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[js] 第549天 请问css/html/js/img的下载顺序是怎样的？都是并发执行的吗？ #3064

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haizhilin2013 opened this issue Oct 15, 2020 · 1 comment
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[js] 第549天 请问css/html/js/img的下载顺序是怎样的？都是并发执行的吗？ #3064

haizhilin2013 opened this issue Oct 15, 2020 · 1 comment
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@haizhilin2013
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第549天 请问css/html/js/img的下载顺序是怎样的？都是并发执行的吗？

作者：Alex

3+1官网

我也要出题
@haizhilin2013 haizhilin2013 added the js JavaScript label Oct 15, 2020
@qubitsky
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应该是按照html内容的先后顺序加载吧
css/js默认是阻塞式加载
img是异步加载
所以默认情况下应该只有img是并发执行的
另外，可通过script标签的async属性将js加载改成异步的

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@haizhilin2013 @qubitsky