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javascript - 在函数内部修改变量后，为什么变量未更改？ -异步代码参考(Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference)

Given the following examples, why is outerScopeVar undefined in all cases? (给定以下示例，为什么在所有情况下都未定义outerScopeVar ？) var ... 的示例，社区可以识别 ) ask by Fabrício Matté translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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413 views

1 answer

javascript - 如何在没有连接的情况下插值JavaScript中字符串中的变量？(How to interpolate variables in strings in JavaScript, without concatenation?)

I know in PHP we can do something like this: (我知道在PHP中我们可以做这样的事情：) $hello = "foo"; $my_string = "I pity the $hello"; Output: ... 使用串联-编写起来看起来更加简洁和优雅 ) ask by DMin translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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319 views

1 answer

javascript - 异步/等待/返回不等待响应(Async / Await / Return NOT Waiting on Response)

I have a function that loops through a list of phone numbers. (我有一个遍历电话号码列表的功能 ) if one of them match the criteria, it ... 念的是什么以及为什么我不能等待响应 ) ask by MCM13 translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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366 views

1 answer

javascript - 在JavaScript中将数字转换为字符串的最佳方法是什么？(What's the best way to convert a number to a string in JavaScript?)

What's the "best" way to convert a number to a string (in terms of speed advantage, clarity advantage, memory advantage, etc ... () ""+n n+"" ask by Pacerier translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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501 views

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javascript - 如何捕获浏览器窗口关闭事件？(How to capture the browser window close event?)

I want to capture the browser window/tab close event. (我想捕获浏览器窗口/选项卡关闭事件 ) I have tried the following with jQuery: (我已经尝试使用 ... 要一个仅在用户关闭窗口时才触发的事件 ) ask by khelll translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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228 views

1 answer

javascript - 如何在HTML中绘制弧的SVG路径(How to draw SVG path for arc in html)

I am trying to create progress bar in html using SVG like following (我正在尝试使用SVG在html中创建进度条，如下所示) I tried to ... svg> </body> </html> ask by Sandip Armal Patil translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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539 views

1 answer

javascript - 异步/等待/返回不等待响应(Async / Await / Return NOT Waiting on Response)

I have a function that loops through a list of phone numbers. (我有一个遍历电话号码列表的功能 ) if one of them match the criteria, it ... 念的是什么以及为什么我不能等待响应 ) ask by MCM13 translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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425 views

1 answer

javascript - 图像因Intersection Observer API问题而延迟加载(Images lazy loading with Intersection Observer API issue)

everyone. (大家 ) I've got gallery of 1609 images and I'm trying to configure images lazy loading with Intersection observer ... (有什么提示吗？) ask by Drezor Warlock translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

1 answer

javascript - 如何复制静态文件以使用Webpack构建目录？(How to copy static files to build directory with Webpack?)

I'm trying to move from Gulp to Webpack . (我正在尝试从Gulp迁移到Webpack ) In Gulp I have task which copies all files and ... plugin? (我需要一些插件吗？) ask by Vitalii Korsakov translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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415 views

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javascript - 在异步函数上调用await会引发错误(Calling await on an async function throws an error)

I have this function : (我有这个功能：) async function fileHash(filename, algorithm = 'md5') { return new Promise((resolve, ... 是async函数 ) ask by Rahmani Saif El Moulouk translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

1 answer

javascript - 在Javascript中植入随机数生成器(Seeding the random number generator in Javascript)

是否可以在Javascript中植入随机数生成器（Math.random）？ ask by weepy translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

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javascript - 已更新-其他问题，已解决。（原始-使用promise vs async / await时以不同的方式获取解析json）(Updated- different problem, resolved. (original - fetch resolve json differently when using promise vs async/await))

UPDATE 11/28: (更新11/28：) Problem resolved. (问题已解决 ) It was in fact a completely different problem, irrelevant to fetch ... .log(json)行的输出不同 ) ask by rollerCoaster translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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javascript - 使用Rails 3.1，您在哪里放置“特定于页面”的JavaScript代码？(Using Rails 3.1, where do you put your “page specific” JavaScript code?)

