踩到Window resize在Preview print的雷
最近在作案的過程中遇到一個狀況，從Art design那邊拿到的頁面，會在Window resize的時候執行某個Function，本來一切都正常，但測試到Chrome和Firefox預覽列印時發現也會Trigger這個Event，會讓在預覽列印過後的頁面發生問題，所以必須要進行修正，以下是這個案例的說明：
先在測試頁加入以下的程式，發現在預覽列印的時候會Trigger window resize event：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Preview Print Test</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(window).resize(function() {
console.log("Window Resize");
});
</script>
</head>
<body>
<h1>Window Resize Test</h1>
</body>
</html>
網路上搜尋了一下解決方案，將Script改寫如下，可以順利解決，但不知道是不是最好的方法，如果大家有更好的也別忘了告訴我唷～
openResizeFn();
// Chorme
var print = false;
var mediaQueryList = window.matchMedia('print');
mediaQueryList.addListener(function (mql) {
if (mql.matches) {
closeResizeFn();
} else {
setTimeout(openResizeFn, 2000);
}
});
// Firefox
window.onbeforeprint = function () {
closeResizeFn();
};
window.onafterprint = function () {
setTimeout(openResizeFn, 2000);
};
// Common Function
function openResizeFn() {
$(window).on("resize", windowResize);
}
function closeResizeFn() {
$(window).off("resize", windowResize);
}
function windowResize() {
console.log("Window Resize");
}
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