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when to and when not to use "this" in JSX event handler function reference?

By : Urr Dpositive
Date : October 16 2020, 08:10 AM
hop of those help? this is necessary if you're trying to reference a function/value that is outside of the scope of the current function (render() in your case) but is still encapsulated in an object or class.
code :
const foo = () => 'foo';

class Clazz {

    otherFunc() {
        return 'otherFunc';

    render() {
        const bar = () => 'bar';

        bar() // can call directly

        this.otherFunc() // necessary as it's a "sibling" function

        foo(); // not necessary as it's a global function in this module's scope

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How do you disable or catch "paste" or "Control+V" event in an text box event handler in C# Winform?

By : user2825775
Date : March 29 2020, 07:55 AM
Hope this helps Trapping the keystroke isn't enough, the user can also paste using the context menu. This requires trapping the operation at a lower level, you have to catch the WM_PASTE message and prevent it from reaching the native Windows control. Add a new class to your project and paste the code shown below. Compile. Drop the new control from the top of the toolbox onto your form. It does have one flaw, the Paste command isn't disabled on the context menu. No easy fix for that one, you'd have to replace it with your own.
code :
using System;
using System.Windows.Forms;

class NopasteTextBox : TextBox {
    protected override void WndProc(ref Message m) {
        // Trap WM_PASTE:
        if (m.Msg == 0x302) return;
        base.WndProc(ref m);

Why can I not pass a "function declaration" as an argument in an event handler function with JQuery?

By : mastergets
Date : March 29 2020, 07:55 AM
Hope this helps Why isn't this working using function declaration, but it's working perfectly using function expression? Assuming that the only difference is how the browser loads them into the execution context. , Here:
code :
var foo = function(event){
    console.log('in foo');
$('.btn').on('click', foo);
function foo(event) {
  var data = event.data;
  if (data.whatever) { // ...
$('.btn').on('click', { whatever: true }, foo);

Why does the ".on(<event>, function())" style of jQuery event handler not work for "hover"?

By : Karanime
Date : March 29 2020, 07:55 AM
I wish this help you That's because hover is not an event name. Prior to jQuery 1.9 the library supported using this name, as is stated in the "Additional notes here:

"this" as object membership instead of node reference on an event handler?

By : nadirsha nazar huzza
Date : March 29 2020, 07:55 AM
help you fix your problem , You want to bind the function to the this that you want to use.
code :
document.getElementById('xx').addEventListener('click', this.clickHandle.bind(this));

[Vue warn]: Error in event handler for "upload-success": "TypeError: fns.apply is not a function"

By : Nathan Cleary
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Your uploadImageSuccess is set as a string, not a method. You get the error because the vue-upload-multiple-image component tries to call it as a function.
Add a method to your component to handle the successful image upload:
code :

methods: {
  uploadImageSuccess(formData, index, fileList) {
    // Do whatever you need here

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