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html - ajax请求中使用同步通信javascript是卡在哪一步？
PHP中文网
PHP中文网 2017-04-10 17:40:49
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var xhr = new XMLHttpRequest();

xhr.open('get','xx.xx',false);
xhr.onreadyStateChange = function(){
 if(xhr.status == 200 && xhr.readyState == 4) {
   console.log('finish');
 }
}
xhr.send(null);
console.log('test');

是卡在send之后吗？也就是finish出来之后才出来test

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reply all(2)
洪涛
洪涛2017-04-10 17:42:49 2 floor

先出来 test 再出来 finish

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PHPzhong
PHPzhong2017-04-10 17:42:49 1 floor 
xhr.open('get','xx.xx',true);

试试，呵呵，无效不要钱

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