1.6ãŸãã¯2.0ã§ïŒ
äœãæ¢ããŠããã®ãããããªãã ã¿ã€ãã³ã°ãæå³ããå Žåã¯ãlib.es6.d.tsã§ãã§ã«æ¬¡ã®ããã«å®çŸ©ãããŠããŸãã
/**
* Copy the values of all of the enumerable own properties from one or more source objects to a
* target object. Returns the target object.
* <strong i="6">@param</strong> target The target object to copy to.
* <strong i="7">@param</strong> sources One or more source objects to copy properties from.
*/
assign(target: any, ...sources: any[]): any;
ã€ãŸããå®è£ ãæå³ããŸããTypeScriptã«ã¯ããªãã£ã«ãå«ãŸããŠããŸããããã€ã§ãèªåã®ãã®ãå«ããããšãã§ããŸããããšãã°ãMozillaã«ã¯ããªãã£ã«ããããŸãã
ããã¯ã¹ã€ã³ãã¿ãŒã³ã®ã¿ã€ãã³ã°ã«ã€ããŠè³ªåããŠããå Žåãããã¯2.0ã®ããŒããããã§åžžã«æã£ãŠãããã®ã§ãã
ããããšãã es3 / es5 / es6ã«ãã©ã³ã¹ãã€ã«ããTypeScriptã§Object.assign(...)
ãæžãããšãæå³ããŸãã ã€ãŸãã2.0ã®ããŒããããã«ãããŸãã
ïŒ+1ïŒ
@unionalç§ã¯äœãã誀解ãããããããŸããã ããããç§ã¯ããªãã®çµè«ãæ£ãããšã¯æããŸããã
ES6ã¯ãšã«ããObject.assign
ãµããŒãããŠããã®ã§ãã¿ãŒã²ãããES6ã§ããã°ããšã«ããTypeScriptã§èšè¿°ã§ããã¯ãã§ãã
ãã ãães5以äžã«ãã©ã³ã¹ãã€ã«ããå Žåã§ãães5ã«ã¯Object.assign
ããªããããããªãã£ã«ãå¿
èŠã«ãªããŸãã
ç°¡åãªåé¿çãšããŠããã®ããªãã£ã«ãšå ¥åãæ€èšããŠãã ããã
interface ObjectConstructor {
assign(target: any, ...sources: any[]): any;
}
if (typeof Object.assign != 'function') {
(function () {
Object.assign = function (target) {
'use strict';
if (target === undefined || target === null) {
throw new TypeError('Cannot convert undefined or null to object');
}
var output = Object(target);
for (var index = 1; index < arguments.length; index++) {
var source = arguments[index];
if (source !== undefined && source !== null) {
for (var nextKey in source) {
if (source.hasOwnProperty(nextKey)) {
output[nextKey] = source[nextKey];
}
}
}
}
return output;
};
})();
}
ãã®åé¡ãæãäžããŠãããŠããããšãã ããªãåã®ããšã§ãã :)ã¯ãães5ã®ããªãã£ã«ãå¿ èŠãªã ãã ãšç解ããŸããã
å床ãæè¬ããŸãïŒ
targetães5ã«èšå®ãããŠããå Žåããã®ããªãã£ã«ãã³ã³ãã€ã«ããŸããïŒ ã€ãŸããã³ã³ãã€ã«ã¿ãŒã²ããães5ã«èšå®ãããŠããã®ã§ãããã¯es5ç°å¢ã§æ©èœããã¯ãã§ãã
ã¿ãŒã²ããães5ã«èšå®ãããŠããå Žåããã®ããªãã£ã«ãã³ã³ãã€ã«ããŸããïŒ
ã¯ãããããŒãã£ã«ãšããŠïŒrose ïŒïŒ horseïŒ
ããããªããŠããããªããã ES6ã¯Object.assign
ãµããŒãããŠãããããBabelã¯ãããES5ã¿ãŒã²ããã®ããªãã£ã«ã«å€æããŸãã TypeScriptãä»ã®ES6æ©èœã®å Žåãšåãããã«æ©èœããªãã®ã¯ãªãããç§ã¯æ··ä¹±ããŠããŸãã
@prashaantt TypeScriptã¯ããªãã£ã«ãæäŸãããä»æ§ã«ãããã®ã§ãã Object.assign
ãŸãã¯æ°ããæšæºã«ãã£ãŠè¿œå ããããã®ä»ã®ããªããã£ã/ã¡ãœããã䜿çšããå Žåã¯ã次ã®ãããããè¡ãå¿
èŠããããŸãã
"target": "es6"
ããªãã®äžã«tsconfig.json
ïŒ@ devoto13ããããšãã core-js
ã¯ããŸãæ©èœããŸãã
ã°ããã質åããããŸããã npm install