To my understanding, all of your JavaScript gets merged into 1 file. (据我所知，您的所有JavaScript都合并为1个文件 ) Rails does this by ... 认为这是我问题的实际答案 ) ask by Fire Emblem translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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377 views

1 answer

javascript - 如何将状态从子级传递到应用程序组件(How to pass a state from the child to app component)

I have 2 components which both have sub components, In one of the components if the sub component is clicked I want to ... 希望在app.jsx中加载) ask by SImon Haddad translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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286 views

1 answer

javascript - 如何在JavaScript中获取输入文本值(How to get an input text value in JavaScript)

How go get an input text value in JavaScript? (如何在JavaScript中获取输入文本值？) <script language="javascript" type="text/javascript"> ... why? (谁能告诉我为什么？) ask by Maria translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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245 views

1 answer

javascript - 格式化日期与moment.js(format date with moment.js)

I have a string in this format: (我有一个这种格式的字符串：) var testDate = "Fri Apr 12 2013 19: ... deps/deps.js?9642a93ae1f8ffa8eb1c2475b198c764f183d693:231:11) ask by Warz translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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445 views

1 answer

javascript - Grunt，NPM和Bower之间的区别（package.json vs bower.json）(Difference between Grunt, NPM and Bower ( package.json vs bower.json ))

I'm new to using npm and bower, building my first app in emberjs :). (我是新手使用npm和bower，在emberjs中构建我的第一个应用程序:) ) I do ... 赖项的文件中（除了全局安装命令行工具）？) ask by apprenticeDev translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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302 views

1 answer

javascript - 尝试递归动画与JavaScript回调(trying recursive animation with callback in javascript)

so for past +12 hrs been trying to figure out how to recursively call an animation function. (因此在过去的12个小时内，我们一直 ... (table)) }); }); ask by Fahad Bilal translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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332 views

1 answer

javascript - 无法遍历ElementArrayFinder(Unable to iterate over an ElementArrayFinder)

I'm a beginner writing e2e Javascript tests using Protractor. (我是使用Protractor编写e2e Javascript测试的初学者 ) I have been trying to ... 出我在哪里出问题了吗？) ask by Jonesh Sharma translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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229 views

1 answer

javascript - JavaScript，Node.js：Array.forEach是否异步？(JavaScript, Node.js: is Array.forEach asynchronous?)

I have a question regarding the native Array.forEach implementation of JavaScript: Does it behave asynchronously? (我对JavaScript的本机Array. ... 阻塞的吗？) ask by R. Gr. translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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178 views

1 answer

javascript - 如何在数组中获取唯一值(How to get unique values in an array)

How can I get a list of unique values in an array? (如何获得数组中唯一值的列表？) Do I always have to use a second array or ... can be used. (不能使用其他库 ) ask by Astronaut translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

355 views

1 answer

javascript - 下拉列表不对jQuery中的.slideDown（）进行动画处理(Dropdown list not animating .slideDown() in jQuery)

I have a nav list with a nested which I want to expand down (and up) when hovered on. (我有一个带有嵌套的导航列表，将其悬停时可以向下 ... </a></li> </ul> </nav> ask by Filip Vuskovic translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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309 views

1 answer

javascript - 画布的fillRect函数忽略等待(Canvas' fillRect function ignores await)

I have a problem with the fillRect canvas function: I use the setFillStyle function to either set the fillStyle to a rgb value or ... 这个问题，该如何解决？) ask by SUBHUMAN translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

213 views

1 answer

javascript - 开启-window.location.hash-更改了吗？(On - window.location.hash - Change?)

I am using Ajax and hash for navigation. (我正在使用Ajax和哈希进行导航 ) Is there a way to check if the window.location.hash ... 地址框中，但我无法用JavaScript捕获它 ) ask by MilMike translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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308 views

1 answer

javascript - 在jQuery中将live（）转换为on（）(Turning live() into on() in jQuery)

My application has dynamically added Dropdowns. (我的应用程序动态添加了Dropdown ) The user can add as many as they need to. (用户可以根据需要 ... 究竟做错了什么？) Thanks! (谢谢！) ask by Jack translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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173 views

1 answer

javascript - 将符号引入ES6的动机是什么？(What is the motivation for bringing Symbols to ES6?)

UPDATE : Recently a brilliant article from Mozilla came up. (更新：最近有来自Mozilla的精彩文章出现 ) Read it if you're curious. (好奇的 ... 解释我们是否真的需要JavaScript中的符号？) ask by Yanis translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

274 views

1 answer

javascript - 如何在javascript函数中传递一组json数据？(How to pass a set of json data in javascript function?)

I have a data set as below: (我有一个数据集，如下所示：) data = '{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b ... ]，[object Object] ...这是什么问题？) Thanks. (谢谢 ) ask by D Kim translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

173 views

1 answer

javascript - AngularJS ng-单击stopPropagation(AngularJS ng-click stopPropagation)

I have a click Event on a table row and in this row there is also a delete Button with a click Event. (我在表行上有一个单 ... 按钮时，如何防止showUser事件被触发？) ask by michael_knight translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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