Recent questions tagged Javascript

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javascript - Get distance between two points in canvas

I have canvas drawing tab and want lineWidth to be based on distance between two last mousemove coordinate updates ... of those pointes). 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 - Automatically resize jQuery UI dialog to the width of the content loaded by ajax

I'm having a lot of trouble finding specific information and examples on this. I've got a number of jQuery ... looking for a better 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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248 views

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javascript - How to add markers on Google Maps polylines based on distance along the line?

I am trying to create a Google Map where the user can plot the route he walked/ran/bicycled and see how long ... line it is. Any suggestions? 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 can you make a vote-up-down button like in Stackoverflow?

Problems how to make an Ajax buttons (upward and downward arrows) such that the number can increase or ... programming language is Python. See Question&Answers more detail:os...

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

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318 views

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javascript - Determining a page is outdated on github pages

Github pages sets very aggressive cache headers (Cache-Control: max-age=86400 1 day, Expires 1 month ahead) on ... there may be another way? See Question&Answers more detail:os...

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

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190 views

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javascript - CSS Animation onClick

How can I get a CSS Animation to play with a JavaScript onClick? I currently have: .classname { -webkit-animation ... can I apply an onClick? 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 create a sleep/delay in nodejs that is Blocking?

I'm currently trying to learn nodejs and a small project I'm working is writing an API to control some networked LED ... an accuracy of +-10 ms? 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 - Is Crockford style Context Coloring implemented in any code editor?

I watched a video from YUIConf 2012 in which Douglas Crockford gives a talk about implementing monads in ... this context coloring scheme. 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 - React-native view auto width by text inside

As far as I know, react-native stylesheet doesn't supports min-width/max-width property. I have a view and text inside. ... Sam" "ple" "Tex" "t" 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 - Disable scrolling on `<input type=number>`

Is it possible to disable the scroll wheel changing the number in an input number field? I've messed with webkit- ... up a nice keyboard on iOS. 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 - How can I do an asc and desc sort using underscore.js?

I am currently using underscorejs for sort my json sorting. Now I have asked to do an ascending and descending ... How can I achieve this? 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 - VueJS conditionally add an attribute for an element

In VueJS we can add or remove a DOM element using v-if: <button v-if="isRequired">Important Button</ ... name.required" required> Any ideas? See Question&Answers more detail:os...

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

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176 views

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javascript - Twitter-style autocomplete in textarea

I am looking for a Javascript autocomplete implementation which includes the following: Can be used in a HTML ... would be perfect. 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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143 views

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javascript - How to develop Chrome extension for Gmail?

I'm thinking about developing Chrome extension for Gmail and I want to know what are the current best practices ... your enlightenment upon me) See Question&Answers more detail:os...

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

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137 views

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javascript - How can I use webpack with express?

When I try to use webpack with a simple express server I always get TONS of errors: express.js 'use strict'; ... display-chunks -c --progress -d See Question&Answers more detail:os...

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

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206 views

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javascript - How to run Node.js app with ES6 features enabled?

I use the require hook of BabelJS (formerly named 6to5) to run node apps with es6features: // run.js ... independently (Unix and Windows)? See Question&Answers more detail:os...

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

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129 views

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javascript - Scope issues with Angular UI modal

I'm having trouble understanding/using the scopes for an angular UI modal. While not immediately apparent here, I ... , but that feels 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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201 views

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javascript - Returning data from Axios API

I am trying to use a Node.JS application to make and receive API requests. It does a get request to another ... isn't helpful in my situation. See Question&Answers more detail:os...

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

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324 views

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javascript - Property 'catch' does not exist on type 'Observable<any>'

On the Angular 2 documentation page for using the Http service, there is an example. getHeroes (): Observable ... is mentioned about catch. See Question&Answers more detail:os...

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

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134 views

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javascript - Trying to get tag-it to work with an AJAX call

Trying to get tag-it to work with an ajax call. Everything works so far. Except, I am unable to assign a ... ? Anyone else got this to work? See Question&Answers more detail:os...

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

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227 views

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javascript - Why does the Promise constructor require a function that calls 'resolve' when complete, but 'then' does not - it returns a value instead?

As I plunge into studying Promises, my understanding has halted on the following question that I do not find ... than the then function? See Question&Answers more detail:os...

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

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186 views

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javascript - How to return an array from an AJAX call?

I'm searching for a better solution to making an AJAX call with jQuery, having the PHP file return an array, ... the AJAX call. Ideas, anyone? See Question&Answers more detail:os...

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

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294 views

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javascript - Visualization of calendar events. Algorithm to layout events with maximum width

I need your help with an algorithm (it will be developed on client side with javascript, but doesn't really ... this out. Thanks in advance See Question&Answers more detail:os...

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

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134 views

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javascript - Node.js - asynchronous module loading

Is it possible to load a Node.js module asynchronously? This is the standard code: var foo = require("./ ... in require aren't supported? See Question&Answers more detail:os...

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

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161 views

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javascript - React hooks: accessing up-to-date state from within a callback

EDIT (22 June 2020): as this question has some renewed interest, I realise there may be a few points of ... information from within a callback? See Question&Answers more detail:os...

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

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222 views

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javascript - How do I install the babel-polyfill library?

I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it ... to use the polyfills from Babel? See Question&Answers more detail:os...

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

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221 views

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javascript - Proper way to catch exception from JSON.parse

I'm using JSON.parse on a response that sometimes contains a 404 response. In the cases where it returns 404, is ... } } return value; }); See Question&Answers more detail:os...

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

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315 views

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javascript - Load ajax when scroll reaches 80%

I am using the following code which is working when the scroll bar reaches the botttom, if($(window).scrollTop() ... 70% of the scroll not 100. See Question&Answers more detail:os...

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

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