ingãštypings install
ing core-js
åŸãããªãã£ã«ãããã¡ãœããã®IntelliSenseãååŸãå§ããŸãã ãããããããã䜿çšããŠãããã¹ãŠã®ã¢ãžã¥ãŒã«ã«å®éã«ãããã®ã¡ãœãããã€ã³ããŒãããå¿
èŠããããŸããããããªããšãã³ã³ãã€ã«ãããã³ãŒãã«ããªãã£ã«ãå«ãŸããŸããã
@prashaantt core-js/shim
ãäœãã«å¿
èŠã«ãªããšããã®æç¹ããObject.assign
ãã°ããŒãã«ã«å©çšã§ããããã«ãªããŸãã ã¡ã€ã³ã¢ãžã¥ãŒã«/ãšã³ããªãã€ã³ãã®äžéšã«import 'core-js/shim';
ãé
眮ããããšããå§ãããŸãã
@jesseschalkenã«æè¬ããŸãã ãã©ããŒã¢ãããšããŠã shim
å
šäœãã€ã³ããŒããããšããã³ãã«ãè¥å€§åããã®ã§ã¯ãªãã§ããããã ãããšãã tsc
ãŸãã¯ts-loader
ã¯ãã³ãŒãã§å®éã«äœ¿çšãããŠãããã®ã ããååŸããã®ã«ååè³¢ãã®ã§ããããã
@prashaanttã¿ãŒã²ããã«ããŠãããã©ãŠã¶ã«ãã£ãŠç°ãªããŸãã Object.assign
ãã¿ãŒã²ããã®ãã©ãŠã¶ã§ãµããŒããããŠããªãããšã¯ãã§ã«ãåç¥ã§ããïŒ æãå¹
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èŠãªå Žåã¯ããã³ãã«ã«ã·ã å
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Object.assign
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èŠãªå Žåã¯ã import 'core-js/modules/es6.object.assign';
ãè¿œå ããå¿
èŠã«å¿ããŠè¿œå ããããšãã§ããŸãïŒãªã¹ãã«ã€ããŠã¯ãcore-jsã®shim.js
åç
§ããŠãã ããïŒãããã¥ã¡ã³ãïŒã Webpackã¯requireã°ã©ãã«åŸããå¿
èŠãªã¢ãžã¥ãŒã«ã®ã¿ãå«ã¿ãŸãã
ãã§ã«Babelã䜿çšããŠããå Žåã¯ãcore-jsãçŽæ¥äœ¿çšããã®ã§import 'babel-polyfill';
ãªãã core-js/shim
ã ãã§ãªããgenerators / async-awaitçšã®regenerator-runtime
ããŠããŸãã
ãã³ããããããšãããããŸãããä»ã¯å®å šãªãžã§ãã¬ãŒã¿ãŒããµããŒãããå¿ èŠããããŸãâæåéã2.0ãžã®æåŸã®ããŒãã«ã§ãïŒ
ããããªããŠããããªããã ES6ã¯Object.assignããµããŒãããŠãããããBabelã¯ãããES5ã¿ãŒã²ããã®ããªãã£ã«ã«å€æããŸãã TypeScriptãä»ã®ES6æ©èœã®å Žåãšåãããã«æ©èœããªãã®ã¯ãªãããç§ã¯æ··ä¹±ããŠããŸãã
@prashaantt Babel _transpiles_ Object.assign
ãšã¯ã©ãããæå³ã§ããïŒ ããã¯åãªãæ©èœã§ãã ããªãã£ã«ããããŒãã£ã«ãè¿œå ããããèªåã§äœæããããšãã§ããES 3ã5.1ã6ãªã©ã®ä»»æã®ç°å¢ã§äœ¿çšã§ããŸãã
@aluanhaddad babelã®æ©èœã«ã€ããŠã®ç§ã®ç解ã¯ãã¿ãŒã²ãããšããŠes5ãæå®ããŠObject.assign
ã䜿çšãããšã Object.assign
ããªãã£ã«ãèªåçã«å«ãŸãã䜿çšããªãå Žåã¯å«ãŸããŸããã typescriptãães2015ã®ã¹ãŒããŒã»ãããã§ãããšäž»åŒµããŠããã®ã§ãtypescriptãåãããšããããšããããããã¯çŽ æŽãããããšã§ããããã¯ãå€ãã¿ãŒã²ããã«ãã©ã³ã¹ãã€ã«ããæ©èœãæäŸããªãå Žåã¯å®éã«ã¯åœãŠã¯ãŸããŸããã ïŒç§ã¯ééã£ãŠãããããããŸãããïŒ
@ devoto13ã¿ãŒã²ããã
ããªãã説æãã@kyleholzinger ïŒES5ãã¿ãŒã²ããã«ããããšã¯Object.assignãå©çšã§ããªãããšãæå³ããŸãïŒã¯ãã§ã«åäœããŠããŸãã
@kyleholzinger確ãã«ãšã©ãŒãã¹ããŒããŸãã 次ã®2ã€ã®ãã¡ã€ã«ã§ãã©ã«ããäœæããå ŽåïŒ
// test.ts
let t = Object.assign({}, {});
// tsconfig.json
{ "target": "es5" }
ãããŠããã®äžã§tsc
ãå®è¡ããŸãã 次ã®ãšã©ãŒãçºçããŸãã
$ tsc
test.ts(1,16): error TS2339: Property 'assign' does not exist on type 'ObjectConstructor'.
