Javascript setInterval 在 Google Chrome 扩展程序中不起作用(仅触发一次)
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/8971871/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
setInterval not working (firing only once) in Google Chrome extension
提问by Camilo Martin
Just as the title says: setInterval
is only firing its callback once.
正如标题所说:setInterval
只触发一次回调。
manifest.json:
清单.json:
{
//...
"content_scripts" : [{
"js" : ["code.js"],
//...
}],
//...
}
code.js (example):
code.js(示例):
setInterval(alert('only shown once'),2000);
Why, and how I could fix it? The code works well outside of an extension (even in a bookmarklet).
为什么,我该如何解决?该代码在扩展程序之外运行良好(即使在书签中)。
回答by qwertymk
setInterval(function() { alert('only shown once') },2000);
You need to pass a function reference like alert
and not a return value alert()
您需要传递一个函数引用alert
而不是返回值alert()
回答by Quentin
setInterval
isn't working at all.
setInterval
根本不工作。
The first argument should be a function, you are passing it the return value of alert()
which isn't a function.
第一个参数应该是一个函数,你传递给它的alert()
不是函数的返回值。
Use the three argument version:
使用三个参数版本:
setInterval(function,time,array_of_arguments_to_call_function_with);
setInterval(alert,2000,['only shown once']);
回答by Dario
The way you wrote it it's wrong:
你写的方式是错误的:
setInterval()
wants a function and a numerical value: setInterval(function(){//your code}, timeInterval)
.
setInterval()
想要一个函数和一个数值:setInterval(function(){//your code}, timeInterval)
。