JavaScript 二十年

第 1 篇　語(yǔ)言誕生
第 1 章　史前時(shí)代 ..................................................................................3
1.1　Brendan Eich 加入網(wǎng)景 ........................................................................4
1.2　Mocha 的故事 ......................................................................................5
第 2 章　JavaScript 1.0 與 1.1................................................................8
2.1　JavaScript 語(yǔ)法 ..................................................................................10
2.2　數(shù)據(jù)類型與表達(dá)式 .............................................................................11
2.3　對(duì)象 ...................................................................................................14
2.4　函數(shù)對(duì)象 ............................................................................................17
2.5　內(nèi)置庫(kù) ...............................................................................................18
2.6　執(zhí)行模型 ............................................................................................20
2.7　迷惑行為與 bug .................................................................................22
2.7.1　冗余聲明 ...............................................................................22
2.7.2　隱式類型轉(zhuǎn)換與 = = 運(yùn)算符 ..................................................23
2.7.3　32 位算術(shù) ..............................................................................23
2.7.4　this 關(guān)鍵字.............................................................................24
2.7.5　arguments 對(duì)象 ......................................................................24
2.7.6　對(duì)數(shù)值屬性鍵的特殊處理 .....................................................25
2.7.7　原始值的屬性 ........................................................................26
2.7.8　JavaScript 中的 HTML 注釋 ..................................................26
xxiv ｜ JavaScript二十年
第 3 章　微軟 JScript ...........................................................................28
第 4 章　從 Mocha 到 SpiderMonkey ....................................................30
第 5 章　插曲 ：風(fēng)評(píng)被害 ......................................................................35
第 2 篇　創(chuàng)立標(biāo)準(zhǔn)
第 6 章　尋找場(chǎng)地 ................................................................................39
第 7 章　首次 TC39 會(huì)議 ......................................................................41
第 8 章　編寫(xiě)規(guī)范 ................................................................................45
第 9 章　命名標(biāo)準(zhǔn) ................................................................................50
第 10 章　ISO 快速通道 .......................................................................52
第 11 章　定義 ECMAScript 3 ..............................................................53
第 12 章　插曲 ：JavaScript 不需要 Java ..............................................63
12.1　布道師 .............................................................................................63
12.2　富互聯(lián)網(wǎng)應(yīng)用與 AJAX ....................................................................64
12.3　瀏覽器博弈論 ..................................................................................67
第 3 篇　改革失敗
第 13 章　不滿于成功 ...........................................................................71
第 14 章　對(duì) ES4 的第一輪嘗試 ............................................................72
第 15 章　另一條死路 ...........................................................................78
第 16 章　Flash 與 ActionScript ...........................................................80
目錄 ｜ xxv
第 17 章　對(duì) ES4 的第二輪嘗試 ............................................................82
17.1　重置 TC39-TG1 ...............................................................................82
17.2　重新設(shè)計(jì) ES4 ..................................................................................83
17.3　阻力 .................................................................................................87
17.4　尋求和諧 ..........................................................................................93
第 18 章　插曲 ：認(rèn)真對(duì)待 JavaScript ................................................. 100
18.1　JavaScript 性能革命 .......................................................................100
18.2　CommonJS 和 Node.js ...................................................................101
18.3　成為瀏覽器通用運(yùn)行時(shí)的 JavaScript.............................................103
第 4 篇　繼往開(kāi)來(lái)
第 19 章　開(kāi)發(fā) ES3.1/ES5 ................................................................. 109
19.1　ES5 技術(shù)設(shè)計(jì) ................................................................................114
19.1.1　嚴(yán)格模式 ...........................................................................114
19.1.2　Getter、Setter 和對(duì)象元操作 .............................................116
19.1.3　對(duì)象的完整性與安全性特性 ..............................................122
19.1.4　活動(dòng)對(duì)象（Activation Object）的移除 .............................125
19.1.5　其他 ES5 特性 ...................................................................126
19.2　實(shí)現(xiàn)與測(cè)試 ....................................................................................127
第 20 章　從 Harmony 到 ECMAScript 2015 ....................................... 130
20.1　開(kāi)始投入 Harmony ........................................................................130
20.1.1　稻草人（Strawman）與目標(biāo) .............................................130
20.1.2　倡導(dǎo)者模型 ........................................................................132
20.1.3　選擇特性集 ........................................................................132
20.1.4　開(kāi)始編寫(xiě)規(guī)范 ....................................................................133
20.1.5　One JavaScript ...................................................................134
20.1.6　Brendan 的夢(mèng)想 .................................................................135
20.2　重新打造規(guī)范 ................................................................................138
20.2.1　重組規(guī)范結(jié)構(gòu) ....................................................................139
20.2.2　新的術(shù)語(yǔ) ...........................................................................140
20.2.3　新的語(yǔ)義種類 ....................................................................141
20.3　ES2015 語(yǔ)言特性 ...........................................................................142
20.3.1　Realms、Jobs、Proxies 和元對(duì)象編程（MOP） ................142
xxvi ｜ JavaScript二十年
20.3.2　塊級(jí)聲明作用域 ................................................................147
20.3.3　類 .......................................................................................151
20.3.4　模塊 ...................................................................................156
20.3.5　箭頭函數(shù) ...........................................................................159
20.3.6　其他特性 ...........................................................................161
20.3.7　延期和被放棄的特性 .........................................................162
20.4　Harmony 轉(zhuǎn)譯器 ............................................................................162
20.5　完成 ECMAScript 2015 .................................................................163
第 21 章　總結(jié) ................................................................................... 166
致謝 ................................................................................................... 168
附錄 A　登場(chǎng)人物 ............................................................................... 170
附錄 B　登場(chǎng)組織 ............................................................................... 175
附錄 C　術(shù)語(yǔ)表 .................................................................................. 177
附錄 D　縮略語(yǔ)和首字母縮寫(xiě)詞 .......................................................... 182
附錄 E　時(shí)間線 .................................................................................. 184
附錄 F　1995 年 12 月 4 日的 JavaScript 公告 ..................................... 200