Recent questions tagged javascript

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javascript - How to know browser idle time?

How can I track the browser idle time? I am using IE8. I am not using any session management and don't want to handle it on server side. 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 - VSCode Linter ES6 ES7 Babel linter

How to use Visual Studio code to lint JavaScript file based on babel/ES7 stage-0 rules? I only need to lint code. I already have webpack transpiling Js file. 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 - Use Async/Await with Axios in React.js

Following How to use async/await with axios in react I am trying to make a simple get request to my server using Async/Await in a React.js App. ... an array instead. Am I not implementing it correctly? 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 - Does the <script> tag position in HTML affects performance of the webpage?

If the script tag is above or below the body in a HTML page, does it matter for the performance of a website? And what if used in between like ... tell me what's the better style for best performance. See Question&Answers more detail:os...

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

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573 views

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javascript - Angular 2 - Check if image url is valid or broken

I am fetching a large number of image URLs from an API and display them in a angular 2 web application. Some of the URLs are broken and i want ... of status code 404 replace the broken image? 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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402 views

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javascript - Dynamically assign ng-model

I'm trying to generate a set of check-boxes from an object array. I'm aiming to have the check-boxes dynamically map their ng-model to a property ... ://jsfiddle.net/GreenGeorge/NKjXB/2/ Can anybody help? See Question&Answers more detail:os...

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

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430 views

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javascript - Wait for callback before continue for loop

I've a for-loop I'm looping through. I want to make a custom modal and wait for a response before continue it. How can I achieve this? I know I' ... 't get global variables. Excellent. (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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javascript - Maximum Lat and Long bounds for the world - Google Maps API LatLngBounds()

The Google Maps terrain view by default has unlimited panning of the map tile. You can use LatLngBounds() to limit this, but what are the maximum and minimum ... +90, -180)(-90,180) to no luck. See Question&Answers more detail:os...

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

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375 views

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javascript - HTML form with two submit buttons and two "target" attributes

I have one HTML <form>. The form has only one action="" attribute. However I wish to have two different target="" attributes, depending on which ... , but each button gives the form a different target? See Question&Answers more detail:os...

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

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720 views

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javascript - Setting a timer for a long period of time, i.e. multiple minutes

I want to use firebase auth with react native for Login and Signup but I got a yellow error: Setting a timer for a long period of time, i.e. ... (https://github.com/firebase/firebase-js-sdk/issues/97) See Question&Answers more detail:os...

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

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527 views

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javascript - How to test if a URL string is absolute or relative?

How can I test a URL if it is a relative or absolute path in Javascript or jQuery? I want to handle accordingly depending if the passed in URL is a local or ... starts with http:// or https://) //do 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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505 views

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javascript - VueJS How can I use computed property with v-for

How can I use computed property in lists. I am using VueJS v2.0.2. Here's the HTML: <div id="el"> <p v-for="item in items"> <span>{{fullName}}</ ... return item.firstname + ' ' + item.lastname; }, }, }); 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 - JSLint Expected '===' and instead saw '=='

Recently I was running some of my code through JSLint when I came up with this error. The thing I think is funny about this error though is that it ... ...That is what does not make sense to 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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796 views

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javascript - How to trigger off callback after updating state in Redux?

In React, state is not be updated instantly, so we can use callback in setState(state, callback). But how to do it in Redux? After calling the this. ... with the latest state like what I do in React? 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 - how to check if a form is valid programmatically using jQuery Validation Plugin

I have a form with a couple of buttons and I'm using jQuery Validation Plugin from http://jquery.bassistance.de/validate/. I just want to ... jquery validation plugin from anywhere in my javascript code. See Question&Answers more detail:os...

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

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451 views

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javascript - Limit labels number on Chart.js line chart

I want to display all of the points on my chart from the data I get, but I don't want to display all the labels for them, because then ... be great. But I found absolutely nothing about labels options. See Question&Answers more detail:os...

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

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463 views

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javascript - Simulate a button click in Jest

Simulating a button click seems like a very easy/standard operation. Yet, I can't get it to work in Jest.js tests. This is what I tried (and ... it alright button.simulate('click'); // Nothing happens See Question&Answers more detail:os...

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

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570 views

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javascript - How to disable the warning 'define' is not defined using JSHint and RequireJS

I uses RequireJS AMD in my project. When i run jshint on my project, it throws error like In AMD Scripts 'define' is not defined. In Mocha test ... is not defined. How to remove this warning in jshint? 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 - history.replaceState() example?

Can any one give a working example for history.replaceState? This is what w3.org says: history.replaceState(data, title [, url ] ) Updates the current ... am I missing something? Tested on latest Chrome. See Question&Answers more detail:os...

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

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393 views

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javascript - How do you set the document title in React?

I would like to set the document title (in the browser title bar) for my React application. I have tried using react-document-title (seems out ... and componentDidMount() - none of these solutions 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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366 views

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javascript - How to maintain a request session in NodeJS

I'm trying to use NodeJS to scrape a website that requires a login by POST. Then once I'm logged in I can access a separate webpage by GET. ... I ended up using zombiejs to get the functionality I needed See Question&Answers more detail:os...

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

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276 views

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javascript - Is it possible to programmatically catch all events on the page in the browser?

First of all, here is a list of event types that are defined by the W3C standards. (This list is based on the onevent attributes defined in the ... ) rather then having them simply logged in the console. See Question&Answers more detail:os...

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

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511 views

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javascript - Check if value exists in firebase DB

Is there a method in firebase, which can check if value exist in DB? Firebase has method .exists(), but according to docs it checks only the keys. I ... } I want to check if ID with value U1EL5623exists. See Question&Answers more detail:os...

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

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535 views

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javascript - d3 js - loading json without a http get

I am learning d3. There are certain ways of loading the data in d3 js. But all of them seem to make a HTTP GET. In my scenario, I already have the ... myjson' in d3 & avoid a async call to server? 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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324 views

1 answer

javascript - Environment detection: node.js or browser

I'm developping a JS-app that needs to work both on the client side and the server side (in Javascript on a browser and in Node.js), and I would like ... DocUtils= {} global.docX = [] global.docXData = [] See Question&Answers more detail:os...

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

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530 views

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javascript - How to know if .keyup() is a character key (jQuery)

How to know if .keyup() is a character key (jQuery) $("input").keyup(function() { if (key is a character) { //such as a b A b c 5 3 2 $ # ^ ! ^ * ... or shift or Esc or space ...etc /* Do stuff */ } }); See Question&Answers more detail:os...

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

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543 views

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javascript - Bootstrap 4 multiselect dropdown

I read on many forums that the problem of select and multiselect has been resolved after the beta version of bootstrap 4. Unfortunately I am unable to ... </option> <option>Relish</option> </select> See Question&Answers more detail:os...

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

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493 views

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javascript - Conditional build based on environment using Webpack

I have some things for development - e.g mocks which I would like to not bloat my distributed build file with. In RequireJS you can pass a config in a ... less hacky? Any ideas how I can do that? 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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