[英]how to get `jQuery` as a function (not as a Module symbol) after ES6 style `import * as jQuery from "./js/jquery.js";`
I'm experimenting with native ES6 modules support in Chrome.我正在尝试在 Chrome 中使用原生 ES6 模块支持。 jQuery is not es6 module (no export) - I know.
jQuery 不是 es6 模块(无导出)——我知道。 Still, trying to understand what does it mean for us.
尽管如此,还是试图了解这对我们意味着什么。
This works without errors:这工作没有错误:
<script type="module">
import * as jQuery from "./js/jquery.js";
window.console.log(jQuery);
</script>
But of course jQuery
thereis not a function but a Module
symbol.但是当然
jQuery
不是一个函数而是一个Module
符号。 The question is: is it possible to extract jQuery/$ function from jQuery module?问题是:是否可以从 jQuery 模块中提取 jQuery/$ 函数? When there are no exports defined on module?
当模块上没有定义导出时?
So do we have a method to extract not exported function from Module in Chrome (as we have it eg in browserfy)?那么我们是否有一种方法可以从 Chrome 中的模块中提取未导出的函数(就像我们在 browserfy 中拥有的那样)?
PS I have made an stupid error ("as jQuery" <-> "as jQyery") but it changes nothing, it is only alias name. PS我犯了一个愚蠢的错误(“as jQuery”<->“as jQyery”)但它什么也没改变,它只是别名。
This:这个:
<script type="module">
import "./js/jquery.js";
window.console.log(window.$);
</script>
creates jQuery on window as "side effect".在窗口上创建 jQuery 作为“副作用”。 JQuery code
查询代码
( function( global, factory ) {
"use strict";
if (typeof module === "object" && typeof module.exports === "object") {
// ...
} else {
// we are there when loading as ES6 native module
factory( global );
}
} )( typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
// ... jquery code
});
There is some specific in this and the same behaviour can't be expected from all "legacy" scripts.这有一些特定的,并且不能从所有“遗留”脚本中期望相同的行为。
What is interesting next also works (my explaination: because of "fetching first rule")接下来有趣的事情也有效(我的解释:因为“获取第一条规则”)
<script type="module">
window.console.log(window.$); // also works and will return $ function even if import is declared bellow
import "./js/jquery.js";
</script>
Syntax import "module-name"
described there https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import语法
import "module-name"
在那里描述https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import
Google article: https://developers.google.com/web/fundamentals/primers/modules谷歌文章: https : //developers.google.com/web/fundamentals/primers/modules
Also this loads jquery ONLY ONCE (and execute it ONLY ONCE):这也只加载 jquery 一次(并且只执行一次):
<script type="module">
import("./js/jquery.js").then(
function(){
window.console.log("inline 2a = " + window.$);
}
);
</script>
<script type="module">
import("./js/jquery.js").then(
function(){
window.console.log("inline 2b = " + window.$);
}
);
</script>
This is important feature that can be used in development.这是可以在开发中使用的重要功能。
PS聚苯乙烯
This works also but has its trap:这也有效,但有其陷阱:
<script type="module">
import * as jQuery from "./js/jquery.js"
window.console.log(jQuery); // returns Module
window.console.log(window.jQuery); // returns jQuery function
</script type="module">
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.