I have a React project and in it I have the following code: (using this react hook for firebase) Instead of this, I don’t want the query to be ordered or have a limit, is there a way to make an “empty” query to get all the data from a certain collection? Answer If you pass messagesRef instea…
Category: Questions
React – problem in rendering array of components
function Circle(props) { return(this a circle) } class Lottery extends React.Component{ constructor(props){ super(props); this.state = {}; } …
Uncaught TypeError while importing from firebase/database
error that i’m getting: Uncaught TypeError: Failed to resolve module specifier “firebase/database”. Relative references must start with either “/”, “./”, or “../”. i am trying to setup firebase configuration for the latest version of firebase 9.1 PS. i hav…
chartjs time cartesian axis adapter and date library setup
I am trying to implement this tutorial and could not get it done. https://www.chartjs.org/docs/latest/axes/cartesian/time.html Input: list of objects with (time,value) attributes. Time is Integer that means unix time in seconds; value is Float. The tutorial says “Date Adapters. The time scale requires b…
How to move the cursor position within SCeditor?
I am inserting text into an instance of SCeditor and would like to move the cursor after the insert, to a specific position within the inserted text. Code of the SCeditor init: How to move the cursor? Related Code I have found deals with the range object, but there was no example of how to move the cursor: An…
Vuejs seems to struggle with v-model when many items on the page
I have a simle page containing a form at the top to submit some data and a list below that form as in the image: The list is filled by data from an api and each object has 4 properties (not many for a simple list!). Currently the list has 130 elements in total. Now if I try to write
The browser reports an error when referencing the geojson file
When referencing geojson, the browser reports an error as follows My JS code is as follows The geojson data is as follows I checked the official examples and the sample geojson data, and also verified the correctness of the genjson data Answer It’s pretty straightforward: you’re getting a 404 erro…
Download pixel art drawing as .png in PhaserJS
I need to download the created pixel drawing from this Phaser example as a .png image via FilesSaver.js but the canvas returns null. Error: Uncaught TypeError: Cannot read properties of null (reading ‘toBlob’) This is the save function: drawingArea: (PhaserJS 2) How to get the data of the drawing …
URL.createObjectURL wouldn’t work asynchronously (React)
URL.createObjectUrl wouldn’t work when I re-upload another file after uploading at the first time. videoFile is updated but it doesn’t generate object url… Answer It works. Just render the video element when file exists. Refer to the working example on Codesandbox.
How can I get an array of numbers through a form in Angular?
I need the user to type an array of numbers through an input. But doing so just returns the array as a string to me. I wish I could somehow convert a string to an array of numbers, but I don’t know how. Component.html: Component.ts: Answer 1) You can use JSON.parse() to convert an array of string to an …