When using window.onbeforeunload (or $(window).on(“beforeunload”)), is it possible to display a custom message in that popup? Maybe a small trick that works on major browsers? By looking at existing answers I have the feeling this was possible in the past using things like confirm or alert or even…
Author: admin@master
How to add key value pair to all objects in an array with lodash
I’m looping through an array of objects, each of which has a nested array of objects: I want to add the same key value pair to all of the objects within the nested array. In other words, all of the objects in item.values should have a new key value pair added, call it newpair. I’d like to clone it…
Declare an array in TypeScript
I’m having trouble either declaring or using a boolean array in Typescript, not sure which is wrong. I get an undefined error. Am I supposed to use JavaScript syntax or declare a new Array object? Which one of these is the correct way to create the array? How would I initialize all the values to be fals…
make div appear on mouse over
I am trying to make a div .description that appears where the mouse is as it hovers over an element. So far, I have this code for making the div appear in a fixed location: It works fine, but instead of just have .description appear, I need it to appear where the mouse hovers. I tried adding this function: bu…
Is console.log atomic?
The print statement in Python is not thread-safe. Is it safe to use console.log in Node.js concurrently? If so, then is it also interleave-safe? That is, if multiple (even hundreds) of callbacks write to the console, can I be sure that the output won’t be clobbered or interleaved? Looking at the source …
Sequelize How compare year of a date in query
I’m trying to make this query: How can I perfome this query above in sequelize style? Thanks! Answer You have to use .where here, because the lefthand side of the expression (the key) is an object, so it cannot be used in the regular POJO style as an object key. If you want to combine it with other cond…
a href=javascript:function() in firefox not working
I tried using a href=javascript:function() in a button, with a function to execute it. It works in Chrome but it doesn’t work in Firefox. Firefox doesn’t alert and open blank tab. Anyone can help me? Below is button code Update I should have added that im using a live editor(profitbuilder) in word…
Moment.js compare two date thrown a warning
I have created a simple app, which need a date comparison. I used Moment.js, and I have tried on answer on this question: Compare two dates in JS Moment js date time comparison How to compare only date in moment.js But all of them not working for me. and now I use this code: But in the console it’s thro…
Relationship between HTML and javascript. The basics of frontend development
I have mainly worked at server side layer of enterprise applications (Java EE, Spring framework). Now, I am trying to understand (Just to understand, not to master) client side technologies. A read about HTML and CSS in books and online material). The next technology I want to look at is java-script. I have d…
Using Google Chrome extensions to import/export JSON files?
I’m creating a Google Chrome extension at the moment and I was wondering if it’s possible for it to both create JSON files to download (export) and create a button where users can make the extension open and parse JSON files that they have saved in their local file system or on a USB stick (import…