ãããžã§ã¯ãã«ã¯ãããããããã€ãã®ããªãã£ã«ã®åæå®ãå«ãŸããŠããŸãããããªãã£ã«ã®å®è£ ã¯å«ãŸããŠããŸããããã®ããã倱æããŸãã
ãããçŸåšã®è¡åã ãšç解ããŠããŸãã ç§ã®ãã€ã³ãã¯ãã¿ãŒã²ããães5ãšããŠæå®ããå Žåãtypescriptããã³ã³ã¹ãã©ã¯ã¿ãŒäžã«ãªãã以å€ã«æå³ã®ãããšã©ãŒã衚瀺ãããšãããšããããšã§ãã
@kyleholzinger FWIWãTypeScript 2.1ã¯ES6ïŒES7ïŒïŒãªããžã§ã¯ãã®ã¬ã¹ã/ã¹ãã¬ããããµããŒãããããã«ãªã£ãã®ã§ãå人çã«ã¯Object.assign
ã«ã€ããŠæ°ã«ããçç±ãå°ãªããªããŸããã ãã€ãã£ããžã§ãã¬ãŒã¿ãŒã䜿çšãããšããããšã¯ãã»ãšãã©ã®ãããžã§ã¯ãã§ããªãã£ã«ãå¿
èŠãªãããšãæå³ããŸãã
ããã¯æ¬åœã ã èšèªæ©èœãçç¥ããªãã®ã¯ããããšã§ãã Object.assignããã©ãŠã¶ã«äŸåãããpolyfillã䜿çšããŠããªãå Žåã¯ãtypescriptãèŠåã衚瀺ããã®ã¯çŽ æŽãããããšã§ãã
tsconfigãæ£ããèšå®ãããŠããå ŽåãTypeScriptã¯ãæåã«Object
ã§ãã®é¢æ°åããªãŒãã³ã³ããªãŒããããªãã·ã§ã³ãæäŸããªãããšã«ããã<ES6ã§assign
ã䜿çšã§ããªãããšãèŠåããŸãã æã§äž¹å¿µã«æžãç¶ãããšãèµ€ãæ³¢ç·ãèŠããŸãã ãããç¡èŠãããšã tsc
äžèšã®ãšã©ãŒãçºçããŸãã ããããããªãããããæ
æã«ç¡èŠãããªãã°ãããªãã¯åœç¶ããªãã®éåœã«å€ããã ;ïŒ
ããã§ããç§ã®å¯äžã®ãã€ã³ãã¯es2015ä»æ§ã«ããã®ã§ãtypescriptã«ããå¿ èŠããããŸã;ïŒ
es5
ãã¿ãŒã²ããã«ããªãããããŒãã§Object.assign
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@johnbendi
ããã¯ããŒãã®ããŒãžã§ã³ã«äŸåããŸããã€ãŸãããã¹ãŠã®ããªãã£ã«å¯èœãªæ©èœã®å Žåãšåæ§ã«ãã©ã³ã¿ã€ã ã«äŸåããŸãã
ã©ã³ã¿ã€ã ãObject.assign
ãµããŒãããŠãããã©ããããã¹ãããæ¹æ³ã¯æ¬¡ã®ãšããã§ã
$ Node
> Object.assign({ to: 'world' }, { message: 'Hello there!' })
{ to: 'world', message: 'Hello there!' }
äžèšãæ©èœããå Žåã¯ãtsconfig.jsonã®"compilerOptions"."lib"
ããããã£ã«"es2017.object"
ãå«ããã ãã§ãã
äžèšã倱æããå Žåã¯ãTypeScriptã§èšè¿°ããããã®ãããªããªãã£ã«ãè¿œå ããŸãã
// polyfill-object-assign.ts
if (typeof Object.assign !== 'function') {
Object.assign = function (target, ...args) {
if (!target) {
throw TypeError('Cannot convert undefined or null to object');
}
for (const source of args) {
if (source) {
Object.keys(source).forEach(key => target[key] = source[key]);
