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Javascript loop variable registers dom events - powerful closure_javascript skills

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Release： 2016-05-16 18:20:06

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Encountered this problem today:

Copy code The code is as follows:

 
//pseudocode
for (var i=0; iaddEvent(obj[i], "click", func(i)); 
} 

The result appears The problem was solved. All DOM events were registered when i=n. After checking some information, it was said that this was changed during the loop process, and the registered events were also changed accordingly. I found a solution;

Copy code The code is as follows:

 
for (var i=0; i< n; i ) { 
(function (i){addEvent(obj[i], "click", function (){func(i);});})(i); 
} 
 

Use bipack to maintain persistent references to variables, very powerful!
(If you have a better method, please feel free to enlighten me (*^__^*) Heehee...)

Related labels：

javascript cycle

source：php.cn

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