frontend

问题 Have been researching possible fixes for this and just cannot figure out what's wrong. The issue seems to only be in chrome. But it doesn't happen in Chrome Canary. http://jsfiddle.net/de2yzzds/6/ (use arrow keys to navigate and I also need the html this way) The slide flickers when it goes from the last slide to the first slide I'm on a mac using Chrome Version 47.0.2526.80 (64-bit) Using latest version of https://github.com/kenwheeler/slick Can anyone else recreate the issue? I've tried

问题 After returning to our project after the weekend my team was met with the error " error Couldn't find package "3d-view@^2.0.0" required by "gl-plot3d@^2.4.2" on the "npm" registry. " on our CI pipeline during the install phase. Additionally, this error occurred when trying to add packages with yarn, terminating the process. This error is happening on the front-end side of our project and doesn't show up upon starting it normally via yarn start. On the last push before the weekend everything

问题 I've used <img src={require('./somRelativePath/image.jpg)} in React many times. However, this time it seems not to be working. There are no errors whatsoever (such as that the image was not found etc.) but the broken image on website. After inspecting the element I was somewhat confused by the transpiled result in browser: <img src="[object Module]" style="width: 5rem;"> It appears as if it loads the image as a component not the acutual file. I've created the app with npx create-react-app and

问题 I am trying to transition from pure JavaScript to jQuery. I have a for loop that dynamically creates HTML elements with data from an API. Here is my old code: recipeDiv = []; recipeDiv[i] = document.createElement("div"); recipeDiv[i].setAttribute("class", "recipeBlock"); recipeDiv[i].appendChild(someElement); However, when I transitioned to jQuery and used this instead recipeDiv = []; recipeDiv[i] = $("<div/>").addClass("recipeBlock"); recipeDiv[i].appendChild(someElement); I get the

问题 when we use fetch in JS to issue a get request, we normally do thing like this fetch(endpoint).then(res => res.json()).then(result => ...) However I was watching Wes Bos's JS 30 courses and he called the intermediate result that the fetch returns a blob as in fetch(endpoint).then(blob => blob.json()).then(result => ...) I found the definition for blob here https://developer.mozilla.org/en-US/docs/Web/API/Blob I am not knowledgable enough to judge if Wes Bos was using the right term here to

问题 I want to change the background color of the select options on hover and i have tried the followed rules but it didn't worked either: select option { color: #fff; } select option:hover { color: #000; box-shadow: inset 20px 20px #fff; } What rules i have to apply to achieve that effect? Does JS recognize a hover in a option element? 回答1: you can try something like this: #select { width: 100px; } select:hover { color: #444645; background: green; /* hover on select */ } select:focus>option

问题 There are some discussions around triggering d3 drag programmably. Usually people give a work around way. Like store the drag function and trigger it directly. So is there a way to trigger d3 drag using mouse events? The d3 drag must be implemented according to mouse events. In my app, there are complicated drag setups and expose the drag handlers is not feasible. Also, I hope the code is tested only on boundaries instead of having to open it up. I'm wondering how d3 implemented the drag. I

问题 So, I basically want to have 2 different layouts for a page on my website. For under 400px: [image] description [image] description For above 400px: [image] description [image] description (so, the image and the text are on the same line) I know I can do this very easily with Bootstrap if my breakpoint was one of the predefined ones, but it is not. So, what would the best approach be? Could I still use Bootstrap grid system and 'hack' it somehow or do something else altogether? Thanks! 回答1:

问题 With paypal's client side checkout they claim you can simply drop their code onto your site (front end). However, from this example it looks like a user could modify the amount requested because the code is on the client ("Never trust the client"). Is it Possible to secure this or is server side code necessary? Code straight from demo <!DOCTYPE html> <head> <!-- Add meta tags for mobile and IE --> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta http-equiv="X-UA

问题 I have a json file that loads sales data for salespeople based on the current year and the previous year. I created a table in which I show the total sales for each year for each salesperson and, in the last row, I need to load the total for all salespeople added up. As shown in the image below: I am using dc.dataTable to create my table. Can you tell me if there is any way in DC.js to create a row in my table to put the total sales? Here is my code, thank you in advance. var vendedorTable =