a)
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)
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)
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)
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)
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)
To call the checkTimer()function within the countdown()function in file ph_clock.js.
g)
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
Bndl: Llf New Perspectives Htm L5 Css3 & Javascript, 6th Edition
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