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What does the new operator do?

Can you briefly introduce the function of new operator?

From [JavaScriptdiscussion group] 2020-02-02 20:48:23 0  1  1598

javascript - How to get all attribute names of an img tag node using js?

{Code...} Assume that there are many img tags with a structure similar to the above, but the number of attribu...

From [JavaScriptdiscussion group] 2017-06-12 09:31:49 0  4  1597

What is the best development tool for JS?

May I ask what development tools are best for JS? What development tools do you use for your handouts? Thank y...

From [JavaScriptdiscussion group] 2018-08-25 12:52:20 0  3  1596

javascript - How does js catch an asynchronous error like Uncaught (in promise) TypeError?

1. Try to use window.onerror to capture this unknown asynchronous error, but it fails and is not detected at a...

From [JavaScriptdiscussion group] 2017-07-05 10:59:52 0  1  1596

javascript - How to use mobiscroll plug-in in vue

In the project, the previous jquery needs to be replaced by vue. The previous code was implemented using mobis...

From [JavaScriptdiscussion group] 2017-07-05 10:40:12 0  1  1596

javascript - setInterval設(shè)置１０００，卻１分鐘執(zhí)行一次

{代碼...}

From [JavaScriptdiscussion group] 2017-04-11 11:31:22 0  4  1596

What is the difference between document.write() before and after executing code a++?

<script type="text/javascript">var a=1for (var i=1;i<99;i++){a++document.write(a+"<...

From [JavaScriptdiscussion group] 2020-04-30 15:35:16 0  1  1593

javascript - 使用css中的zoom:50%后對(duì)頁(yè)面文字大小不生效，什么原因？

css樣式如下： body { zoom: 50%; } 發(fā)現(xiàn)對(duì) 圖片等都變?yōu)樵笮〉囊话?，但是字體還是設(shè)置的大小（比如font-size:30px）。什么原因？

From [JavaScriptdiscussion group] 2017-04-10 15:04:38 0  1  1592

javascript - 怎樣通過(guò)$.ajax跨域請(qǐng)求斗魚(yú)TV API 取得json數(shù)據(jù)

通過(guò)$.ajax跨域請(qǐng)求 chrome提示 Uncaught SyntaxError: Unexpected token 這是我失敗的代碼 {代碼...} 斗魚(yú)TV API文檔 我去google后，了解到返回的數(shù)據(jù)是js...

From [JavaScriptdiscussion group] 2017-04-11 11:28:21 0  11  1591

javascript - 正則表達(dá)式匹配一個(gè)6,12位字符 不能為純數(shù)字也不能為純字母，必須帶有數(shù)字和字母，同時(shí)特殊符號(hào)也是可以。

正則表達(dá)式匹配一個(gè)字符不能為純數(shù)字也不能為純字母，必須帶有數(shù)字和字母，同時(shí)特殊符號(hào)也是可以輸。可以為 aaa123 a123!@# 123!aaa 只是不能為 aaaaaa 111111

From [JavaScriptdiscussion group] 2017-04-11 11:26:16 0  4  1591

javascript - I would like to ask how to import all css and js files into an HTML file so that other HTML files do not need to be imported again?

Just like this is my common.html, then other HTML files do not need to be imported. Please find a way. . . . ....

From [JavaScriptdiscussion group] 2017-06-30 09:56:18 0  7  1590

javascript - 小程序wx.previewImage預(yù)覽圖片出現(xiàn)黑屏是什么原因？

一個(gè)類(lèi)似相冊(cè)的圖片列表，點(diǎn)擊相應(yīng)的圖片會(huì)出大圖預(yù)覽，類(lèi)似于朋友圈看圖片的功能。現(xiàn)在的問(wèn)題是點(diǎn)擊小圖后就黑屏，嘗試過(guò)用網(wǎng)絡(luò)圖片，也無(wú)法解決。在真機(jī)賞預(yù)覽也無(wú)法正常顯示。代碼如下： 現(xiàn)在的效果： 點(diǎn)擊小...

From [JavaScriptdiscussion group] 2017-04-11 12:09:31 0  3  1589

javascript - typescript 使用const 報(bào)Cannot redeclare block-scoped variable

Two files in the same directory a.ts b.ts a.ts: {code...} b.ts: {code...} The two files have no dependencies. ...

From [JavaScriptdiscussion group] 2017-06-30 09:58:05 0  2  1588

javascript - How does Vue prevent any tab page from going back to the first tab after refreshing it?

Like the example above, on the initial trainer page, when I click on the training ground page and browse the t...

From [JavaScriptdiscussion group] 2017-05-18 11:02:28 0  3  1588

寫(xiě)js時(shí)候，需要用到嚴(yán)格模式嗎？

From [JavaScriptdiscussion group] 2016-12-22 15:06:14 0  2  1587