Recent questions tagged Javascript

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Modern desktop version of IE 10 is always fullscreen. There is a living specification for :fullscreen pseudo- ... it without browser sniffing? 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 - Async/Await inside Array#map()

I'm getting compile time error with this code: const someFunction = async (myArray) => { return myArray.map(myValue = ... : myNewValue } }); }; See Question&Answers more detail:os...

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

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298 views

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javascript - break array of objects into separate arrays based on a property

Say I have an array like this: var arr = [ {type:"orange", title:"First"}, {type:"orange", title:" ... and Underscore are both options to use. 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: trigger onChange if input value is changing by state?

Edit: I don't want to call handleChange only if the button has been clicked. It has nothing to do with ... ://codepen.io/madhurgarg71/pen/qrbLjp See Question&Answers more detail:os...

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

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306 views

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javascript - dragging and resizing an image on html5 canvas

I am building a HTML5 canvas image editor. After uploading an image in to the canvas i need to Dragg and ... it is not suitable with canvas. 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 detect supported video formats for the HTML5 video tag?

I am making an application in HTML5 using the video tag, in the application the user chooses a video file ... for the supported video formats? 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.js - Communicating between sibling components

I'm new to React, and I'd like to ask a strategy question about how best to accomplish a task where data must be ... "Choose one" /> ) } }); See Question&Answers more detail:os...

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

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230 views

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javascript - What is the best method of re-rendering a web page on orientation change?

I have a fluid CSS layout which is rendering badly on an iphone when I change the orientation. (It looks fine ... to render the images twice. 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 - HTML5 FileReader how to return result?

I use JS FileReader. I want to get result after file reading operation and work with this data. FileReader is ... " is empty? 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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350 views

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javascript - Firefox setting to enable cross domain Ajax request

I need to temporally allow cross domain XMLHttpRequest. Changing firefox security setting seems to be the way to ... this before? 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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673 views

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javascript - Disable Chrome strict MIME type checking

Is there any way to disable strict MIME type checking in Chrome. Actually I'm making a JSONP request ... content-type to application/javascript See Question&Answers more detail:os...

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

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374 views

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javascript - Passing objects to a web worker

I'm trying to pass an object to a web worker through the postMessage function. This object is a square that has ... to this? 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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714 views

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javascript - Removing page title and date when printing web page (with CSS?)

By default, when you print a web page, the page title and and URL are printed at the top of the page, ... of doing this via CSS or javascript? See Question&Answers more detail:os...

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

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378 views

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javascript - grunt (minimatch/glob) folder exclusion

I have a situation where I'm trying to use grunt to lint a codebase, excluding specific folders. grunt ... excludes are possible in minimatch. See Question&Answers more detail:os...

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

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706 views

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javascript - puppeteer: how to wait until an element is visible?

I would like to know if I can tell puppeteer to wait until an element is displayed. const inputValidate = await ... way I can accomplish 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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283 views

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javascript - Is there a limit on length of the key (string) in JS object?

So we had a case where we would have an object, where key is id (int) and the value is the string. But we ... issues so far, but you never know. See Question&Answers more detail:os...

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

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279 views

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javascript - How can I get jQuery .val() AFTER keypress event?

I got: $(someTextInputField).keypress(function() { alert($(this).val()); }); Now the alert always returns the value ... , I'm glad to hear it! See Question&Answers more detail:os...

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

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645 views

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javascript - Uncaught ReferenceError: React is not defined

I am trying to make ReactJS work with rails using this tutorial. I am getting this error: Uncaught ReferenceError: ... id="comments"></div> See Question&Answers more detail:os...

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

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409 views

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javascript - How to parse JSON string in Typescript

Is there a way to parse strings as JSON in Typescript. Example: In JS, we can use JSON.parse(). Is there a similar ... ": "Bob", "error": false} See Question&Answers more detail:os...

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

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327 views

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javascript - Call python function from JS

I am trying to call a function in Python from my JavaScript code. I used the code explained here but it does ... know what is wrong with it? See Question&Answers more detail:os...

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

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269 views

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javascript - How can I detect DOM ready and add a class without jQuery?

I want to rewrite this line without using jQuery so it can be applied quicker (and before the downloading of ... I rewrite that without jQuery? See Question&Answers more detail:os...

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

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341 views

1 answer

javascript - Dynamically load a stylesheet with React

I'm building a CMS system for managing marketing landing pages. On the "Edit Landing Page" view, I want ... way in ComponentWillUnmount, right? See Question&Answers more detail:os...

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

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275 views

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javascript - Bootstrap v2 Dropdown Navigation not working on Mobile Browsers

I am having an issue with the Bootstrap menu dropdowns on mobile devices (Bootstrap 2). A similar question ... help would be much appreciated. 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

1 answer

javascript - Cleaner/shorter way to update nested state in Redux?

Sometimes reducers get kind of messy: const initialState = { notificationBar: { open: false, }, }; export default ... terse way to 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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378 views

1 answer

javascript - Stop people having my website loaded on multiple tabs

I want users to browse my site from only one tab in their browser. How can this be done? Would I use ... will be appreciated. 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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433 views

1 answer

javascript - CSS3-Animate elements if visible in viewport (Page Scroll)

I have added CSS animations to various div elements on my html page.But all the animations played at the same time ... i scroll down the page ? See Question&Answers more detail:os...

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

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323 views

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javascript - Extract all email addresses from bulk text using jquery

I'm having the this text below: [email protected], "assdsdf" <[email protected]>, "rodnsdfald ... all emails directly? See Question&Answers more detail:os...

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

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382 views

1 answer

javascript - How do I abort image <img> load requests without using window.stop()

I have a very long page that dynamically loads images as users scroll through. However, if a user quickly ... cancel an image from loading See Question&Answers more detail:os...

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

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