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This is a simple example that shows the usage of WebAssembly.
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WebAssembly modules can be imported like other async modules with `import` or `import()` .
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When importing, they are downloaded and instantiated in a streaming way.
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# example.js
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```javascript
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import { add } from "./add.wasm";
import {
add as mathAdd,
factorial,
factorialJavascript,
fibonacci,
fibonacciJavascript
} from "./math";
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console.log(add(22, 2200));
console.log(mathAdd(10, 101));
console.log(factorial(15));
console.log(factorialJavascript(15));
console.log(fibonacci(15));
console.log(fibonacciJavascript(15));
timed("wasm factorial", () => factorial(1500));
timed("js factorial", () => factorialJavascript(1500));
timed("wasm fibonacci", () => fibonacci(22));
timed("js fibonacci", () => fibonacciJavascript(22));
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function timed(name, fn) {
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if (!console.time || !console.timeEnd) return fn();
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// warmup
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for (var i = 0; i < 10 ; i + + ) fn ( ) ;
console.time(name);
for (var i = 0; i < 5000 ; i + + ) fn ( ) ;
console.timeEnd(name);
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}
```
# math.js
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```javascript
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import { add } from "./add.wasm";
import { factorial } from "./factorial.wasm";
import { fibonacci } from "./fibonacci.wasm";
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export { add, factorial, fibonacci };
export function factorialJavascript(i) {
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if (i < 1 ) return 1 ;
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return i * factorialJavascript(i - 1);
}
export function fibonacciJavascript(i) {
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if (i < 2 ) return 1 ;
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return fibonacciJavascript(i - 1) + fibonacciJavascript(i - 2);
}
```
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# dist/output.js
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```javascript
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/******/ (() => { // webpackBootstrap
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/******/ "use strict";
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/******/ var __webpack_modules__ = ([
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/* 0 */
/*!********************!*\
!*** ./example.js ** *!
\********************/
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/*! namespace exports */
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/*! exports [not provided] [no usage info] */
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/*! runtime requirements: __webpack_require__ , __webpack_require__ .r, __webpack_exports__ , module, __webpack_require__ .a, __webpack_require__ .* */
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/***/ ((module, __webpack_exports__ , __webpack_require__ ) => {
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__webpack_require__.a(module, async (__webpack_handle_async_dependencies__, __webpack_async_result__ ) => { try {
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__webpack_require__.r(__webpack_exports__);
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/* harmony import */ var _add_wasm__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/* ! ./add.wasm */ 1);
/* harmony import */ var _math__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/* ! ./math */ 2);
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var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__ ([_add_wasm__WEBPACK_IMPORTED_MODULE_0__, _math__WEBPACK_IMPORTED_MODULE_1__]);
([_add_wasm__WEBPACK_IMPORTED_MODULE_0__, _math__WEBPACK_IMPORTED_MODULE_1__] = __webpack_async_dependencies__ .then ? (await __webpack_async_dependencies__ )() : __webpack_async_dependencies__ );
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console.log((0,_add_wasm__WEBPACK_IMPORTED_MODULE_0__.add)(22, 2200));
console.log((0,_math__WEBPACK_IMPORTED_MODULE_1__.add)(10, 101));
console.log((0,_math__WEBPACK_IMPORTED_MODULE_1__.factorial)(15));
console.log((0,_math__WEBPACK_IMPORTED_MODULE_1__.factorialJavascript)(15));
console.log((0,_math__WEBPACK_IMPORTED_MODULE_1__.fibonacci)(15));
console.log((0,_math__WEBPACK_IMPORTED_MODULE_1__.fibonacciJavascript)(15));
timed("wasm factorial", () => (0,_math__WEBPACK_IMPORTED_MODULE_1__.factorial)(1500));
timed("js factorial", () => (0,_math__WEBPACK_IMPORTED_MODULE_1__.factorialJavascript)(1500));
timed("wasm fibonacci", () => (0,_math__WEBPACK_IMPORTED_MODULE_1__.fibonacci)(22));
timed("js fibonacci", () => (0,_math__WEBPACK_IMPORTED_MODULE_1__.fibonacciJavascript)(22));
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function timed(name, fn) {
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if (!console.time || !console.timeEnd) return fn();
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// warmup
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for (var i = 0; i < 10 ; i + + ) fn ( ) ;
console.time(name);
for (var i = 0; i < 5000 ; i + + ) fn ( ) ;
console.timeEnd(name);
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}
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__webpack_async_result__();
} catch(e) { __webpack_async_result__ (e); } });
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/***/ }),
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/* 1 */
/*!******************!*\
!*** ./add.wasm ** *!
