Warning: A component is changing an uncontrolled input of type text to be controlled. Input elements should not switch from uncontrolled to controlled (or vice versa). Decide between using a controlled or uncontrolled input element for the lifetime of the component.* Following is my code: Answer The reason is…
Tag: javascript
JQuery Ajax loop delay
i am trying to make a delay in my ajax data so the loop become a little bit slower ! and here is my code here is the loop Answer Using recursion, you could put in a function sendToServer and pass through the array lines, starting index 0. The function will run from 0 to lines.length. This way you won’t
sqlite3 – insert – javascript object as values
What is the easiest solution to use a javascript object as values for a sqlite3 insert? The following code does not work. Answer First of all you need to write the SQL correctly. To insert into the columns name, age, language, you need to write the SQL like this: And pass the values of the 3 columns as parame…
How to check className in a switch statement when an element has multiple classes
In the example below I just want the option clicked to display in an alert. I’m trying to use a switch statement to determine what class was clicked. My example would work if my divs did not each contain more than one class. I tried using classList.contains in my switch statement to no avail. Is there a…
Monotonically increasing time in Node.js
This question has already been answered for the browser here, but window.performance.now() is obviously not available in Node.js. Some applications need a steady clock, i.e., a clock that monotonically increases through time, not subject to system clock drifts. For instance, Java has System.nanoTime() and C++…
HTML offsetLeft delays to change
I have four canvas in my screen, positioned two above and two below. Each one have a button that makes possible to maximize the canvas, hiding the others. This button is positioned above each canvas, with absolute position based on offsetTop and offsetLeft of the canvas. However, when I maximize or minimize a…
How convert input type=”date” in a timestamp?
I need to convert an <input type=”date”> value in a timestamp. This is my HTML code: This field has a value that I have put like 25/10/2017 My jQuery code is: But this is not working… why not? Answer make a new Date() passing the value of your input as parameter, then call getTime(). h…
Node js post request without refreshing
Is it possible to complete a post request without redirecting or refreshing the page? I am making a simple file browser in browser. The client side shows the USB stick content of the server. You know, when I open a folder, I send a string to server with the path data, so the server can send me the current fol…
How can I remove the last emoji of a group of emojis in javascript?
Let’s say I have this 3 emojis in a string: 😀🎃👪 There are not any spaces or any other character except emojis in the string. How can I remove the last emoji in javascript? Answer Ok, here is how I solved it:
Reading excel file in Reactjs
I am trying and banging my head already while trying to read excel file in Reactjs. I have tried multiple libraries out there like, Sheetjs , excel-parser, exceljs and so on (like 8-9) libraries. I am getting weird and different errors in every library. For example i am using excel-parser and getting followin…