GOOCODE - Find your code/scripts

5 We submit the form, a limit can not be ignored is to prevent users who repeatedly submit the form, because there may be a user continuously hits the submit button or a malicious attacker to submit the data, then we submit the data after processing, such as modifying or adding data to the database when they will get into trouble.

So how do you avoid duplicate submission form this phenomenon happen? We can see from many aspects, first from the front end to make restrictions. In the front-end javascript is disabled after a button is clicked, the disabled, this simple method of preventing multiple clicks the submit button, but the disadvantage is that if the user has disabled javascript script is invalid. Second, we can do after submitting the redirect page redirection, that is submitted after the jump to a new page, the main F5 avoid duplicate submissions, but there are drawbacks. Thirdly, it is made unique database index constraint. Fourth, it is to do the session token authentication.

15 By clicking the menu on side of the page it is loaded along with the corresponding slide transition animations, but also with the progress bar effect. Of course, the page loaded is driven by Ajax, the entire loading process of transition is very smooth, with very good user experience.

HTML structure, .cd-main body of the page contains content, .cd-side-navigation contains the side navigation bar, # cd-loading-bar is used to make a progress bar with animation.