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1 <!-- Feature template markdown: | 1 <!-- Feature template markdown: |
2 ## Header | 2 ## Header |
3 | 3 |
4 **Usage Example:** | 4 **Usage Example:** |
5 | 5 |
6 ```js | 6 ```js |
7 | 7 |
8 ``` | 8 ``` |
9 | 9 |
10 **Documentation:** [link]() | 10 **Documentation:** [link]() |
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176 ``` | 176 ``` |
177 | 177 |
178 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-pr omise-objects) | 178 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-pr omise-objects) |
179 [link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_ Objects/Promise) | 179 [link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_ Objects/Promise) |
180 | 180 |
181 **Discussion Notes:** Feature already extensively used prior to creation of | 181 **Discussion Notes:** Feature already extensively used prior to creation of |
182 this document. | 182 this document. |
183 | 183 |
184 --- | 184 --- |
185 | 185 |
186 ## Classes | |
187 | |
188 OOP-style and boilerplate-free class syntax, including inheritance, `super()`, | |
189 static members, and getters and setters. | |
190 | |
191 **Usage Example:** | |
192 | |
193 ```js | |
194 class Shape { | |
195 constructor(x, y) { | |
196 this.x = x; | |
197 this.y = y; | |
198 } | |
199 } | |
200 // Note: let Shape = class {...}; is also valid. | |
201 | |
202 class Rectangle extends Shape { | |
203 constructor(x, y, width, height) { | |
204 super(id, x, y); | |
205 this.width = width; | |
206 this.height = height; | |
207 } | |
208 | |
209 static goldenRectangle() { | |
210 var PHI = (1 + Math.sqrt(5)) / 2; | |
211 return new Rectangle(0, 0, PHI, 1); | |
212 } | |
213 } | |
214 ``` | |
215 | |
216 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-cl ass-definitions) | |
217 | |
218 **Discussion Notes / Link to Thread:** | |
219 https://groups.google.com/a/chromium.org/d/msg/chromium-dev/S1h-0m2ohOw/jyaiMGDl CwAJ | |
220 | |
221 **Note**: => does not work in iOS9. Don't use it in code that runs on Chrome fo r | |
PhistucK
2017/06/16 14:53:09
Remove "=>".
(Or replace with "classes")
dpapad
2017/06/16 18:09:24
Done.
| |
222 iOS, unless you can verify it works. | |
223 | |
224 --- | |
225 | |
186 # Banned Features | 226 # Banned Features |
187 | 227 |
188 The following features are banned for Chromium development. | 228 The following features are banned for Chromium development. |
189 | 229 |
190 # Features To Be Discussed | 230 # Features To Be Discussed |
191 | 231 |
192 The following features are currently disallowed. See the top of this page on | 232 The following features are currently disallowed. See the top of this page on |
193 how to propose moving a feature from this list into the allowed or banned | 233 how to propose moving a feature from this list into the allowed or banned |
194 sections. | 234 sections. |
195 | 235 |
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257 ``` | 297 ``` |
258 | 298 |
259 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-le t-and-const-declarations) | 299 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-le t-and-const-declarations) |
260 | 300 |
261 **See also:** [Object.freeze()](https://developer.mozilla.org/en-US/docs/Web/Jav aScript/Reference/Global_Objects/Object/freeze) | 301 **See also:** [Object.freeze()](https://developer.mozilla.org/en-US/docs/Web/Jav aScript/Reference/Global_Objects/Object/freeze) |
262 | 302 |
263 **Discussion Notes / Link to Thread:** | 303 **Discussion Notes / Link to Thread:** |
264 | 304 |
265 --- | 305 --- |
266 | 306 |
267 ## Classes | |
268 | |
269 OOP-style and boilerplate-free class syntax, including inheritance, `super()`, | |
270 static members, and getters and setters. | |
271 | |
272 **Usage Example:** | |
273 | |
274 ```js | |
275 class Shape { | |
276 constructor(x, y) { | |
277 this.x = x; | |
278 this.y = y; | |
279 } | |
280 } | |
281 // Note: let Shape = class {...}; is also valid. | |
282 | |
283 class Rectangle extends Shape { | |
284 constructor(x, y, width, height) { | |
285 super(id, x, y); | |
286 this.width = width; | |
287 this.height = height; | |
288 } | |
289 | |
290 static goldenRectangle() { | |
291 var PHI = (1 + Math.sqrt(5)) / 2; | |
292 return new Rectangle(0, 0, PHI, 1); | |
293 } | |
294 } | |
295 ``` | |
296 | |
297 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-cl ass-definitions) | |
298 | |
299 **Discussion Notes / Link to Thread:** | |
300 | |
301 --- | |
302 | |
303 ## Block Scope Functions | 307 ## Block Scope Functions |
304 | 308 |
305 **Usage Example:** | 309 **Usage Example:** |
306 | 310 |
307 ```js | 311 ```js |
308 { | 312 { |
309 function foo() { | 313 function foo() { |
310 return 1; | 314 return 1; |
311 } | 315 } |
312 // foo() === 1 | 316 // foo() === 1 |
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954 | 958 |
955 ```js | 959 ```js |
956 // See Doc | 960 // See Doc |
957 ``` | 961 ``` |
958 | 962 |
959 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-ma th) | 963 **Documentation:** [link](http://www.ecma-international.org/ecma-262/6.0/#sec-ma th) |
960 | 964 |
961 **Discussion Notes / Link to Thread:** | 965 **Discussion Notes / Link to Thread:** |
962 | 966 |
963 --- | 967 --- |
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