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上代码:
import * as ute from 'bbbb';
console.log(ute.cube(65,2));
console.log(ute.func1f(89));
bbbb:
export {cube,addX1,addX2,addX3,addX4} from './Math.js';
export {ut_a} from './ut.js';
Math.js:
export function square(x) {return x * x;}
export function cube(x) {return x * x * x* eval('addX3')();}
export function addX1(x) {return x + Math.random() * 1111111111;
}
export function addX2(x) {return x + Math.random() * 2222222222;
}
export function addX3(x) {return x + Math.random() * 3333333333;
}
export function addX4(x) {return x + Math.random() * 45444444444;
}
经过 WEBPACK 处理后,变成如下:
(window["webpackJsonp"] = window["webpackJsonp"] || []).push([["zpageATS"],{
/***/ "./node_modules/bbbb/Math.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
/* unused harmony export square */
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() {return cube;});
/* unused harmony export addX1 */
/* unused harmony export addX2 */
/* unused harmony export addX3 */
/* unused harmony export addX4 */
function square(x) {return x * x;}
function cube(x) {return x * x * x* eval('addX3')();}
function addX1(x) {return x + Math.random() * 1111111111;
}
function addX2(x) {return x + Math.random() * 2222222222;
}
function addX3(x) {return x + Math.random() * 3333333333;
}
function addX4(x) {return x + Math.random() * 45444444444;
}
/***/ }),
/***/ "./node_modules/bbbb/index.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
/*import * as ute from './Math.js';
export {ute};*/
/***/ }),
/***/ "./pageATS.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var bbbb__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("./node_modules/bbbb/Math.js");
/* harmony import */ var bbbb__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__("./node_modules/bbbb/index.js");
console.log(bbbb__WEBPACK_IMPORTED_MODULE_0__[/* cube */ "a"](65,2));
console.log(bbbb__WEBPACK_IMPORTED_MODULE_1__["func1f"](89));
/***/ })
},[["./pageATS.js","pageInit"]]]);
TERSER 后:
(window.webpackJsonp = window.webpackJsonp || []).push([["zpageATS"], {"./node_modules/bbbb/Math.js": function(module, __webpack_exports__, __webpack_require__) {
"use strict";
function square(n) {return n * n}
function cube(x) {return x * x * x * eval("addX3")()}
function addX1(n) {return n + 1111111111 * Math.random()
}
function addX2(n) {return n + 2222222222 * Math.random()
}
function addX3(n) {return n + 3333333333 * Math.random()
}
function addX4(n) {return n + 45444444444 * Math.random()
}
__webpack_require__.d(__webpack_exports__, "a", (function() {return cube}))
},
"./node_modules/bbbb/index.js": function(n, e, o) {},
"./pageATS.js": function(n, e, o) {
"use strict";
o.r(e);
var u = o("./node_modules/bbbb/Math.js"),
a = o("./node_modules/bbbb/index.js");
console.log(u.a(65, 2)), console.log(a.func1f(89))
}
},
[["./pageATS.js", "pageInit"]
]
]);
肉眼可见有代码并没有被 shaking 掉
而如果 Math.js: 换成这个呢?
export function square(x) {return x * x;}
export function cube(x) {return x * x * x* 67;}
export function addX1(x) {return x + Math.random() * 1111111111;
}
export function addX2(x) {return x + Math.random() * 2222222222;
}
export function addX3(x) {return x + Math.random() * 3333333333;
}
export function addX4(x) {return x + Math.random() * 45444444444;
}
TERSER 前:
(window["webpackJsonp"] = window["webpackJsonp"] || []).push([["zpageATS"],{
/***/ "./node_modules/bbbb/Math.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
/* unused harmony export square */
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() {return cube;});
/* unused harmony export addX1 */
/* unused harmony export addX2 */
/* unused harmony export addX3 */
/* unused harmony export addX4 */
function square(x) {return x * x;}
function cube(x) {return x * x * x* 67;}
function addX1(x) {return x + Math.random() * 1111111111;
}
function addX2(x) {return x + Math.random() * 2222222222;
}
function addX3(x) {return x + Math.random() * 3333333333;
}
function addX4(x) {return x + Math.random() * 45444444444;
}
/***/ }),
/***/ "./node_modules/bbbb/index.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
/*import * as ute from './Math.js';
export {ute};*/
/***/ }),
/***/ "./pageATS.js":
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var bbbb__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("./node_modules/bbbb/Math.js");
/* harmony import */ var bbbb__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__("./node_modules/bbbb/index.js");
console.log(bbbb__WEBPACK_IMPORTED_MODULE_0__[/* cube */ "a"](65,2));
console.log(bbbb__WEBPACK_IMPORTED_MODULE_1__["func1f"](89));
/***/ })
},[["./pageATS.js","pageInit"]]]);
TERSER 后:
(window.webpackJsonp = window.webpackJsonp || []).push([["zpageATS"], {"./node_modules/bbbb/Math.js": function(n, o, e) {
"use strict";
function s(n) {return n * n * n * 67}
e.d(o, "a", (function() {return s}))
},
"./node_modules/bbbb/index.js": function(n, o, e) {},
"./pageATS.js": function(n, o, e) {
"use strict";
e.r(o);
var s = e("./node_modules/bbbb/Math.js"),
b = e("./node_modules/bbbb/index.js");
console.log(s.a(65, 2)), console.log(b.func1f(89))
}
},
[["./pageATS.js", "pageInit"]
]
]);
可见该移除的都已经被完美移除了,
差别就在这里:
正文完
发表至: javascript
2019-10-17