Recent questions tagged javascript

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javascript - How can I force the browser to redraw while my script is doing some heavy processing?

I am using the innerHTML property to modify a DIV dynamically, to report on a process that takes a few seconds ... if more scripts are running? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How would I use `do` as an RxJS lettable operator?

RxJS 5.5 allows grabbing lettable operators and piping them like so: import { ajax } from 'rxjs/observable ... operator between these commands? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Higher Order React Component for Click Tracking

I'd like to implement a higher order react component which can be used to easily track events (like a click) on any React ... ()}</Track>; }; }; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to prevent removing decimal point when parsing JSON?

If you do this... var parsed = JSON.parse('{"myNum":0.0}') ; Then when you look at parsed.myNum, ... worry about it working in other browsers.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - AngularJS - Receive and download CSV

I am using a nodeJS program as a server and an AngularJS web application as the client. To create ... question referring to AngularJS client. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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257 views

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javascript - Incrementing value continuously on mouse hold

I have an HTML5 'range' control to which I want to add a plus (+) and minus (-) buttons on either sides ... , which again does only one click. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Prevent clicking a link if scroll on mobile

I have long vertical list of links that user can scroll through, and I need to prevent triggering a click event ... to prevent such a behavior? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - When WebGL decide to update the display?

In classical OpenGL application, after we finish to render a frame, we are usually calling a non-gl method to " ... WebGL. How does it work? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - "this" inside an anonymous function?

Inside John Resig's book "Pro Javascript techniques" he describes a way of generating dynamic object methods ... for each object instantiated? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Why I can't pass console.log as a callback argument in Chrome (and Safari)?

The following snippet will produce an error in Chrome (and Safari) while it works in Firefox. I'd expect to have ... 1/jquery.min.js"></script> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to access image pixel data in react-native

I have an Image that was loaded from camera roll or any other source, usually local one. How can ... perform some calculations or measurements? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - React Beginner Question: Textfield Losing Focus On Update

I wrote a component that is supposed to list out a bunch of checkboxes with corresponding textfields. When you click on the ... } /> </div> ); } See Question&Answers more detail:...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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185 views

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javascript - how to access immediate unknown key in object

how to access immediate unknown key in object. in pic "367:sl" is dynamic key and i want to access cptyName ... "367:sl". Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - undefined and null

undefined === null => false undefined == null => true I have thought about the reason of undefined == null ... === - operation in javascript? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - $(window).scroll() firing on page load

Is there a way to prevent $(window).scroll() from firing on page load? Testing the following code in Firefox 4, it ... "Scroll Fired"); }); }); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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382 views

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javascript - Style the nth letter in a span using CSS

I have: <span id="string">12h12m12s</span> and I'm looking to make the h, m and s smaller than ... that often would be ressource intensive. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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230 views

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javascript - Async / await assignment to object keys: is it concurrent?

I know that doing this: const resultA = await a() const resultB = await b() // code here Is effectively ... .com/docs/api/promise.props.html See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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257 views

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javascript - Image drawn to HTML5 Canvas does not display correctly on first load

I'm following a tutorial on importing and displaying images on an HTML5 canvas. Everything works fine, until I try to ... drawMap(); } init(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

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javascript - does internet explorer supports e.preventDefault

Does internet explorer does not support e.preventDefault in javascript? If not what is the reason and what are the ... e.returnValue = false; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to add a polyfill to support finally() in Edge?

I'm using axios library and using then(), catch() and finally(). Works perfectly in Chrome. However the finally( ... () works in Edge? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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242 views

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javascript - Escaping of attribute values using jQuery.attr()

When using jQuery to update the title attribute of an element, I find that the entities (notably 
, which is the ... ), but it didn't work See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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242 views

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javascript - jQuery UI switchClass() method is not working properly

jQuery UI switchClass() method doesn't switch class, rather it performs some undesired animations and the class remains ... how can I fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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193 views

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javascript - Does iframe runs on the same thread as the owner?

I have a CPU intensive work to do and i don't want to degrade the user experience. since web workers (http:// ... is there a way to solve this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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149 views

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javascript - Use onchange in a div

Is it possible to use onchange event in a <div>? Because my <div> changes its text inside. Can I do ... onchange="calculateTotal();"></div> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - setTimeout not working on safari mobile

I have a function that shows a menu when clicking on it, and I want it to disappear after 5 seconds. This is ... } Where is the problem? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

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javascript - Is there a performance gain in including <script> tags as opposed to using eval?

I have seen a lot of suggestions about how one should add code dynamically like so (source): var ... the performance and security differences. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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131 views

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javascript - Defining functions after return

I'm currently reading John Papa's AngularJS style guide and saw the code: function dataService() { var someValue = '' ... (say, from IE 6)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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javascript - JS remove everything after the last occurrence of a character

Okay I have this var URL = "http://stackoverflow.com/questions/10767815/remove-everything-before-the-last- ... .com/questions/10767815/" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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