<html>
<head>
</head>
<body>
</body>
</html>
<script src="/lib/jquery.min.js"></script>
<script>
var a = 100;
alert("执行前,a的值为：" + a);//100
console.log(jQuery.fn.jquery);
console.time("执行远程JS耗时");
loadRemoteJs("/1.js"); //1.js 内容： a=20
console.timeEnd("执行远程JS耗时");
alert("执行后,a的值为：" + a);//20
console.log(jQuery.fn.jquery);
function loadRemoteJs(file) {
$.ajax({
url: file,
method: 'GET',
async: false
}).success(function (result) {
document.writeln("<script>" + result + "</script>");
});
}
//https://www.cnblogs.com/jxlsomnus/p/4269945.html
</script>
<script>
//(async function () {
// alert("执行前,a的值为：" + a);
// await $.getScript("/1.js");
// alert("执行后,a的值为：" + a);
//})();
</script>
<script>
//alert("执行前,a的值为：" + a);
//loadjs("/1.js");//1.js会重设a的值
//alert("执行后,a的值为：" + a);
//function loadjs(file) {
// var head = $('head').remove('#loadscript');
// $("<scri" + "pt>" + "</scr" + "ipt>").attr({ src: file, type: 'text/javascript', id: 'loadscript' }).appendTo(head);
//}
</script>