\******************/
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/*! namespace exports */
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/*! export add [provided] [no usage info] [provision prevents renaming (no use info)] */
/*! other exports [not provided] [no usage info] */
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/*! runtime requirements: module, module.id, __webpack_exports__ , __webpack_require__ .v, __webpack_require__ .* */
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/***/ ((module, exports, __webpack_require__ ) => {
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module.exports = __webpack_require__ .v(exports, module.id, "0eaeab8b9fa3cef100d1");
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/***/ }),
/* 2 */
/*!*****************!*\
!*** ./math.js ** *!
\*****************/
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/*! namespace exports */
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/*! export add [provided] [no usage info] [missing usage info prevents renaming] -> ./add.wasm .add */
/*! export factorial [provided] [no usage info] [missing usage info prevents renaming] -> ./factorial.wasm .factorial */
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/*! export factorialJavascript [provided] [no usage info] [missing usage info prevents renaming] */
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/*! export fibonacci [provided] [no usage info] [missing usage info prevents renaming] -> ./fibonacci.wasm .fibonacci */
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/*! export fibonacciJavascript [provided] [no usage info] [missing usage info prevents renaming] */
/*! other exports [not provided] [no usage info] */
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/*! runtime requirements: __webpack_require__ , __webpack_exports__ , __webpack_require__ .d, __webpack_require__ .r, module, __webpack_require__ .a, __webpack_require__ .* */
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/***/ ((module, __webpack_exports__ , __webpack_require__ ) => {
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__webpack_require__.a(module, async (__webpack_handle_async_dependencies__, __webpack_async_result__ ) => { try {
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__webpack_require__.r(__webpack_exports__);
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/* harmony export */ __webpack_require__ .d(__webpack_exports__, {
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/* harmony export */ add: () => (/* reexport safe */ _add_wasm__WEBPACK_IMPORTED_MODULE_0__.add),
/* harmony export */ factorial: () => (/* reexport safe */ _factorial_wasm__WEBPACK_IMPORTED_MODULE_1__.factorial),
/* harmony export */ factorialJavascript: () => (/* binding */ factorialJavascript),
/* harmony export */ fibonacci: () => (/* reexport safe */ _fibonacci_wasm__WEBPACK_IMPORTED_MODULE_2__.fibonacci),
/* harmony export */ fibonacciJavascript: () => (/* binding */ fibonacciJavascript)
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/* harmony export */ });
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/* harmony import */ var _add_wasm__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/* ! ./add.wasm */ 1);
/* harmony import */ var _factorial_wasm__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/* ! ./factorial.wasm */ 3);
/* harmony import */ var _fibonacci_wasm__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/* ! ./fibonacci.wasm */ 4);
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var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__ ([_add_wasm__WEBPACK_IMPORTED_MODULE_0__, _factorial_wasm__WEBPACK_IMPORTED_MODULE_1__, _fibonacci_wasm__WEBPACK_IMPORTED_MODULE_2__]);
([_add_wasm__WEBPACK_IMPORTED_MODULE_0__, _factorial_wasm__WEBPACK_IMPORTED_MODULE_1__, _fibonacci_wasm__WEBPACK_IMPORTED_MODULE_2__] = __webpack_async_dependencies__ .then ? (await __webpack_async_dependencies__ )() : __webpack_async_dependencies__ );
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function factorialJavascript(i) {
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if (i < 1 ) return 1 ;
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return i * factorialJavascript(i - 1);
}
function fibonacciJavascript(i) {
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if (i < 2 ) return 1 ;
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return fibonacciJavascript(i - 1) + fibonacciJavascript(i - 2);
}
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__webpack_async_result__();
} catch(e) { __webpack_async_result__ (e); } });
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/***/ }),
/* 3 */
/*!************************!*\
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!*** ./factorial.wasm ** *!
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\************************/
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/*! namespace exports */
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/*! export factorial [provided] [no usage info] [provision prevents renaming (no use info)] */
/*! other exports [not provided] [no usage info] */
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/*! runtime requirements: module, module.id, __webpack_exports__ , __webpack_require__ .v, __webpack_require__ .* */
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/***/ ((module, exports, __webpack_require__ ) => {
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module.exports = __webpack_require__ .v(exports, module.id, "35a58b7c95860d720a3c");
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/***/ }),
/* 4 */
/*!************************!*\
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!*** ./fibonacci.wasm ** *!
