Question

0 0

比如1.js，有可能会多次引入到页面。如何通过1.js自身的代码，防止引入多次？或者，在引入多次时，让第二次以及以后的引入代码不必执行？

10 years, 5 months ago

share

爱上百合的狮子 10 years, 5 months ago

Answer 1

0

a.js:


 !function(){
  if(window['a.js']) return;
  window['a.js'] = true;
  console.log('code here');
}();

answered 10 years, 5 months ago

share

kanibep answered 10 years, 5 months ago