Recent questions tagged Javascript

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javascript - Disable spaces in Input, AND allow back arrow?

I am trying to disable spaces in the Username text field, however my code disables using the back arrow too. Any ... http://jsfiddle.net/EJFbt/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - String interpolation on variable

Say I have a variable str var str = "123" Now I could do console.log(`Hello ${str}`) and it will ... it possible wihtout any kind of eval() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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305 views

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javascript - regex extract email from strings

I want to know if by using regular expressions I am able to extract emails from the following strings? ... [email protected] thank a See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to include scripts automatically in a yeoman/grunt project?

I have a working yeoman project. I am using grunt-usemin. To include javascripts, I do this in index.html:  See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Missing credentials for "PLAIN" nodemailer

I'm trying to use nodemailer in my contact form to receive feedback and send them directly to an email. ... appreciated, thank you very much. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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322 views

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javascript - Getting hash parameters from request url

I have such url - http://www.coolsite.com/daily-plan/#id=1 What the easiest way to parse that string and read ... value after #id=)? Thank you See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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461 views

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javascript - Drawing a rectangle using click, mouse move, and click

I'm trying to draw a rectangle by a user click, mouse move, and click. There are two problems with my code. ... http://jsbin.com/uqonuw/3/edit See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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388 views

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javascript - Restrictions of XMLHttpRequest's getResponseHeader()?

I've noticed that the results of and XMLHttpRequest.getResponseHeader() don't always match the real headers returned ( ... for 400s. What gives? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Do loops check the array.length every time when comparing i against array.length?

I was browsing around and I found this: var i, len; for(i = 0, len = array.length; i < len; i++ ... length) check the array.length each time? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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257 views

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javascript - Adding text to beginning of each array element

I have an array which contains the contents as follows: ["ZS125-48ATab", "STR125YBTab", "KS125-24Tab", "ZS125 ... element in the array. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

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javascript - Save to Local File from Blob

I have a difficult question to you, which i'm struggling on for some time now. I'm looking for a solution, ... but i want my own solution :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - setTimeout scope issue

I have a setTimeout defined inside of a function that controls the player's respawn (i am creating a game): var ... is never set back to true? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to implement debounce fn into jQuery keyup event?

A calculation is based on user input, and criteria is to use keyup rather than change or blur. The problem is that ... (context, args); }; }; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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602 views

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javascript - selectionStart-End with textareas

I'm having this annoying problem, I can't seem to get the starting and ending index of the selected text ... Did I do something wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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376 views

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javascript - Get data attribute of script tag?

Say I've got the following script tag: <script async data-id="p3PkBtuA" src="//example.com/embed.js">< ... use some sort of javascript library. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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295 views

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javascript - Group by multiple values Underscore.JS but keep the keys and values

I'm trying to group the following array with objects: [ { user_id: 301, alert_id: 199, deal_id: 32243 }, { ... is it creates its own keys. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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979 views

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javascript - Webpack Express Cannot Resolve Module 'fs', Request Dependency is Expression

When I include Express in my project I always get these errors when I try to build with webpack. webpack.config.dev.js ... ~/mime/mime.js 2:9-22 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

1 answer

javascript - Heroku: "No default language could be detected for this app" error thrown for node app

I am learning NodeJS and the course I'm following has several projects, arranged by sections. I have all the ... in both places. Any thoughts? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

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javascript - Is there an alternative method to use onbeforeunload in mobile safari?

Is there an alternative method to use instead of onbeforeunload in mobile-safari? I've noticed that Google was able to ... iPad to do my test. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'

I am creating a Chrome extension and trying to include a small text beside the SEND button of the gMail ... work in case of MutationObserver? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

javascript - ask for geolocation permission again if it was denied

im building an app through phonegap, with a geolocation button. if a user denies permission for geolocation the first ... use this feature') } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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390 views

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javascript - Why does "undefined equals false" return false?

When I compare undefined and null against Boolean false, the statement returns false: undefined == false; null == false; It return false. Why? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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293 views

1 answer

javascript - How to test if an object is a Proxy?

I would like to test if a JavaScript object is a Proxy. The trivial approach if (obj instanceof Proxy) ... ... an arbitrary object is a Proxy? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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javascript - Jquery: how to sleep or delay?

i want move up the object, delay 1000ms , then hide it, i get the code: $("#test").animate({"top":"-=80px"}, ... {"opacity":"0"},500); any idea? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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303 views

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javascript - Vue converts input[type=number] to a string value

I'm running into the problem, that Vue converts the value of an input field of type number into a string ... converting the value to a number? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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438 views

1 answer

javascript - HTML5 responsive canvas: resizing the browser canvas draw disappear

I want to make a responsive canvas using size in percentage and once user will resize the window the canvas adjust ... }); </script> Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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365 views

1 answer

javascript - Creating a collapsed range from a pixel position in FF/Webkit

Using JavaScript, I would like to create a collapsed range from a pixel position, in order to insert new nodes ... required to build a range? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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571 views

1 answer

javascript - Detect page zoom change with jQuery in Safari

I have a problem with Safari in a web application that contains a position:fixed element. When the page ... in current WebKit browsers? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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