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\************************/
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/*! namespace exports */
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/*! export fibonacci [provided] [no usage info] [provision prevents renaming (no use info)] */
/*! other exports [not provided] [no usage info] */
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/*! runtime requirements: module, module.id, __webpack_exports__ , __webpack_require__ .v, __webpack_require__ .* */
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/***/ ((module, exports, __webpack_require__ ) => {
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module.exports = __webpack_require__ .v(exports, module.id, "5a6637e8d63cdf9c72da");
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/***/ })
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/******/ ]);
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```
< details > < summary > < code > /* webpack runtime code */< / code > < / summary >
``` js
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/************************************************************************/
/******/ // The module cache
/******/ var __webpack_module_cache__ = {};
/******/
/******/ // The require function
/******/ function __webpack_require__ (moduleId) {
/******/ // Check if module is in cache
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/******/ var cachedModule = __webpack_module_cache__ [moduleId];
/******/ if (cachedModule !== undefined) {
/******/ return cachedModule.exports;
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/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = __webpack_module_cache__ [moduleId] = {
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/******/ id: moduleId,
/******/ // no module.loaded needed
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/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ __webpack_modules__ [moduleId ](module, module.exports, __webpack_require__ );
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/************************************************************************/
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/******/ /* webpack/runtime/async module */
/******/ (() => {
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/******/ var hasSymbol = typeof Symbol === "function";
/******/ var webpackQueues = hasSymbol ? Symbol("webpack queues") : "__webpack_queues__";
/******/ var webpackExports = hasSymbol ? Symbol("webpack exports") : "__webpack_exports__";
/******/ var webpackError = hasSymbol ? Symbol("webpack error") : "__webpack_error__";
/******/
/******/
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/******/ var resolveQueue = (queue) => {
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/******/ if(queue & & queue.d < 1 ) {
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/******/ queue.d = 1;
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/******/ queue.forEach((fn) => (fn.r--));
/******/ queue.forEach((fn) => (fn.r-- ? fn.r++ : fn()));
/******/ }
/******/ }
/******/ var wrapDeps = (deps) => (deps.map((dep) => {
/******/ if(dep !== null & & typeof dep === "object") {
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/******/
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/******/ if(dep[webpackQueues]) return dep;
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/******/ if(dep.then) {
/******/ var queue = [];
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/******/ queue.d = 0;
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/******/ dep.then((r) => {
/******/ obj[webpackExports] = r;
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/******/ resolveQueue(queue);
/******/ }, (e) => {
/******/ obj[webpackError] = e;
/******/ resolveQueue(queue);
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/******/ });
/******/ var obj = {};
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/******/
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/******/ obj[webpackQueues] = (fn) => (fn(queue));
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/******/ return obj;
/******/ }
/******/ }
/******/ var ret = {};
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/******/ ret[webpackQueues] = x => {};
/******/ ret[webpackExports] = dep;
/******/ return ret;
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/******/ }));
/******/ __webpack_require__ .a = (module, body, hasAwait) => {
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/******/ var queue;
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/******/ hasAwait & & ((queue = []).d = -1);
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/******/ var depQueues = new Set();
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/******/ var exports = module.exports;
/******/ var currentDeps;
/******/ var outerResolve;
/******/ var reject;
/******/ var promise = new Promise((resolve, rej) => {
/******/ reject = rej;
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/******/ outerResolve = resolve;
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/******/ });
/******/ promise[webpackExports] = exports;
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/******/ promise[webpackQueues] = (fn) => (queue & & fn(queue), depQueues.forEach(fn), promise["catch"](x => {}));
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/******/ module.exports = promise;
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/******/ var handle = (deps) => {
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/******/ currentDeps = wrapDeps(deps);
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/******/ var fn;
/******/ var getResult = () => (currentDeps.map((d) => {
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/******/
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/******/ if(d[webpackError]) throw d[webpackError];
/******/ return d[webpackExports];
/******/ }))
/******/ var promise = new Promise((resolve) => {
/******/ fn = () => (resolve(getResult));
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/******/ fn.r = 0;
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/******/ var fnQueue = (q) => (q !== queue & & !depQueues.has(q) & & (depQueues.add(q), q & & !q.d & & (fn.r++, q.push(fn))));
/******/ currentDeps.map((dep) => (dep[webpackQueues](fnQueue)));
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/******/ });
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/******/ return fn.r ? promise : getResult();
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/******/ }
/******/ var done = (err) => ((err ? reject(promise[webpackError] = err) : outerResolve(exports)), resolveQueue(queue))
/******/ body(handle, done);
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/******/ queue & & queue.d < 0 & & ( queue . d = 0);
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/******/ };
/******/ })();
/******/
