關於YUI壓縮器和JavaScript

Question

我在網站上使用把手。 因此，我需要將“ handlebars.runtime.js”發送到客戶端。 但是我發現來自官方網站的'handlebars.runtime.js'沒有被壓縮，因此我使用YUI壓縮器對其進行壓縮。

當我檢查壓縮的“ handlebars.runtime.js”時，發生了一些奇怪的事情：當與上一個代碼比較時，壓縮的代碼中有些代碼消失了。 壓縮文件的開頭是這樣的：

/*!

 handlebars v1.3.0

 Copyright (C) 2011 by Yehuda Katz

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.

 @license
 */
;var Handlebars=(function(){v (rest of the codes...)

如您所見，YUI壓縮器不會刪除注釋，並且在代碼的開頭有一個奇怪的分號。 誰能解釋一下？ 謝謝！

PS：開頭的未壓縮的“ handlebars.runtime.js”是這樣的：

/*!

handlebars v1.3.0

Copyright (C) 2011 by Yehuda Katz

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

@license
*/
/* exported Handlebars */
var Handlebars = (function() {
// handlebars/safe-string.js
var __module3__ = (function() {
"use strict";
var __exports__;
// Build out our basic SafeString type
function SafeString(string) {
this.string = string;
}

 SafeString.prototype.toString = function() {
  return "" + this.string;
 };

  __exports__ = SafeString;
  return __exports__;
})();

Answer 1

由於開始注釋/*!帶有感嘆號，因此它仍然存在/*!

通常，這是在使用開放源代碼庫時要保留的版權說明。