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鍍金池/ 問答/ HTML問答
網(wǎng)妓 回答

我將問題中的‘開放應(yīng)用’定義為saas平臺(tái)提供的服務(wù)吧。
例如天氣查詢，一般作為開放應(yīng)用，對(duì)外會(huì)提供API給其他開發(fā)者使用，一般會(huì)要求開發(fā)者申請(qǐng)一個(gè)appkey，然后每次請(qǐng)求的時(shí)候帶上appkey（還有的會(huì)需要帶上timestamp，甚至是sign），后端核對(duì)通過(guò)后響應(yīng)請(qǐng)求，也就是將天氣信息返回給其他那位開發(fā)者。

拽很帥 回答

flexible在安卓機(jī)是一直都為1的，團(tuán)隊(duì)在github上已經(jīng)說(shuō)過(guò)了。
flexible

clipboard.png

你可以換個(gè)框架，比如hotcss

嫑吢丕 回答

謝邀

request.addEventListener('load', this.update);

這句的request是什么東西??？

妖妖 回答

你想讓php渲染模板，那么你不能用vue-cli生成項(xiàng)目，你只能用<script>引入vue，這種場(chǎng)景下，var a = {$user}；php就可以直接渲染好啊，然后你js調(diào)用你這個(gè)變量就可以了啊

玩控 回答

1.state更新的時(shí)候是調(diào)用的setState方法啊，調(diào)用了setstate方法說(shuō)明state更新了。那這個(gè)是肯定要獲取更新后的state，然后走更新的生命周期函數(shù)。不像vue一樣，是用defineProperty定義了屬性，一開始就收集好了依賴，那么你設(shè)置屬性的時(shí)候就會(huì)觸發(fā)更新

別硬撐 回答

node只是沒有把不可枚舉的打出來(lái)而已

玄鳥 回答

CSS對(duì)于多個(gè)選擇器的優(yōu)先性使用了一個(gè)叫做特殊性的方式。

特殊性

選擇器的特殊性分為4個(gè)等級(jí)，a b c d，從左到右，越左邊的越優(yōu)先, 如果一個(gè)選擇器規(guī)則有多個(gè)相同類型選擇器，則+1。

  1. 如果是HTML內(nèi)樣式，那么特殊性最優(yōu)先，a=1

  2. id選擇器的特殊性是b，

  3. 類選擇器、偽類選擇器、屬性選擇器為c

  4. 標(biāo)簽選擇器、偽元素選擇器為d

參照上述規(guī)則，.box為：0 0 1 0， div[class=box]為： 0 0 1 1，因此，后面一個(gè)選擇器的優(yōu)先級(jí)更高

陌南塵 回答

關(guān)于問題1 ,如果引用的是runtime版vue ，沒有模板編譯功能，所以不能使用模板，要使用渲染函數(shù)。

葬憶 回答

一種方式是用promise.all，一種方式是用async+await,一種方式是在then里面嵌套

心沉 回答

不用加 this. 直接取 active

夕顏 回答

一個(gè)進(jìn)程可以打開很多socket鏈接的，你說(shuō)的一個(gè)鏈接占用一個(gè)進(jìn)程是不對(duì)的

巫婆 回答

好像不可以的，只能使用微信右上角的分享

孤酒 回答

a.findIndex(v=>v.name=='他')

別硬撐 回答

錯(cuò)誤提示已經(jīng)說(shuō)了：
found: object with keys {}，你的render函數(shù)里寫的是

<div  >{this.props.reducerCity}</div>

實(shí)際上看了你的代碼應(yīng)該是

<div  >{this.props.reducerCity.cityName}</div>

執(zhí)行兩邊可能是因?yàn)槟鉺ettimeout修改了state，會(huì)導(dǎo)致重新渲染頁(yè)面

巫婆 回答

簡(jiǎn)單來(lái)說(shuō)是有特別的標(biāo)志位。Wiki上是這么說(shuō)的：

In IEEE 754 standard-conforming floating-point storage formats, NaNs are identified by specific, pre-defined bit patterns unique to NaNs. The sign bit does not matter. Binary format NaNs are represented with the exponential field filled with ones (like infinity values), and some non-zero number in the significand field (to make them distinct from infinity values). The original IEEE 754 standard from 1985 (IEEE 754-1985) only described binary floating-point formats, and did not specify how the signaling/quiet state was to be tagged. In practice, the most significant bit of the significand field determined whether a NaN is signaling or quiet. Two different implementations, with reversed meanings, resulted:
most processors (including those of the Intel and AMD's x86 family, the Motorola 68000 family, the AIM PowerPC family, the ARM family, the Sun SPARC family, and optionally new MIPS processors) set the signaling/quiet bit to non-zero if the NaN is quiet, and to zero if the NaN is signaling. Thus, on these processors, the bit represents an 'is_quiet' flag;
in NaNs generated by the PA-RISC and old MIPS processors, the signaling/quiet bit is zero if the NaN is quiet, and non-zero if the NaN is signaling. Thus, on these processors, the bit represents an 'is_signaling' flag.
The former choice has been preferred as it allows the implementation to quiet a signaling NaN by just setting the signaling/quiet bit to 1. The reverse is not possible with the latter choice because setting the signaling/quiet bit to 0 could yield an infinity.
The 2008 revision of the IEEE 754 standard (IEEE 754-2008) makes formal recommendations for the encoding of the signaling/quiet state.
For binary formats, the most significant bit of the significand field should be an 'is_quiet' flag. I.e. this bit is non-zero if the NaN is quiet, and zero if the NaN is signaling.
For decimal formats, whether binary or decimal encoded, a NaN is identified by having the top five bits of the combination field after the sign bit set to ones. The sixth bit of the field is the 'is_quiet' flag. The standard follows the interpretation as an 'is_signaling' flag. I.e. the signaling/quiet bit is zero if the NaN is quiet, and non-zero if the NaN is signaling. A signaling NaN is quieted by clearing this sixth bit.
For IEEE 754-2008 conformance, the meaning of the signaling/quiet bit in recent MIPS processors is now configurable via the NAN2008 field of the FCSR register. This support is optional in MIPS Release 3 and required in Release 5.[10]
The state/value of the remaining bits of the significand field are not defined by the standard. This value is called the 'payload' of the NaN. If an operation has a single NaN input and propagates it to the output, the result NaN's payload should be that of the input NaN (this is not always possible for binary formats when the signaling/quiet state is encoded by an 'is_signaling' flag, as explained above). If there are multiple NaN inputs, the result NaN's payload should be from one of the input NaNs; the standard does not specify which.

哎呦喂 回答

element-ui table 貌似沒有 專門提供這東西
如果是我處理，兩步操作
第一步 把同樣的名字 排在一起 ，就是排序
第二部 通過(guò) span-method 方法來(lái) 合并列

情未了 回答

問題解決了，另外我上面也寫錯(cuò)了

pathRewrite: { '^api': '' }

應(yīng)該是'^/api'

解決方案在這里

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