13CP4
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