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/******/ /* webpack/runtime/define property getters */
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/******/ (() => {
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/******/ // define getter functions for harmony exports
/******/ __webpack_require__ .d = (exports, definition) => {
/******/ for(var key in definition) {
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/******/ if(__webpack_require__.o(definition, key) & & !__webpack_require__.o(exports, key)) {
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/******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ }
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/******/ }
/******/ };
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/******/ })();
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/******/
2020-05-21 05:26:51 +08:00
/******/ /* webpack/runtime/hasOwnProperty shorthand */
/******/ (() => {
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/******/ __webpack_require__ .o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
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/******/ })();
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/******/
2020-08-04 20:15:08 +08:00
/******/ /* webpack/runtime/make namespace object */
/******/ (() => {
/******/ // define __esModule on exports
/******/ __webpack_require__ .r = (exports) => {
/******/ if(typeof Symbol !== 'undefined' & & Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/ })();
/******/
2021-08-20 14:12:50 +08:00
/******/ /* webpack/runtime/wasm loading */
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/******/ (() => {
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/******/ __webpack_require__ .v = (exports, wasmModuleId, wasmModuleHash, importsObj) => {
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/******/
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/******/ var req = fetch(__webpack_require__.p + "" + wasmModuleHash + ".wasm");
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/******/ var fallback = () => (req
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/******/ .then((x) => (x.arrayBuffer()))
/******/ .then((bytes) => (WebAssembly.instantiate(bytes, importsObj)))
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/******/ .then((res) => (Object.assign(exports, res.instance.exports))));
/******/ return req.then((res) => {
/******/ if (typeof WebAssembly.instantiateStreaming === "function") {
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/******/
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/******/ return WebAssembly.instantiateStreaming(res, importsObj)
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/******/ .then(
/******/ (res) => (Object.assign(exports, res.instance.exports)),
/******/ (e) => {
/******/ if(res.headers.get("Content-Type") !== "application/wasm") {
/******/ console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
/******/ return fallback();
/******/ }
/******/ throw e;
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/******/ }
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/******/ );
2024-01-27 13:08:59 +08:00
/******/ }
/******/ return fallback();
/******/ });
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/******/ };
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/******/ })();
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/******/
2021-08-20 14:12:50 +08:00
/******/ /* webpack/runtime/publicPath */
/******/ (() => {
/******/ __webpack_require__ .p = "dist/";
/******/ })();
/******/
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/************************************************************************/
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```
< / details >
``` js
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/******/
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/******/ // startup
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/******/ // Load entry module and return exports
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/******/ // This entry module used 'module' so it can't be inlined
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/******/ var __webpack_exports__ = __webpack_require__ (0);
/******/
2019-10-11 05:11:05 +08:00
/******/ })()
;
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```
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# Info
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## Unoptimized
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```
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asset output.js 13.3 KiB [emitted] (name: main)
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asset 5a6637e8d63cdf9c72da.wasm 67 bytes [emitted] [immutable] (auxiliary name: main)
asset 35a58b7c95860d720a3c.wasm 62 bytes [emitted] [immutable] (auxiliary name: main)
asset 0eaeab8b9fa3cef100d1.wasm 41 bytes [emitted] [immutable] (auxiliary name: main)
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chunk (runtime: main) output.js (main) 1.27 KiB (javascript) 170 bytes (webassembly) 3.72 KiB (runtime) [entry] [rendered]
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> ./example.js main
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runtime modules 3.72 KiB 6 modules
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dependent modules 552 bytes (javascript) 170 bytes (webassembly) [dependent] 4 modules
./example.js 753 bytes [built] [code generated]
[no exports]
[used exports unknown]
entry ./example.js main
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webpack X.X.X compiled successfully
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```
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## Production mode
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```
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asset output.js 2.8 KiB [emitted] [minimized] (name: main)
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asset 93de874acf2fa7def7d9.wasm 67 bytes [emitted] [immutable] (auxiliary name: main)
asset 5055869d769f484de216.wasm 62 bytes [emitted] [immutable] (auxiliary name: main)
asset db91ebd6538fd6985888.wasm 41 bytes [emitted] [immutable] (auxiliary name: main)
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chunk (runtime: main) output.js (main) 1.27 KiB (javascript) 170 bytes (webassembly) 3.45 KiB (runtime) [entry] [rendered]
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> ./example.js main
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runtime modules 3.45 KiB 5 modules
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dependent modules 552 bytes (javascript) 170 bytes (webassembly) [dependent] 4 modules
./example.js 753 bytes [built] [code generated]
[no exports]
[no exports used]
entry ./example.js main
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webpack X.X.X compiled successfully
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```
