覆盖警报并在 Javascript 中确认
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Override alert and confirm in Javascript
提问by Shawn Mclean
Is there a way to override alert("")and confirm("")in javascript?
有没有办法在javascript中覆盖alert("")和confirm("")？
I use jQuery, so if there is a way to do it in this framework, I'd appreciate it.
我使用 jQuery，所以如果有办法在这个框架中做到这一点，我会很感激。
I'd like to do stuff like:
我想做这样的事情：
override alert(msg){
//Show custom stuff here
}
override confirm(msg){
//Show custom stuff here.
return watever;
}
回答by Mark Kahn
Yes and no. You can simply replace them:
是和否。您可以简单地替换它们：
window.alert = function(msg){
// stuff
}
but you're not going to get the blocking functionality that alert and confirm give you, i.e. there will be NO way to get this code to work:
但你不会得到警报和确认给你的阻塞功能，即没有办法让这段代码工作：
if(confirm('Do Something?')){
// do stuff
}
You're generally better off making other functions to do similar things than you are trying to replace these.
通常最好让其他函数来做类似的事情，而不是试图替换它们。
回答by ctcherry
Just redefine it:
只需重新定义它：
window.alert = function(msg) { console.log(msg); }
回答by meder omuraliev
Just define a function named alertor confirm.
只需定义一个名为alertor的函数confirm。
function alert(){}; function confirm(){};
However, if you need reference to the original functions then you should save references to those by assigning var oldAlertor just define alertinside of another function, so window.alertstays untouched.
但是，如果您需要对原始函数的引用，那么您应该通过分配var oldAlert或仅alert在另一个函数内部定义来保存对这些函数的引用，因此window.alert保持不变。
(function() {
function alert(){}; // alert inside of this scope is your custom function
})();