}
}
return target;
};
}
ãããŠãããã€ã³ããŒãããŸã
import './polyfill-object-assign';
ãŸããã©ã³ã¿ã€ã ã§ãµããŒããããŠããå Žåãšåãå€æŽãtsconfig.jsonã«å ããŸãã
ã圹ã«ç«ãŠã°å¹žãã§ã
@aluanhaddadã¯æŽå¯ã«æè¬ããŸãã ç§ã®ããŒãã¯ãããªããç§ã«å®è¡ããããã«äŸé Œããå®éšã«åºã¥ããŠã Object.assign
ããµããŒãããŠããŸãã ãããã "compilerOptions": { "lib": ["es2017.object"] }
ãè¿œå ããåŸã§ãã squiggles
ååŸããŸãã ç§ã¯ãããç¡èŠããã¹ãã§ããããããšãããããªããããã«ç§ãã§ããããšããããŸããïŒ
@aluanhaddadã¯æ°ã«ããªãã§ãã ããã ä»ã¯ããŸãæ©èœããŠããŸãã
ç§ã以åæã£ãŠãã@aluanhaddad "compilerOptions": { "lib": ["es2017.object", "es6"] }
ãç§ã¯ãªã£ãŠãããšãã squiggles
ã es6
åé€ãããšè§£æ±ºããããã§ãããgulpã¹ã¯ãªãããåå®è¡ãããšãçªç¶æ°ãããšã©ãŒã»ãããçæãããŸãã
ç§ã®tsconfig.jsonïŒ
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"lib": ["es2017.object"],
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"sourceMap": true,
"inlineSources": true,
//"noImplicitAny": true,
"declaration": true,
"noFallthroughCasesInSwitch": true,
// "noImplicitReturns": true,
"removeComments": true,
"stripInternal": true,
"outDir": "dist"
},
"files": ["src/main.ts"],
"include": [
"src/**/*.ts"
],
"exclude": [
"node_modules"
]
}
ç§ã®æ°ãããšã©ãŒã®ãµã³ãã«ïŒ
error TS2318: Cannot find global type 'Array'.
error TS2318: Cannot find global type 'Boolean'.
error TS2318: Cannot find global type 'Function'.
error TS2318: Cannot find global type 'IArguments'.
error TS2318: Cannot find global type 'Number'.
error TS2318: Cannot find global type 'RegExp'.
error TS2318: Cannot find global type 'String'.
error TS2339: Property 'bind' does not exist on type '(message?: any, ...optionalParams: {}) => void'.
error TS2339: Property 'bind' does not exist on type '(message?: any, ...optionalParams: {}) => void'.
error TS2322: Type '{}' is not assignable to type
error TS2304: Cannot find name 'Promise'.
