I’m trying to write a regular expression to remove white spaces from just the beginning of the word, not after, and only a single space after the word. Used RegExp: Test Exapmle: Only one space should be allowed. Is it possible? Answer BTW, new RegExp(..) is redundant if you use regular expression liter…
Tag: javascript
chrome.runtime is undefined when extension installed from chrome store
When i console.log(chrome) with google chrome browser i get certain properties but i find the ‘runtime’ property of chrome is not available. so chrome.runtime is undefined. and hence i am not able to use chrome.runtime.sendMessage for my extension How to resolve the above?? EDIT : my code is : EDI…
How does Facebook disable the browser’s integrated Developer Tools?
So apparently because of the recent scams, the developer tools is exploited by people to post spam and even used to “hack” accounts. Facebook has blocked the developer tools, and I can’t even use the console. How did they do that?? One Stack Overflow post claimed that it is not possible, but…
Separate observable values by specific amount of time in RxJS
What would be the most idiomatic way to yield values of an Observable by a specific amount of time? For example, let’s say I have an Observable created from a big Array and I want to yield a value every 2 seconds. Is a combination of interval and selectMany the best way? Answer For your specific example…
Find and remove objects in an array based on a key value in JavaScript
I have been trying several approaches on how to find an object in an array, where ID = var, and if found, remove the object from the array and return the new array of objects. Data: I’m able to search the array using jQuery $grep; But how can I delete the entire object when id == 88, and return data
JavaScript – XMLHttpRequest, Access-Control-Allow-Origin errors
I’m attempting to send a XMLHttpRequest to a paste site. I’m sending an object containing all the fields that the api requires, but I keep getting this issue. I have read over the issue, and I thought: Would fix it,but it didn’t. Does anyone have any information on this error and/or how I ca…
How to display alert boxes based on if a check box is checked or not using Javascript
I am trying to make it so that if the checkbox on our page is checked it will display an alert message notifying the user they have opted in to showing their checkout history. If the user deselects the check box then it should show another alert box letting them know they are opting out of showing their check…
Can I use a try/catch in JavaScript without specifying the catch argument/identifier?
I was wondering if there is a way to not specify the argument when doing a JS try/catch. Every time I try this though, the try/catch doesn’t work. The working version: What I have in mind (No ‘e’): Answer Optional catch binding in 2019 Node.js In Node.js, this feature is called Optional Catc…
d3 sankey charts – manually position node along x axis
A problem I have come across using the d3 sankey implementation is that there’s no way to specify where on the x axis a node is. I’ve been poking through the source and there isn’t really a “clean” way to specify the x value on a reasonable scale (ie, 1-5 where the chart is 5 nod…
How to print pdf.js document?
I’ve generated a document with pdf.js and it shows correctly. I’don’t have print button. How to add the button to allow users to print it ? I was using Chrome. Answer Try using the javascript-function window.print();, which opens the print-dialog. You will have to add an button to your html,…