Javascript – Can I use an event listener with two events?
I am doing a "pixel art" web page, and I don't want the "pencil" to draw when I am not pressing the button on the mouse, I try to do this but either I can make the "pencil" work with…
Javascript – Find the id of the div using onMouseOver event object
I wrote the below code to capture the id for the div, when the user hovers over the div. <div className="part-3" id="graph-1" onMouseEnter={handleHover}> <h3 className="chartHeader">Avg. marks per subject </h3> {<MarksDisplayTable/>} </div> My handleHover function looks as below - const handleHover…
Javascript – Zoom only using mouse wheel
I'd like to allow zooming on a canvas (excalidraw API) using only the mouse wheel like on google map , without pressing the ctrl key. Here are two things that I tried : useEffect(() => { const handleWheel = (event)…
Javascript – How to convert mouse position to canvas coordinate using object-fit: contain
Using object-fit: contain allow to resize a canvas to fit inside a container. This snippet is drawing a circle using mouse event position : canvas.width=1920; canvas.height=1200; const ctx=canvas.getContext("2d"); ctx.lineWidth = 10; ctx.strokeRect(0,0,canvas.width,canvas.height); canvas.onmousemove = (e) => { ctx.clearRect(0,0,canvas.width,canvas.height); ctx.strokeRect(0,0,canvas.width,canvas.height); ctx.beginPath();…
Reactjs – Add 'onClick' (or another builtin) listener to custom React component?
I've got a third party library providing some React components whose functionality I want to extend by adding on onClick() handler function. The handler function works however I don't know how to have this component listen for onClick() events and…
Html – Difference between mousedown and click
I'm trying to create a custom editor from scratch. To move the cursor I have a system with a click handler that would move the cursor and then focus my <input> element. But I am currently implementing the selection system…
How to trigger keypress event with Class name using JavaScript
I am trying to trigger a keypress event when click left mouse button in an input tag with class name. I can do with id but I don't know how to trigger with class name. How can I solve this?…
Html – How to get the hyperlink in a tag using javascript?
Here I have an html with javascript: document.addEventListener('mousedown', function(event) { let elem = event.target; let jsonObject = { Key: 'mousedown', Value: event.button }; if (event.button == 2) { console.log(elem.outerHTML); } }); <span style="font-size:xx-large"> <a href="https://microsoft.com" target="_blank" rel="noreferrer noopener" shape="rect" style="color:rgb(17,85,204)">…