ããã§ãããªãã®æšèŠã䜿çšããŠãããã§ãtypescriptãæ£ããã³ã³ãã€ã«ããæ¹æ³ã¯ãããŸããïŒ
@johnbendiã¯ãã確ãã«ã
䜿çšç§ã¯ããªãã®èŠæ±ã®ç¹ç°æ§ã®ããã«ç¹å®ã®ãšã³ããª"es2017.object"
ãè¿œå ããããšãåã«ææ¡ããŠããŸããã
"lib": ["es6"]
ã¯ãã¯ãæ£ãããªãã "lib": ["es2015"]
ã§ããã¯ãã ãšæããŸãã
"lib": ["es2015", es2017.object"]
ãŸãã¯"lib": ["es2017"]
è©ŠããŠãã ããã
足ããªãã®ã¯ããç§ã¯es6ããªãã£ã«ãæã£ãŠããŠãããã¯ããªãã®ããžãã¹ã¿ã€ãã¹ã¯ãªããã§ã¯ãããŸãããç§ãããããŠãããšä»®å®ããŠãã ããããšããæ確ãªèšãæ¹ã ãšæããŸã:)ã
ãªããªãã target: "es6"
èšå®ããããšã§ãããå¯èœã«ãªããŸããããããããããªãã£ã«äžå¯èœãªes6æ©èœã䜿çšããŠã³ãŒããçæããããšãã§ããŸãã
core-jsãæ瀺çã«èŠæ±ãããšãåºæ¬çã«ã·ããŒãå¿ èŠã«ãªããŸããTSãæå¥ãèšããããã·ããŒãã«ããšéã·ããŒãã«ãã䜿çšããããšã¯ã§ããŸããã
è¿œå node_modules/typescript/lib/lib.es6.d.ts
ããfiles
ã§tsconfig.json
ããšãè¡ããŸããã...ïŒç§ã¯ãããéæããããã®æ確ãªæ¹æ³ãæ¬ ãããããŠããŸãïŒïŒ...ãšãŠããããã«èŠããŸãã
@himdelã¯ãã 䜿çšããŸã
{
"compilerOptions": {
"lib": [
"es2015"
]
}
}
ããã¯å®ç§ã«æ©èœããŸã-ç§ã¯äœã¶æãããããã£ãŠããŸãã
ãŸãã¯ãå¿ èŠãªãµãã»ããïŒ
{
"compilerOptions": {
"lib": [
"es2015.core",
"es2016.array.include"
]
}
}
ç§ã¯ãŸã ãããè¡ãæ¹æ³ãç解ããããšã¯ã§ããŸããã target: "es5"
ãããå Žåãtscã¯åžžã«Object.assign
ãããªãã£ã«ãžã®åŒã³åºãã«å€æããŸãã libsãè¿œå ããŠããç§ã«ãšã£ãŠã¯äœãå€ãããŸããã
ç§ã®å Žåãç¢å°é¢æ°ãéåžžã®é¢æ°ã«å€æãããã®ã§ããã Object.assign
ãArray.includes
ãªã©ã®éçåŒã³åºãã¯ãã®ãŸãŸã«ããŠãããŸãã
tscã«ã¯ãéçã¡ãœããObject
ã Array
ãªã©ã®ããªãã£ã«æ©èœã§ã¯ãªããæ§ææ©èœã®ã¿ããã©ã³ã¹ãã€ã«ããããã«æ瀺ãããã©ã°ãå¿
èŠã§ãã
ã¿ãŒã²ãããããå ŽåïŒães5ãtscã¯åžžã«Object.assignãããªãã£ã«ãžã®åŒã³åºãã«å€æããŸãã
@danez TypeScriptã¯ã Object.assign
ãžã®åŒã³åºããå€æŽããŸããã Babelãä»ããŠã³ãŒããå®è¡ããŠããããã«èãããŸããïŒ
@RyanCavanaughããã§ãã Babelã¯ãã®ããã»ã¹ã«é¢äžããŠããŸããã
ãããããããšã¯åºæ¬çã«ãããå€æããããšã§ãïŒ
var a = Object.assign({}, {});
ããã«
var __assign = (this && this.__assign) || Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
var a = _assign({}, {});
@danezå®éã®åçŸãæçš¿ã§ããŸããïŒ ã³ã³ãã€ã©ã¯ãã®ã³ãŒããçºè¡ããŸããã§ãã
ç§ã¯ãªããžããªãæã£ãŠããŸããããããã¯tsconfigã§ãïŒ
{
"compilerOptions": {
"noImplicitAny": true,
"strictNullChecks": true,
"module": "ES2015",
"target": "es5",
"outDir": "js/lib/es"
},
"include": [
"js/**/*.ts",
],
"exclude": [
"**/__tests__/**/*.ts"
]
}
ããããç§ã¯åã«tsc
ãšåŒã³ãŸã
@danezå®éã®åçŸãæçš¿ããå¿ èŠãããã®ã§ã¯ãªãããšæããŸãã
C:\Throwaway\oat>type a.ts
var a = Object.assign({}, {});
C:\Throwaway\oat>type tsconfig.json
{
"compilerOptions": {
"noImplicitAny": true,
"strictNullChecks": true,
"module": "ES2015",
"target": "es5",
"outDir": "js/lib/es"
},
"include": [
"*.ts",
]
}
C:\Throwaway\oat>tsc
a.ts(1,16): error TS2339: Property 'assign' does not exist on type 'ObjectConstructor'.
C:\Throwaway\oat>type js\lib\es\a.js
var a = Object.assign({}, {});
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var __assign = (this && this.__assign) || Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
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