Implementation of javascript timer

Effect:

Display the current time and automatically grow

Add a timer for the button (for start and pause)

Effect:

#Click the start button to count from 0 and add 1 every second. Click the button to stop and maintain the current state.

Summary:

1. setInterval(code, interaction time);

Parameters: code: can be a function name or code string; interaction time: set the interaction time

clearInterval(id_from_setInterval);

Parameter: ID value returned by setInterval().

2. setTimeout (code, delay time);

Parameters: code: can be a function name or code string; delay time: set the delay time

clearTimeout (id_from_setTimeout) ;

Parameter: ID value returned by setTimeout().

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