catch javascript 的意外令牌错误
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unexpected token error for catch javascript
提问by Imo
I am banging my head trying to find the error in this code. I have checked it so many times can someone point out where the problem is?
我正在努力寻找这段代码中的错误。我已经检查了很多次，有人能指出问题出在哪里吗？
$(function() {
try {
function endswith(str, ends) {
if (ends === '') return true;
if (str == null || ends == null) return false;
str = String(str);
ends = String(ends);
return str.length >= ends.length && str.slice(str.length - ends.length) === ends;
}
var referrer = new URL(document.referrer).domain;
if (endswith(referrer, "xyz.com")) {
$(".logo .logo-external").remove();
} else {
$(".logo .logo-internal").remove();
}
} catch () {}
});
回答by joyBlanks
catch (e) {}You missed the variable e
catch (e) {}你错过了变量 e
$(function() {
try {
function endswith(str, ends) {
if (ends === '') return true;
if (str == null || ends == null) return false;
str = String(str);
ends = String(ends);
return str.length >= ends.length && str.slice(str.length - ends.length) === ends;
}
var referrer = new URL(document.referrer).domain;
if (endswith(referrer, "xyz.com")) {
$(".logo .logo-external").remove();
} else {
$(".logo .logo-internal").remove();
}
} catch (e) {}
});
回答by themefield
As per MDN, try...catchsyntax is defined similar to the following:
根据MDN，try...catch语法定义类似于以下内容：
try {
try_statements
}
...
[catch (exception_var) {
catch_statements
}]
[finally {
finally_statements
}]
This means the exception_varis NOT optional. Otherwise, it would look like this:
这意味着exception_var不是可选的。否则，它看起来像这样：
...
[catch ([exception_var]) { // Uncaught SyntaxError: Unexpected token )
catch_statements
}]
...
