JS SMS Verification Code Countdown function implementation (no verification code, only countdown) _javascript skills

1. Function description

When the user wants to obtain the authentication code, clicks obtains the authentication code freely, then starts the countdown, the Countdown period button text is the remaining time x seconds, and cannot press the state, after the countdown, the button changes for clicks sends.

2, analysis

The timer must be used. Click on the button and make a judgment in the timer. Countdown 60 seconds, to 0 end.

3, code implementation:

Focus on: The timer in the next countdown before, be sure to clear up, so that the next timer to ensure that the countdown is normal.

<! DOCTYPE html>  

The above is a small set to introduce the JS SMS Verification Code Countdown function implementation (no verification code, only countdown), I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!